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Grabbing analog video source with gstreamer

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Albert Costa

Grabbing analog video source with gstreamer

Hi,

I would like to know if anyone has already used GStreamer to get video from an analog source? For some reasons, I may have to use a S-Video camera for a project. So I'll need to get the video from it. Has anyone experienced using gst with a frame grabber ? (btw, I'm under winXP)

I've tried a S-Video to USB converter, but I cannot see which plugin I could use : ksvideosrc does not see it.

Any help or advice would be welcomed,

Regards,

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Philip Jägenstedt

Re: Grabbing analog video source with gstreamer

I've done capture with GStreamer using v4l2src, but if you're on XP
have a look at http://asabil.wordpress.com/2007/05/20/directshowvideosrc-for-gstreamer/
Apparently it's dshowsrcwrapper in gst-plugins-bad.

Philip

On Wed, Jul 8, 2009 at 14:41, Albert Costa<[hidden email]> wrote:

> Hi,
> I would like to know if anyone has already used GStreamer to get video from
> an analog source? For some reasons, I may have to use a S-Video camera for a
> project. So I'll need to get the video from it. Has anyone experienced using
> gst with a frame grabber ? (btw, I'm under winXP)
> I've tried a S-Video to USB converter, but I cannot see which plugin I could
> use : ksvideosrc does not see it.
> Any help or advice would be welcomed,
> Regards,
> Al
>
> ------------------------------------------------------------------------------
> Enter the BlackBerry Developer Challenge
> This is your chance to win up to $100,000 in prizes! For a limited time,
> vendors submitting new applications to BlackBerry App World(TM) will have
> the opportunity to enter the BlackBerry Developer Challenge. See full prize
> details at: http://p.sf.net/sfu/Challenge
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>

--
Philip Jägenstedt

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Julien Isorce

Re: Grabbing analog video source with gstreamer

Hi,

You can try dshowvideosrc from there:

http://www.gstreamer-winbuild.ylatuya.es/doku.php?id=download

which is different from the one who is in gst-plugins-bad

see http://bugzilla.gnome.org/show_bug.cgi?id=517203 for more informations.

Julien

2009/7/8 Philip Jägenstedt <[hidden email]>

I've done capture with GStreamer using v4l2src, but if you're on XP
have a look at http://asabil.wordpress.com/2007/05/20/directshowvideosrc-for-gstreamer/
Apparently it's dshowsrcwrapper in gst-plugins-bad.

Philip

On Wed, Jul 8, 2009 at 14:41, Albert Costa<[hidden email]> wrote:
> Hi,
> I would like to know if anyone has already used GStreamer to get video from
> an analog source? For some reasons, I may have to use a S-Video camera for a
> project. So I'll need to get the video from it. Has anyone experienced using
> gst with a frame grabber ? (btw, I'm under winXP)
> I've tried a S-Video to USB converter, but I cannot see which plugin I could
> use : ksvideosrc does not see it.
> Any help or advice would be welcomed,
> Regards,
> Al
>

> ------------------------------------------------------------------------------
> Enter the BlackBerry Developer Challenge
> This is your chance to win up to $100,000 in prizes! For a limited time,
> vendors submitting new applications to BlackBerry App World(TM) will have
> the opportunity to enter the BlackBerry Developer Challenge. See full prize
> details at: http://p.sf.net/sfu/Challenge
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>

--
Philip Jägenstedt

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Albert Costa

Re : Grabbing analog video source with gstreamer

Hi,

thanks for the tips. I actually already use the winbuilds binaries, so I got this one (though I'm on winbuild version 0.10.2, not 0.10.3).

However, I cannot see my grabber input with it. It works fine with a simple usb webcam, but looks like the Svideo to USB grabber is not handled the same way, pitty...

Regards,

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 11h53mn 54s
Objet : Re: [gst-devel] Grabbing analog video source with gstreamer

Hi,

You can try dshowvideosrc from there:

http://www.gstreamer-winbuild.ylatuya.es/doku.php?id=download

which is different from the one who is in gst-plugins-bad

see http://bugzilla.gnome.org/show_bug.cgi?id=517203 for more informations.

Julien

2009/7/8 Philip Jägenstedt <[hidden email]>

I've done capture with GStreamer using v4l2src, but if you're on XP
have a look at http://asabil.wordpress.com/2007/05/20/directshowvideosrc-for-gstreamer/
Apparently it's dshowsrcwrapper in gst-plugins-bad.

Philip

On Wed, Jul 8, 2009 at 14:41, Albert Costa<[hidden email]> wrote:
> Hi,
> I would like to know if anyone has already used GStreamer to get video from
> an analog source? For some reasons, I may have to use a S-Video camera for a
> project. So I'll need to get the video from it. Has anyone experienced using
> gst with a frame grabber ? (btw, I'm under winXP)
> I've tried a S-Video to USB converter, but I cannot see which plugin I could
> use : ksvideosrc does not see it.
> Any help or advice would be welcomed,
> Regards,
> Al
>

> ------------------------------------------------------------------------------
> Enter the BlackBerry Developer Challenge
> This is your chance to win up to $100,000 in prizes! For a limited time,
> vendors submitting new applications to BlackBerry App World(TM) will have
> the opportunity to enter the BlackBerry Developer Challenge. See full prize
> details at: http://p.sf.net/sfu/Challenge
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>

--
Philip Jägenstedt

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Julien Isorce

Re: Re : Grabbing analog video source with gstreamer

dshowvideosrc handles a capture device only if the device driver implements the directshow capture interfaces.
To check if you driver associated with your "SvideoToUsb device", implements those interfaces or not,
you can use "graphedit" (you can find it on the web).
Then if you see your device in "Video Capture Device" category, then it should be ok.

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
thanks for the tips. I actually already use the winbuilds binaries, so I got this one (though I'm on winbuild version 0.10.2, not 0.10.3).
However, I cannot see my grabber input with it. It works fine with a simple usb webcam, but looks like the Svideo to USB grabber is not handled the same way, pitty...

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 11h53mn 54s
Objet : Re: [gst-devel] Grabbing analog video source with gstreamer

Hi,

You can try dshowvideosrc from there:

http://www.gstreamer-winbuild.ylatuya.es/doku.php?id=download

which is different from the one who is in gst-plugins-bad

see http://bugzilla.gnome.org/show_bug.cgi?id=517203 for more informations.

Julien

2009/7/8 Philip Jägenstedt <[hidden email]>

I've done capture with GStreamer using v4l2src, but if you're on XP
have a look at http://asabil.wordpress.com/2007/05/20/directshowvideosrc-for-gstreamer/
Apparently it's dshowsrcwrapper in gst-plugins-bad.

Philip

On Wed, Jul 8, 2009 at 14:41, Albert Costa<[hidden email]> wrote:
> Hi,
> I would like to know if anyone has already used GStreamer to get video from
> an analog source? For some reasons, I may have to use a S-Video camera for a
> project. So I'll need to get the video from it. Has anyone experienced using
> gst with a frame grabber ? (btw, I'm under winXP)
> I've tried a S-Video to USB converter, but I cannot see which plugin I could
> use : ksvideosrc does not see it.
> Any help or advice would be welcomed,
> Regards,
> Al
>

> ------------------------------------------------------------------------------
> Enter the BlackBerry Developer Challenge
> This is your chance to win up to $100,000 in prizes! For a limited time,
> vendors submitting new applications to BlackBerry App World(TM) will have
> the opportunity to enter the BlackBerry Developer Challenge. See full prize
> details at: http://p.sf.net/sfu/Challenge
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>

--
Philip Jägenstedt

------------------------------------------------------------------------------
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vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize
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Julien Isorce

Re: Re : Re : Grabbing analog video source with gstreamer

(reply to the gst list)

Note that you should have the same error doing:

set GST_DEBUG=1
gst-launch dshowvideosrc ! fakesink

About the reason of the error, you should have this error only if you disconnect the usb link.

-->Anything with right bouton on the capture filter in graphedit, to open the property page ?
-->property page on the ouput pin ?
-->Is there a software joined to the device ? does it work ?

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
ok it does appear in the list. I wanted to add a renderer and see if it plays, but...
Problem is then that it does not see that I have a source physically connected to it. I guess that's also why gstreamer plugin does not recognize it.
See attached pict.
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 14h51mn 42s
Objet : Re: [gst-devel] Re : Grabbing analog video source with gstreamer

dshowvideosrc handles a capture device only if the device driver implements the directshow capture interfaces.
To check if you driver associated with your "SvideoToUsb device", implements those interfaces or not,
you can use "graphedit" (you can find it on the web).
Then if you see your device in "Video Capture Device" category, then it should be ok.

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
thanks for the tips. I actually already use the winbuilds binaries, so I got this one (though I'm on winbuild version 0.10.2, not 0.10.3).
However, I cannot see my grabber input with it. It works fine with a simple usb webcam, but looks like the Svideo to USB grabber is not handled the same way, pitty...

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 11h53mn 54s
Objet : Re: [gst-devel] Grabbing analog video source with gstreamer

Hi,

You can try dshowvideosrc from there:

http://www.gstreamer-winbuild.ylatuya.es/doku.php?id=download

which is different from the one who is in gst-plugins-bad

see http://bugzilla.gnome.org/show_bug.cgi?id=517203 for more informations.

Julien

2009/7/8 Philip Jägenstedt <[hidden email]>

I've done capture with GStreamer using v4l2src, but if you're on XP
have a look at http://asabil.wordpress.com/2007/05/20/directshowvideosrc-for-gstreamer/
Apparently it's dshowsrcwrapper in gst-plugins-bad.

Philip

On Wed, Jul 8, 2009 at 14:41, Albert Costa<[hidden email]> wrote:
> Hi,
> I would like to know if anyone has already used GStreamer to get video from
> an analog source? For some reasons, I may have to use a S-Video camera for a
> project. So I'll need to get the video from it. Has anyone experienced using
> gst with a frame grabber ? (btw, I'm under winXP)
> I've tried a S-Video to USB converter, but I cannot see which plugin I could
> use : ksvideosrc does not see it.
> Any help or advice would be welcomed,
> Regards,
> Al
>

> ------------------------------------------------------------------------------
> Enter the BlackBerry Developer Challenge
> This is your chance to win up to $100,000 in prizes! For a limited time,
> vendors submitting new applications to BlackBerry App World(TM) will have
> the opportunity to enter the BlackBerry Developer Challenge. See full prize
> details at: http://p.sf.net/sfu/Challenge
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>

--
Philip Jägenstedt

------------------------------------------------------------------------------
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This is your chance to win up to $100,000 in prizes! For a limited time,
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize
details at: http://p.sf.net/sfu/Challenge
_______________________________________________
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Albert Costa

Re : Re : Re : Grabbing analog video source with gstreamer

Hi,

when using this command line, I just end up with a 'ERROR:..\..\sys\winks\ksvideohelpers.c:487:???: assertion failed: (vih->bmiHeader.biWidth == width)', and a crash.

In graphedit, the property page for the element shows video decoder options (mainly PAL and SECAM formats). The output pin also reports the decoder options, plus the image format. And if I connect a video renderer and try to play, it says no peripheral is connected.

There is a software provided with the hardware, I tested it at home it did allow the grabbing. But I don't know if there's a way to use the hw without the sw...

Regards,

De : Julien Isorce <[hidden email]>
À : Gstreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 17h12mn 45s
Objet : Re: [gst-devel] Re : Re : Grabbing analog video source with gstreamer

(reply to the gst list)

Note that you should have the same error doing:

set GST_DEBUG=1
gst-launch dshowvideosrc ! fakesink

About the reason of the error, you should have this error only if you disconnect the usb link.

-->Anything with right bouton on the capture filter in graphedit, to open the property page ?
-->property page on the ouput pin ?
-->Is there a software joined to the device ? does it work ?

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
ok it does appear in the list. I wanted to add a renderer and see if it plays, but...
Problem is then that it does not see that I have a source physically connected to it. I guess that's also why gstreamer plugin does not recognize it.
See attached pict.
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 14h51mn 42s
Objet : Re: [gst-devel] Re : Grabbing analog video source with gstreamer

dshowvideosrc handles a capture device only if the device driver implements the directshow capture interfaces.
To check if you driver associated with your "SvideoToUsb device", implements those interfaces or not,
you can use "graphedit" (you can find it on the web).
Then if you see your device in "Video Capture Device" category, then it should be ok.

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
thanks for the tips. I actually already use the winbuilds binaries, so I got this one (though I'm on winbuild version 0.10.2, not 0.10.3).
However, I cannot see my grabber input with it. It works fine with a simple usb webcam, but looks like the Svideo to USB grabber is not handled the same way, pitty...

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 11h53mn 54s
Objet : Re: [gst-devel] Grabbing analog video source with gstreamer

Hi,

You can try dshowvideosrc from there:

http://www.gstreamer-winbuild.ylatuya.es/doku.php?id=download

which is different from the one who is in gst-plugins-bad

see http://bugzilla.gnome.org/show_bug.cgi?id=517203 for more informations.

Julien

2009/7/8 Philip Jägenstedt <[hidden email]>

I've done capture with GStreamer using v4l2src, but if you're on XP
have a look at http://asabil.wordpress.com/2007/05/20/directshowvideosrc-for-gstreamer/
Apparently it's dshowsrcwrapper in gst-plugins-bad.

Philip

On Wed, Jul 8, 2009 at 14:41, Albert Costa<[hidden email]> wrote:
> Hi,
> I would like to know if anyone has already used GStreamer to get video from
> an analog source? For some reasons, I may have to use a S-Video camera for a
> project. So I'll need to get the video from it. Has anyone experienced using
> gst with a frame grabber ? (btw, I'm under winXP)
> I've tried a S-Video to USB converter, but I cannot see which plugin I could
> use : ksvideosrc does not see it.
> Any help or advice would be welcomed,
> Regards,
> Al
>

> ------------------------------------------------------------------------------
> Enter the BlackBerry Developer Challenge
> This is your chance to win up to $100,000 in prizes! For a limited time,
> vendors submitting new applications to BlackBerry App World(TM) will have
> the opportunity to enter the BlackBerry Developer Challenge. See full prize
> details at: http://p.sf.net/sfu/Challenge
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>

--
Philip Jägenstedt

------------------------------------------------------------------------------
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This is your chance to win up to $100,000 in prizes! For a limited time,
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize
details at: http://p.sf.net/sfu/Challenge
_______________________________________________
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details at: http://p.sf.net/sfu/Challenge
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Julien Isorce

Re: Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/16 Albert Costa <[hidden email]>

In graphedit, the property page for the element shows video decoder options (mainly PAL and SECAM formats). The output pin also reports the decoder options, plus the image format.

And if I connect a video renderer and try to play, it says no peripheral is connected.

So it's not a GStreamer problem.

There is a software provided with the hardware, I tested it at home it did allow the grabbing. But I don't know if there's a way to use the hw without the sw...

From my experience, if you can see the hw in graphedit then you can use it without the sw. If not, you can't.

Try to grab using "Window Movie Maker" that is installed by default on winxp
(select "capture from video device")

Regards,
Al

Julien

De : Julien Isorce <[hidden email]>
À : Gstreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 17h12mn 45s
Objet : Re: [gst-devel] Re : Re : Grabbing analog video source with gstreamer

(reply to the gst list)

Note that you should have the same error doing:

set GST_DEBUG=1
gst-launch dshowvideosrc ! fakesink

About the reason of the error, you should have this error only if you disconnect the usb link.

-->Anything with right bouton on the capture filter in graphedit, to open the property page ?
-->property page on the ouput pin ?
-->Is there a software joined to the device ? does it work ?

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
ok it does appear in the list. I wanted to add a renderer and see if it plays, but...
Problem is then that it does not see that I have a source physically connected to it. I guess that's also why gstreamer plugin does not recognize it.
See attached pict.
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 14h51mn 42s
Objet : Re: [gst-devel] Re : Grabbing analog video source with gstreamer

dshowvideosrc handles a capture device only if the device driver implements the directshow capture interfaces.
To check if you driver associated with your "SvideoToUsb device", implements those interfaces or not,
you can use "graphedit" (you can find it on the web).
Then if you see your device in "Video Capture Device" category, then it should be ok.

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
thanks for the tips. I actually already use the winbuilds binaries, so I got this one (though I'm on winbuild version 0.10.2, not 0.10.3).
However, I cannot see my grabber input with it. It works fine with a simple usb webcam, but looks like the Svideo to USB grabber is not handled the same way, pitty...

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 11h53mn 54s
Objet : Re: [gst-devel] Grabbing analog video source with gstreamer

Hi,

You can try dshowvideosrc from there:

http://www.gstreamer-winbuild.ylatuya.es/doku.php?id=download

which is different from the one who is in gst-plugins-bad

see http://bugzilla.gnome.org/show_bug.cgi?id=517203 for more informations.

Julien

2009/7/8 Philip Jägenstedt <[hidden email]>

I've done capture with GStreamer using v4l2src, but if you're on XP
have a look at http://asabil.wordpress.com/2007/05/20/directshowvideosrc-for-gstreamer/
Apparently it's dshowsrcwrapper in gst-plugins-bad.

Philip

On Wed, Jul 8, 2009 at 14:41, Albert Costa<[hidden email]> wrote:
> Hi,
> I would like to know if anyone has already used GStreamer to get video from
> an analog source? For some reasons, I may have to use a S-Video camera for a
> project. So I'll need to get the video from it. Has anyone experienced using
> gst with a frame grabber ? (btw, I'm under winXP)
> I've tried a S-Video to USB converter, but I cannot see which plugin I could
> use : ksvideosrc does not see it.
> Any help or advice would be welcomed,
> Regards,
> Al
>

> ------------------------------------------------------------------------------
> Enter the BlackBerry Developer Challenge
> This is your chance to win up to $100,000 in prizes! For a limited time,
> vendors submitting new applications to BlackBerry App World(TM) will have
> the opportunity to enter the BlackBerry Developer Challenge. See full prize
> details at: http://p.sf.net/sfu/Challenge
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>

--
Philip Jägenstedt

------------------------------------------------------------------------------
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vendors submitting new applications to BlackBerry App World(TM) will have
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details at: http://p.sf.net/sfu/Challenge
_______________________________________________
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Albert Costa

Re : Re : Re : Re : Grabbing analog video source with gstreamer

Hi again,

I've moved a bit forward, but not enought yet to achieve grabbing with gstreamer. First thing I did was to check I could acquire from WinMovieMaker, and that worked. I even successed with virtualdub.

Then I noticed was that my grabber source was emiting in YUY2 format. When I gst-inspected my dshowvideosrc I realized it was not a supported format (was version 0.10.10), which explained the 'could not link elements' message I had with a simple dshowvideosrc ! fakesink pipeline.

I have installed latest winbuilds version (now 0.10.4-prerelease). This one handles YUY2. But now I get a new error "gstdshowvideosrc.c:653:gst_dshowvideosrc_change_state: Can't RUN the directshow capture graph (error=-2147023729)"

I have tried to check on the web possible problems, but found nothing relevant. Only thing was to check directx version, and I have 9.0c.

It feels frustrating to see all components but gstreamer able to acquire my video...

Regards,

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 16 Juillet 2009, 15h32mn 55s
Objet : Re: [gst-devel] Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/16 Albert Costa <[hidden email]>

In graphedit, the property page for the element shows video decoder options (mainly PAL and SECAM formats). The output pin also reports the decoder options, plus the image format.

And if I connect a video renderer and try to play, it says no peripheral is connected.

So it's not a GStreamer problem.

There is a software provided with the hardware, I tested it at home it did allow the grabbing. But I don't know if there's a way to use the hw without the sw...

Regards,
Al

Julien

De : Julien Isorce <[hidden email]>
À : Gstreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 17h12mn 45s
Objet : Re: [gst-devel] Re : Re : Grabbing analog video source with gstreamer

(reply to the gst list)

Note that you should have the same error doing:

set GST_DEBUG=1
gst-launch dshowvideosrc ! fakesink

About the reason of the error, you should have this error only if you disconnect the usb link.

-->Anything with right bouton on the capture filter in graphedit, to open the property page ?
-->property page on the ouput pin ?
-->Is there a software joined to the device ? does it work ?

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
ok it does appear in the list. I wanted to add a renderer and see if it plays, but...
Problem is then that it does not see that I have a source physically connected to it. I guess that's also why gstreamer plugin does not recognize it.
See attached pict.
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 14h51mn 42s
Objet : Re: [gst-devel] Re : Grabbing analog video source with gstreamer

dshowvideosrc handles a capture device only if the device driver implements the directshow capture interfaces.
To check if you driver associated with your "SvideoToUsb device", implements those interfaces or not,
you can use "graphedit" (you can find it on the web).
Then if you see your device in "Video Capture Device" category, then it should be ok.

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
thanks for the tips. I actually already use the winbuilds binaries, so I got this one (though I'm on winbuild version 0.10.2, not 0.10.3).
However, I cannot see my grabber input with it. It works fine with a simple usb webcam, but looks like the Svideo to USB grabber is not handled the same way, pitty...

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 11h53mn 54s
Objet : Re: [gst-devel] Grabbing analog video source with gstreamer

Hi,

You can try dshowvideosrc from there:

http://www.gstreamer-winbuild.ylatuya.es/doku.php?id=download

which is different from the one who is in gst-plugins-bad

see http://bugzilla.gnome.org/show_bug.cgi?id=517203 for more informations.

Julien

2009/7/8 Philip Jägenstedt <[hidden email]>

I've done capture with GStreamer using v4l2src, but if you're on XP
have a look at http://asabil.wordpress.com/2007/05/20/directshowvideosrc-for-gstreamer/
Apparently it's dshowsrcwrapper in gst-plugins-bad.

Philip

On Wed, Jul 8, 2009 at 14:41, Albert Costa<[hidden email]> wrote:
> Hi,
> I would like to know if anyone has already used GStreamer to get video from
> an analog source? For some reasons, I may have to use a S-Video camera for a
> project. So I'll need to get the video from it. Has anyone experienced using
> gst with a frame grabber ? (btw, I'm under winXP)
> I've tried a S-Video to USB converter, but I cannot see which plugin I could
> use : ksvideosrc does not see it.
> Any help or advice would be welcomed,
> Regards,
> Al
>

> ------------------------------------------------------------------------------
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> vendors submitting new applications to BlackBerry App World(TM) will have
> the opportunity to enter the BlackBerry Developer Challenge. See full prize
> details at: http://p.sf.net/sfu/Challenge
> _______________________________________________
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> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>

--
Philip Jägenstedt

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Julien Isorce

Re: Re : Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/17 Albert Costa <[hidden email]>

Hi again,
I've moved a bit forward, but not enought yet to achieve grabbing with gstreamer. First thing I did was to check I could acquire from WinMovieMaker, and that worked. I even successed with virtualdub.

ok but still does not work with graphedit ? if yes this is really strange. You have to figure out what is going on because dshowvideosrc builds a directshow graph as graphedit does.

Then I noticed was that my grabber source was emiting in YUY2 format. When I gst-inspected my dshowvideosrc I realized it was not a supported format (was version 0.10.10), which explained the 'could not link elements' message I had with a simple dshowvideosrc ! fakesink pipeline.

I have installed latest winbuilds version (now 0.10.4-prerelease). This one handles YUY2. But now I get a new error "gstdshowvideosrc.c:653:gst_dshowvideosrc_change_state: Can't RUN the directshow capture graph (error=-2147023729)"

I think this is the same error as you got in graphedit ("device not connected")

I have tried to check on the web possible problems, but found nothing relevant. Only thing was to check directx version, and I have 9.0c.
It feels frustrating to see all components but gstreamer able to acquire my video...

You could report the graphedit problem to the device company. They often uses it.
If you resolve the graphedit pb then dshowvideosrc will work. That's all I can do without having the device in my hands.

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>

Envoyé le : Jeudi, 16 Juillet 2009, 15h32mn 55s
Objet : Re: [gst-devel] Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/16 Albert Costa <[hidden email]>

In graphedit, the property page for the element shows video decoder options (mainly PAL and SECAM formats). The output pin also reports the decoder options, plus the image format.

And if I connect a video renderer and try to play, it says no peripheral is connected.

So it's not a GStreamer problem.

There is a software provided with the hardware, I tested it at home it did allow the grabbing. But I don't know if there's a way to use the hw without the sw...

From my experience, if you can see the hw in graphedit then you can use it without the sw. If not, you can't.

Try to grab using "Window Movie Maker" that is installed by default on winxp
(select "capture from video device")

Regards,
Al

Julien

De : Julien Isorce <[hidden email]>

À : Gstreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 17h12mn 45s
Objet : Re: [gst-devel] Re : Re : Grabbing analog video source with gstreamer

(reply to the gst list)

Note that you should have the same error doing:

set GST_DEBUG=1
gst-launch dshowvideosrc ! fakesink

About the reason of the error, you should have this error only if you disconnect the usb link.

-->Anything with right bouton on the capture filter in graphedit, to open the property page ?
-->property page on the ouput pin ?
-->Is there a software joined to the device ? does it work ?

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
ok it does appear in the list. I wanted to add a renderer and see if it plays, but...
Problem is then that it does not see that I have a source physically connected to it. I guess that's also why gstreamer plugin does not recognize it.
See attached pict.
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 14h51mn 42s
Objet : Re: [gst-devel] Re : Grabbing analog video source with gstreamer

dshowvideosrc handles a capture device only if the device driver implements the directshow capture interfaces.
To check if you driver associated with your "SvideoToUsb device", implements those interfaces or not,
you can use "graphedit" (you can find it on the web).
Then if you see your device in "Video Capture Device" category, then it should be ok.

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
thanks for the tips. I actually already use the winbuilds binaries, so I got this one (though I'm on winbuild version 0.10.2, not 0.10.3).
However, I cannot see my grabber input with it. It works fine with a simple usb webcam, but looks like the Svideo to USB grabber is not handled the same way, pitty...

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 11h53mn 54s
Objet : Re: [gst-devel] Grabbing analog video source with gstreamer

Hi,

You can try dshowvideosrc from there:

http://www.gstreamer-winbuild.ylatuya.es/doku.php?id=download

which is different from the one who is in gst-plugins-bad

see http://bugzilla.gnome.org/show_bug.cgi?id=517203 for more informations.

Julien

2009/7/8 Philip Jägenstedt <[hidden email]>

I've done capture with GStreamer using v4l2src, but if you're on XP
have a look at http://asabil.wordpress.com/2007/05/20/directshowvideosrc-for-gstreamer/
Apparently it's dshowsrcwrapper in gst-plugins-bad.

Philip

On Wed, Jul 8, 2009 at 14:41, Albert Costa<[hidden email]> wrote:
> Hi,
> I would like to know if anyone has already used GStreamer to get video from
> an analog source? For some reasons, I may have to use a S-Video camera for a
> project. So I'll need to get the video from it. Has anyone experienced using
> gst with a frame grabber ? (btw, I'm under winXP)
> I've tried a S-Video to USB converter, but I cannot see which plugin I could
> use : ksvideosrc does not see it.
> Any help or advice would be welcomed,
> Regards,
> Al
>

> ------------------------------------------------------------------------------
> Enter the BlackBerry Developer Challenge
> This is your chance to win up to $100,000 in prizes! For a limited time,
> vendors submitting new applications to BlackBerry App World(TM) will have
> the opportunity to enter the BlackBerry Developer Challenge. See full prize
> details at: http://p.sf.net/sfu/Challenge
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>

--
Philip Jägenstedt

------------------------------------------------------------------------------
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Albert Costa

Re : Re : Re : Re : Re : Grabbing analog video source with gstreamer

Hi Julien,

thanks for your patient help! I've followed your advice. I have connected the graphedit to the running thread of virtualdub acquisition, so I have seen the full graph running. There was a missing element when I tried previously to build the chain myself. So now I'm also able to grab from graphedit, using the correct elements. Now, from the gstreamer point of view, how can I know which elements the plugin really tries to put in the graph? (and yes, the reported error means 'no connected device').

Regards,

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Vendredi, 17 Juillet 2009, 15h42mn 42s
Objet : Re: [gst-devel] Re : Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/17 Albert Costa <[hidden email]>

Hi again,
I've moved a bit forward, but not enought yet to achieve grabbing with gstreamer. First thing I did was to check I could acquire from WinMovieMaker, and that worked. I even successed with virtualdub.

ok but still does not work with graphedit ? if yes this is really strange. You have to figure out what is going on because dshowvideosrc builds a directshow graph as graphedit does.

Then I noticed was that my grabber source was emiting in YUY2 format. When I gst-inspected my dshowvideosrc I realized it was not a supported format (was version 0.10.10), which explained the 'could not link elements' message I had with a simple dshowvideosrc ! fakesink pipeline.

I have installed latest winbuilds version (now 0.10.4-prerelease). This one handles YUY2. But now I get a new error "gstdshowvideosrc.c:653:gst_dshowvideosrc_change_state: Can't RUN the directshow capture graph (error=-2147023729)"

I think this is the same error as you got in graphedit ("device not connected")

I have tried to check on the web possible problems, but found nothing relevant. Only thing was to check directx version, and I have 9.0c.
It feels frustrating to see all components but gstreamer able to acquire my video...

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>

Envoyé le : Jeudi, 16 Juillet 2009, 15h32mn 55s
Objet : Re: [gst-devel] Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/16 Albert Costa <[hidden email]>

In graphedit, the property page for the element shows video decoder options (mainly PAL and SECAM formats). The output pin also reports the decoder options, plus the image format.

And if I connect a video renderer and try to play, it says no peripheral is connected.

So it's not a GStreamer problem.

There is a software provided with the hardware, I tested it at home it did allow the grabbing. But I don't know if there's a way to use the hw without the sw...

From my experience, if you can see the hw in graphedit then you can use it without the sw. If not, you can't.

Try to grab using "Window Movie Maker" that is installed by default on winxp
(select "capture from video device")

Regards,
Al

Julien

De : Julien Isorce <[hidden email]>

À : Gstreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 17h12mn 45s
Objet : Re: [gst-devel] Re : Re : Grabbing analog video source with gstreamer

(reply to the gst list)

Note that you should have the same error doing:

set GST_DEBUG=1
gst-launch dshowvideosrc ! fakesink

About the reason of the error, you should have this error only if you disconnect the usb link.

-->Anything with right bouton on the capture filter in graphedit, to open the property page ?
-->property page on the ouput pin ?
-->Is there a software joined to the device ? does it work ?

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
ok it does appear in the list. I wanted to add a renderer and see if it plays, but...
Problem is then that it does not see that I have a source physically connected to it. I guess that's also why gstreamer plugin does not recognize it.
See attached pict.
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 14h51mn 42s
Objet : Re: [gst-devel] Re : Grabbing analog video source with gstreamer

dshowvideosrc handles a capture device only if the device driver implements the directshow capture interfaces.
To check if you driver associated with your "SvideoToUsb device", implements those interfaces or not,
you can use "graphedit" (you can find it on the web).
Then if you see your device in "Video Capture Device" category, then it should be ok.

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
thanks for the tips. I actually already use the winbuilds binaries, so I got this one (though I'm on winbuild version 0.10.2, not 0.10.3).
However, I cannot see my grabber input with it. It works fine with a simple usb webcam, but looks like the Svideo to USB grabber is not handled the same way, pitty...

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 11h53mn 54s
Objet : Re: [gst-devel] Grabbing analog video source with gstreamer

Hi,

You can try dshowvideosrc from there:

http://www.gstreamer-winbuild.ylatuya.es/doku.php?id=download

which is different from the one who is in gst-plugins-bad

see http://bugzilla.gnome.org/show_bug.cgi?id=517203 for more informations.

Julien

2009/7/8 Philip Jägenstedt <[hidden email]>

I've done capture with GStreamer using v4l2src, but if you're on XP
have a look at http://asabil.wordpress.com/2007/05/20/directshowvideosrc-for-gstreamer/
Apparently it's dshowsrcwrapper in gst-plugins-bad.

Philip

On Wed, Jul 8, 2009 at 14:41, Albert Costa<[hidden email]> wrote:
> Hi,
> I would like to know if anyone has already used GStreamer to get video from
> an analog source? For some reasons, I may have to use a S-Video camera for a
> project. So I'll need to get the video from it. Has anyone experienced using
> gst with a frame grabber ? (btw, I'm under winXP)
> I've tried a S-Video to USB converter, but I cannot see which plugin I could
> use : ksvideosrc does not see it.
> Any help or advice would be welcomed,
> Regards,
> Al
>

> ------------------------------------------------------------------------------
> Enter the BlackBerry Developer Challenge
> This is your chance to win up to $100,000 in prizes! For a limited time,
> vendors submitting new applications to BlackBerry App World(TM) will have
> the opportunity to enter the BlackBerry Developer Challenge. See full prize
> details at: http://p.sf.net/sfu/Challenge
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>

--
Philip Jägenstedt

------------------------------------------------------------------------------
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Julien Isorce

Re: Re : Re : Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/17 Albert Costa <[hidden email]>

Hi Julien,
thanks for your patient help! I've followed your advice. I have connected the graphedit to the running thread of virtualdub acquisition, so I have seen the full graph running.

ok cool

There was a missing element when I tried previously to build the chain myself. So now I'm also able to grab from graphedit, using the correct elements.

What was exactly the missing element ? could you send us a screenshot ?
right click on the output pin, then "render pin" does not insert this element ?

Now, from the gstreamer point of view, how can I know which elements the plugin really tries to put in the graph? (and yes, the reported error means 'no connected device').

dshowvideosrc just builds a directshow graph that contains a "video capture source filter" and
a "custom directshow fakesink filter" (this fakesink has nothing to deal with the gstreamer one, and you cannot instanciate it in graphedit)

But this "custom directshow fakesink filter" accepts any pin caps.

So the following should works:

gst-launch-0.10 dshowvideosrc device-name="your device name that you see in graphedit in video capture source category" ! fakesink

Any infos on the missing element that resolved the "no connected device" may help.

Have you also tried to update the driver of you device ?

Julien

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Vendredi, 17 Juillet 2009, 15h42mn 42s
Objet : Re: [gst-devel] Re : Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/17 Albert Costa <[hidden email]>

Hi again,
I've moved a bit forward, but not enought yet to achieve grabbing with gstreamer. First thing I did was to check I could acquire from WinMovieMaker, and that worked. I even successed with virtualdub.

ok but still does not work with graphedit ? if yes this is really strange. You have to figure out what is going on because dshowvideosrc builds a directshow graph as graphedit does.

Then I noticed was that my grabber source was emiting in YUY2 format. When I gst-inspected my dshowvideosrc I realized it was not a supported format (was version 0.10.10), which explained the 'could not link elements' message I had with a simple dshowvideosrc ! fakesink pipeline.

I have installed latest winbuilds version (now 0.10.4-prerelease). This one handles YUY2. But now I get a new error "gstdshowvideosrc.c:653:gst_dshowvideosrc_change_state: Can't RUN the directshow capture graph (error=-2147023729)"

I think this is the same error as you got in graphedit ("device not connected")

I have tried to check on the web possible problems, but found nothing relevant. Only thing was to check directx version, and I have 9.0c.
It feels frustrating to see all components but gstreamer able to acquire my video...

You could report the graphedit problem to the device company. They often uses it.
If you resolve the graphedit pb then dshowvideosrc will work. That's all I can do without having the device in my hands.

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>

Envoyé le : Jeudi, 16 Juillet 2009, 15h32mn 55s
Objet : Re: [gst-devel] Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/16 Albert Costa <[hidden email]>

In graphedit, the property page for the element shows video decoder options (mainly PAL and SECAM formats). The output pin also reports the decoder options, plus the image format.

And if I connect a video renderer and try to play, it says no peripheral is connected.

So it's not a GStreamer problem.

There is a software provided with the hardware, I tested it at home it did allow the grabbing. But I don't know if there's a way to use the hw without the sw...

From my experience, if you can see the hw in graphedit then you can use it without the sw. If not, you can't.

Try to grab using "Window Movie Maker" that is installed by default on winxp
(select "capture from video device")

Regards,
Al

Julien

De : Julien Isorce <[hidden email]>

À : Gstreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 17h12mn 45s
Objet : Re: [gst-devel] Re : Re : Grabbing analog video source with gstreamer

(reply to the gst list)

Note that you should have the same error doing:

set GST_DEBUG=1
gst-launch dshowvideosrc ! fakesink

About the reason of the error, you should have this error only if you disconnect the usb link.

-->Anything with right bouton on the capture filter in graphedit, to open the property page ?
-->property page on the ouput pin ?
-->Is there a software joined to the device ? does it work ?

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
ok it does appear in the list. I wanted to add a renderer and see if it plays, but...
Problem is then that it does not see that I have a source physically connected to it. I guess that's also why gstreamer plugin does not recognize it.
See attached pict.
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 14h51mn 42s
Objet : Re: [gst-devel] Re : Grabbing analog video source with gstreamer

dshowvideosrc handles a capture device only if the device driver implements the directshow capture interfaces.
To check if you driver associated with your "SvideoToUsb device", implements those interfaces or not,
you can use "graphedit" (you can find it on the web).
Then if you see your device in "Video Capture Device" category, then it should be ok.

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
thanks for the tips. I actually already use the winbuilds binaries, so I got this one (though I'm on winbuild version 0.10.2, not 0.10.3).
However, I cannot see my grabber input with it. It works fine with a simple usb webcam, but looks like the Svideo to USB grabber is not handled the same way, pitty...

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 11h53mn 54s
Objet : Re: [gst-devel] Grabbing analog video source with gstreamer

Hi,

You can try dshowvideosrc from there:

http://www.gstreamer-winbuild.ylatuya.es/doku.php?id=download

which is different from the one who is in gst-plugins-bad

see http://bugzilla.gnome.org/show_bug.cgi?id=517203 for more informations.

Julien

2009/7/8 Philip Jägenstedt <[hidden email]>

I've done capture with GStreamer using v4l2src, but if you're on XP
have a look at http://asabil.wordpress.com/2007/05/20/directshowvideosrc-for-gstreamer/
Apparently it's dshowsrcwrapper in gst-plugins-bad.

Philip

On Wed, Jul 8, 2009 at 14:41, Albert Costa<[hidden email]> wrote:
> Hi,
> I would like to know if anyone has already used GStreamer to get video from
> an analog source? For some reasons, I may have to use a S-Video camera for a
> project. So I'll need to get the video from it. Has anyone experienced using
> gst with a frame grabber ? (btw, I'm under winXP)
> I've tried a S-Video to USB converter, but I cannot see which plugin I could
> use : ksvideosrc does not see it.
> Any help or advice would be welcomed,
> Regards,
> Al
>

> ------------------------------------------------------------------------------
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>

--
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Albert Costa

Re : Re : Re : Re : Re : Grabbing analog video source with gstreamer

In reply to this post by Julien Isorce

Hi,

I think I get the final word. The graph, as I saw it from the vdub process, contains 2 elements for the capture (don't know why the hw provider did so, by that's the fact). And checking the source code of the dshowvideosrc element, I see that it only adds a capture element (+ a fake sink). So it will never work with my hardware, unless I make changes in the source code myself to handle this specific case.

Thanks a lot for your help anyway, now I understand how the full thing works (or not...).

Regards,

2009/7/17 Albert Costa <[hidden email]>

Hi again,
I've moved a bit forward, but not enought yet to achieve grabbing with gstreamer. First thing I did was to check I could acquire from WinMovieMaker, and that worked. I even successed with virtualdub.

ok but still does not work with graphedit ? if yes this is really strange. You have to figure out what is going on because dshowvideosrc builds a directshow graph as graphedit does.

Then I noticed was that my grabber source was emiting in YUY2 format. When I gst-inspected my dshowvideosrc I realized it was not a supported format (was version 0.10.10), which explained the 'could not link elements' message I had with a simple dshowvideosrc ! fakesink pipeline.

I have installed latest winbuilds version (now 0.10.4-prerelease). This one handles YUY2. But now I get a new error "gstdshowvideosrc.c:653:gst_dshowvideosrc_change_state: Can't RUN the directshow capture graph (error=-2147023729)"

I think this is the same error as you got in graphedit ("device not connected")

I have tried to check on the web possible problems, but found nothing relevant. Only thing was to check directx version, and I have 9.0c.
It feels frustrating to see all components but gstreamer able to acquire my video...

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>

Envoyé le : Jeudi, 16 Juillet 2009, 15h32mn 55s
Objet : Re: [gst-devel] Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/16 Albert Costa <[hidden email]>

In graphedit, the property page for the element shows video decoder options (mainly PAL and SECAM formats). The output pin also reports the decoder options, plus the image format.

And if I connect a video renderer and try to play, it says no peripheral is connected.

So it's not a GStreamer problem.

There is a software provided with the hardware, I tested it at home it did allow the grabbing. But I don't know if there's a way to use the hw without the sw...

From my experience, if you can see the hw in graphedit then you can use it without the sw. If not, you can't.

Try to grab using "Window Movie Maker" that is installed by default on winxp
(select "capture from video device")

Regards,
Al

Julien

De : Julien Isorce <[hidden email]>

À : Gstreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 17h12mn 45s
Objet : Re: [gst-devel] Re : Re : Grabbing analog video source with gstreamer

(reply to the gst list)

Note that you should have the same error doing:

set GST_DEBUG=1
gst-launch dshowvideosrc ! fakesink

About the reason of the error, you should have this error only if you disconnect the usb link.

-->Anything with right bouton on the capture filter in graphedit, to open the property page ?
-->property page on the ouput pin ?
-->Is there a software joined to the device ? does it work ?

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
ok it does appear in the list. I wanted to add a renderer and see if it plays, but...
Problem is then that it does not see that I have a source physically connected to it. I guess that's also why gstreamer plugin does not recognize it.
See attached pict.
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 14h51mn 42s
Objet : Re: [gst-devel] Re : Grabbing analog video source with gstreamer

dshowvideosrc handles a capture device only if the device driver implements the directshow capture interfaces.
To check if you driver associated with your "SvideoToUsb device", implements those interfaces or not,
you can use "graphedit" (you can find it on the web).
Then if you see your device in "Video Capture Device" category, then it should be ok.

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
thanks for the tips. I actually already use the winbuilds binaries, so I got this one (though I'm on winbuild version 0.10.2, not 0.10.3).
However, I cannot see my grabber input with it. It works fine with a simple usb webcam, but looks like the Svideo to USB grabber is not handled the same way, pitty...

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 11h53mn 54s
Objet : Re: [gst-devel] Grabbing analog video source with gstreamer

Hi,

You can try dshowvideosrc from there:

http://www.gstreamer-winbuild.ylatuya.es/doku.php?id=download

which is different from the one who is in gst-plugins-bad

see http://bugzilla.gnome.org/show_bug.cgi?id=517203 for more informations.

Julien

2009/7/8 Philip Jägenstedt <[hidden email]>

I've done capture with GStreamer using v4l2src, but if you're on XP
have a look at http://asabil.wordpress.com/2007/05/20/directshowvideosrc-for-gstreamer/
Apparently it's dshowsrcwrapper in gst-plugins-bad.

Philip

On Wed, Jul 8, 2009 at 14:41, Albert Costa<[hidden email]> wrote:
> Hi,
> I would like to know if anyone has already used GStreamer to get video from
> an analog source? For some reasons, I may have to use a S-Video camera for a
> project. So I'll need to get the video from it. Has anyone experienced using
> gst with a frame grabber ? (btw, I'm under winXP)
> I've tried a S-Video to USB converter, but I cannot see which plugin I could
> use : ksvideosrc does not see it.
> Any help or advice would be welcomed,
> Regards,
> Al
>

> ------------------------------------------------------------------------------
> Enter the BlackBerry Developer Challenge
> This is your chance to win up to $100,000 in prizes! For a limited time,
> vendors submitting new applications to BlackBerry App World(TM) will have
> the opportunity to enter the BlackBerry Developer Challenge. See full prize
> details at: http://p.sf.net/sfu/Challenge
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>

--
Philip Jägenstedt

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Albert Costa

Re : Re : Re : Re : Re : Re : Grabbing analog video source with gstreamer

In reply to this post by Julien Isorce

Hi,

I send the screenshot of the working graph. As you can see (and as I explained in my last post), it needs 2 elements to capture the source, which is why the dshowvideosrc element cannot work with this device (because it only expects/adds one element).

Regards,

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Vendredi, 17 Juillet 2009, 17h18mn 27s
Objet : Re: [gst-devel] Re : Re : Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/17 Albert Costa <[hidden email]>

Hi Julien,
thanks for your patient help! I've followed your advice. I have connected the graphedit to the running thread of virtualdub acquisition, so I have seen the full graph running.

ok cool

There was a missing element when I tried previously to build the chain myself. So now I'm also able to grab from graphedit, using the correct elements.

What was exactly the missing element ? could you send us a screenshot ?
right click on the output pin, then "render pin" does not insert this element ?

Now, from the gstreamer point of view, how can I know which elements the plugin really tries to put in the graph? (and yes, the reported error means 'no connected device').

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Vendredi, 17 Juillet 2009, 15h42mn 42s
Objet : Re: [gst-devel] Re : Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/17 Albert Costa <[hidden email]>

Hi again,
I've moved a bit forward, but not enought yet to achieve grabbing with gstreamer. First thing I did was to check I could acquire from WinMovieMaker, and that worked. I even successed with virtualdub.

ok but still does not work with graphedit ? if yes this is really strange. You have to figure out what is going on because dshowvideosrc builds a directshow graph as graphedit does.

Then I noticed was that my grabber source was emiting in YUY2 format. When I gst-inspected my dshowvideosrc I realized it was not a supported format (was version 0.10.10), which explained the 'could not link elements' message I had with a simple dshowvideosrc ! fakesink pipeline.

I have installed latest winbuilds version (now 0.10.4-prerelease). This one handles YUY2. But now I get a new error "gstdshowvideosrc.c:653:gst_dshowvideosrc_change_state: Can't RUN the directshow capture graph (error=-2147023729)"

I think this is the same error as you got in graphedit ("device not connected")

I have tried to check on the web possible problems, but found nothing relevant. Only thing was to check directx version, and I have 9.0c.
It feels frustrating to see all components but gstreamer able to acquire my video...

You could report the graphedit problem to the device company. They often uses it.
If you resolve the graphedit pb then dshowvideosrc will work. That's all I can do without having the device in my hands.

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>

Envoyé le : Jeudi, 16 Juillet 2009, 15h32mn 55s
Objet : Re: [gst-devel] Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/16 Albert Costa <[hidden email]>

In graphedit, the property page for the element shows video decoder options (mainly PAL and SECAM formats). The output pin also reports the decoder options, plus the image format.

And if I connect a video renderer and try to play, it says no peripheral is connected.

So it's not a GStreamer problem.

There is a software provided with the hardware, I tested it at home it did allow the grabbing. But I don't know if there's a way to use the hw without the sw...

From my experience, if you can see the hw in graphedit then you can use it without the sw. If not, you can't.

Try to grab using "Window Movie Maker" that is installed by default on winxp
(select "capture from video device")

Regards,
Al

Julien

De : Julien Isorce <[hidden email]>

À : Gstreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 17h12mn 45s
Objet : Re: [gst-devel] Re : Re : Grabbing analog video source with gstreamer

(reply to the gst list)

Note that you should have the same error doing:

set GST_DEBUG=1
gst-launch dshowvideosrc ! fakesink

About the reason of the error, you should have this error only if you disconnect the usb link.

-->Anything with right bouton on the capture filter in graphedit, to open the property page ?
-->property page on the ouput pin ?
-->Is there a software joined to the device ? does it work ?

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
ok it does appear in the list. I wanted to add a renderer and see if it plays, but...
Problem is then that it does not see that I have a source physically connected to it. I guess that's also why gstreamer plugin does not recognize it.
See attached pict.
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 14h51mn 42s
Objet : Re: [gst-devel] Re : Grabbing analog video source with gstreamer

dshowvideosrc handles a capture device only if the device driver implements the directshow capture interfaces.
To check if you driver associated with your "SvideoToUsb device", implements those interfaces or not,
you can use "graphedit" (you can find it on the web).
Then if you see your device in "Video Capture Device" category, then it should be ok.

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
thanks for the tips. I actually already use the winbuilds binaries, so I got this one (though I'm on winbuild version 0.10.2, not 0.10.3).
However, I cannot see my grabber input with it. It works fine with a simple usb webcam, but looks like the Svideo to USB grabber is not handled the same way, pitty...

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 11h53mn 54s
Objet : Re: [gst-devel] Grabbing analog video source with gstreamer

Hi,

You can try dshowvideosrc from there:

http://www.gstreamer-winbuild.ylatuya.es/doku.php?id=download

which is different from the one who is in gst-plugins-bad

see http://bugzilla.gnome.org/show_bug.cgi?id=517203 for more informations.

Julien

2009/7/8 Philip Jägenstedt <[hidden email]>

I've done capture with GStreamer using v4l2src, but if you're on XP
have a look at http://asabil.wordpress.com/2007/05/20/directshowvideosrc-for-gstreamer/
Apparently it's dshowsrcwrapper in gst-plugins-bad.

Philip

On Wed, Jul 8, 2009 at 14:41, Albert Costa<[hidden email]> wrote:
> Hi,
> I would like to know if anyone has already used GStreamer to get video from
> an analog source? For some reasons, I may have to use a S-Video camera for a
> project. So I'll need to get the video from it. Has anyone experienced using
> gst with a frame grabber ? (btw, I'm under winXP)
> I've tried a S-Video to USB converter, but I cannot see which plugin I could
> use : ksvideosrc does not see it.
> Any help or advice would be welcomed,
> Regards,
> Al
>

> ------------------------------------------------------------------------------
> Enter the BlackBerry Developer Challenge
> This is your chance to win up to $100,000 in prizes! For a limited time,
> vendors submitting new applications to BlackBerry App World(TM) will have
> the opportunity to enter the BlackBerry Developer Challenge. See full prize
> details at: http://p.sf.net/sfu/Challenge
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>

--
Philip Jägenstedt

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grabbergraph.jpg (98K) Download Attachment

Julien Isorce

Re: Re : Re : Re : Re : Re : Re : Grabbing analog video source with gstreamer

Hi,

First, the" missing" element you was talking about is a classic "crossbar" directshow filter.
Drivers of capture devices that contain a tuner, usually implement the crossbar interface.
So it's not something weird.

Second, the not normal thing is that the capture filter needs to be connected to the crossbar in order to start.
(and that's why you got "not connected device")

I have no tuner capture device here so I cannot send you a screenshot.

Well, it should have a way to avoid the use of the crossbar filter.

Julien

2009/7/17 Albert Costa <[hidden email]>

Hi,
I send the screenshot of the working graph. As you can see (and as I explained in my last post), it needs 2 elements to capture the source, which is why the dshowvideosrc element cannot work with this device (because it only expects/adds one element).

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>

Envoyé le : Vendredi, 17 Juillet 2009, 17h18mn 27s
Objet : Re: [gst-devel] Re : Re : Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/17 Albert Costa <[hidden email]>

Hi Julien,
thanks for your patient help! I've followed your advice. I have connected the graphedit to the running thread of virtualdub acquisition, so I have seen the full graph running.

ok cool

There was a missing element when I tried previously to build the chain myself. So now I'm also able to grab from graphedit, using the correct elements.

What was exactly the missing element ? could you send us a screenshot ?
right click on the output pin, then "render pin" does not insert this element ?

Now, from the gstreamer point of view, how can I know which elements the plugin really tries to put in the graph? (and yes, the reported error means 'no connected device').

dshowvideosrc just builds a directshow graph that contains a "video capture source filter" and
a "custom directshow fakesink filter" (this fakesink has nothing to deal with the gstreamer one, and you cannot instanciate it in graphedit)

But this "custom directshow fakesink filter" accepts any pin caps.

So the following should works:

gst-launch-0.10 dshowvideosrc device-name="your device name that you see in graphedit in video capture source category" ! fakesink

Any infos on the missing element that resolved the "no connected device" may help.

Have you also tried to update the driver of you device ?

Julien

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>

Envoyé le : Vendredi, 17 Juillet 2009, 15h42mn 42s
Objet : Re: [gst-devel] Re : Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/17 Albert Costa <[hidden email]>

Hi again,
I've moved a bit forward, but not enought yet to achieve grabbing with gstreamer. First thing I did was to check I could acquire from WinMovieMaker, and that worked. I even successed with virtualdub.

ok but still does not work with graphedit ? if yes this is really strange. You have to figure out what is going on because dshowvideosrc builds a directshow graph as graphedit does.

Then I noticed was that my grabber source was emiting in YUY2 format. When I gst-inspected my dshowvideosrc I realized it was not a supported format (was version 0.10.10), which explained the 'could not link elements' message I had with a simple dshowvideosrc ! fakesink pipeline.

I have installed latest winbuilds version (now 0.10.4-prerelease). This one handles YUY2. But now I get a new error "gstdshowvideosrc.c:653:gst_dshowvideosrc_change_state: Can't RUN the directshow capture graph (error=-2147023729)"

I think this is the same error as you got in graphedit ("device not connected")

I have tried to check on the web possible problems, but found nothing relevant. Only thing was to check directx version, and I have 9.0c.
It feels frustrating to see all components but gstreamer able to acquire my video...

You could report the graphedit problem to the device company. They often uses it.
If you resolve the graphedit pb then dshowvideosrc will work. That's all I can do without having the device in my hands.

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>

Envoyé le : Jeudi, 16 Juillet 2009, 15h32mn 55s
Objet : Re: [gst-devel] Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/16 Albert Costa <[hidden email]>

In graphedit, the property page for the element shows video decoder options (mainly PAL and SECAM formats). The output pin also reports the decoder options, plus the image format.

And if I connect a video renderer and try to play, it says no peripheral is connected.

So it's not a GStreamer problem.

There is a software provided with the hardware, I tested it at home it did allow the grabbing. But I don't know if there's a way to use the hw without the sw...

From my experience, if you can see the hw in graphedit then you can use it without the sw. If not, you can't.

Try to grab using "Window Movie Maker" that is installed by default on winxp
(select "capture from video device")

Regards,
Al

Julien

De : Julien Isorce <[hidden email]>

À : Gstreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 17h12mn 45s
Objet : Re: [gst-devel] Re : Re : Grabbing analog video source with gstreamer

(reply to the gst list)

Note that you should have the same error doing:

set GST_DEBUG=1
gst-launch dshowvideosrc ! fakesink

About the reason of the error, you should have this error only if you disconnect the usb link.

-->Anything with right bouton on the capture filter in graphedit, to open the property page ?
-->property page on the ouput pin ?
-->Is there a software joined to the device ? does it work ?

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
ok it does appear in the list. I wanted to add a renderer and see if it plays, but...
Problem is then that it does not see that I have a source physically connected to it. I guess that's also why gstreamer plugin does not recognize it.
See attached pict.
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 14h51mn 42s
Objet : Re: [gst-devel] Re : Grabbing analog video source with gstreamer

dshowvideosrc handles a capture device only if the device driver implements the directshow capture interfaces.
To check if you driver associated with your "SvideoToUsb device", implements those interfaces or not,
you can use "graphedit" (you can find it on the web).
Then if you see your device in "Video Capture Device" category, then it should be ok.

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
thanks for the tips. I actually already use the winbuilds binaries, so I got this one (though I'm on winbuild version 0.10.2, not 0.10.3).
However, I cannot see my grabber input with it. It works fine with a simple usb webcam, but looks like the Svideo to USB grabber is not handled the same way, pitty...

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 11h53mn 54s
Objet : Re: [gst-devel] Grabbing analog video source with gstreamer

Hi,

You can try dshowvideosrc from there:

http://www.gstreamer-winbuild.ylatuya.es/doku.php?id=download

which is different from the one who is in gst-plugins-bad

see http://bugzilla.gnome.org/show_bug.cgi?id=517203 for more informations.

Julien

2009/7/8 Philip Jägenstedt <[hidden email]>

I've done capture with GStreamer using v4l2src, but if you're on XP
have a look at http://asabil.wordpress.com/2007/05/20/directshowvideosrc-for-gstreamer/
Apparently it's dshowsrcwrapper in gst-plugins-bad.

Philip

On Wed, Jul 8, 2009 at 14:41, Albert Costa<[hidden email]> wrote:
> Hi,
> I would like to know if anyone has already used GStreamer to get video from
> an analog source? For some reasons, I may have to use a S-Video camera for a
> project. So I'll need to get the video from it. Has anyone experienced using
> gst with a frame grabber ? (btw, I'm under winXP)
> I've tried a S-Video to USB converter, but I cannot see which plugin I could
> use : ksvideosrc does not see it.
> Any help or advice would be welcomed,
> Regards,
> Al
>

> ------------------------------------------------------------------------------
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> vendors submitting new applications to BlackBerry App World(TM) will have
> the opportunity to enter the BlackBerry Developer Challenge. See full prize
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> _______________________________________________
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> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>

--
Philip Jägenstedt

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Julien Isorce

Re: Re : Re : Re : Re : Re : Re : Grabbing analog video source with gstreamer

hmm, could you try to create again the same graph than the one in the screenshot.
But, just before to click on play, try to disconnect the crossbar from the capture filtre.
Then click play and tell me if that works.

if yes, try to do the same steps, except you just remove the crossbar before to play.

If that works, it means that there is no default "route" and so a physical input has to be set before to play the graph.

Julien

2009/7/20 Julien Isorce <[hidden email]>

Hi,

First, the" missing" element you was talking about is a classic "crossbar" directshow filter.
Drivers of capture devices that contain a tuner, usually implement the crossbar interface.
So it's not something weird.

Second, the not normal thing is that the capture filter needs to be connected to the crossbar in order to start.
(and that's why you got "not connected device")

I have no tuner capture device here so I cannot send you a screenshot.

Well, it should have a way to avoid the use of the crossbar filter.

Julien

2009/7/17 Albert Costa <[hidden email]>

Hi,
I send the screenshot of the working graph. As you can see (and as I explained in my last post), it needs 2 elements to capture the source, which is why the dshowvideosrc element cannot work with this device (because it only expects/adds one element).

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>

Envoyé le : Vendredi, 17 Juillet 2009, 17h18mn 27s
Objet : Re: [gst-devel] Re : Re : Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/17 Albert Costa <[hidden email]>

Hi Julien,
thanks for your patient help! I've followed your advice. I have connected the graphedit to the running thread of virtualdub acquisition, so I have seen the full graph running.

ok cool

There was a missing element when I tried previously to build the chain myself. So now I'm also able to grab from graphedit, using the correct elements.

What was exactly the missing element ? could you send us a screenshot ?
right click on the output pin, then "render pin" does not insert this element ?

Now, from the gstreamer point of view, how can I know which elements the plugin really tries to put in the graph? (and yes, the reported error means 'no connected device').

dshowvideosrc just builds a directshow graph that contains a "video capture source filter" and
a "custom directshow fakesink filter" (this fakesink has nothing to deal with the gstreamer one, and you cannot instanciate it in graphedit)

But this "custom directshow fakesink filter" accepts any pin caps.

So the following should works:

gst-launch-0.10 dshowvideosrc device-name="your device name that you see in graphedit in video capture source category" ! fakesink

Any infos on the missing element that resolved the "no connected device" may help.

Have you also tried to update the driver of you device ?

Julien

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>

Envoyé le : Vendredi, 17 Juillet 2009, 15h42mn 42s
Objet : Re: [gst-devel] Re : Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/17 Albert Costa <[hidden email]>

Hi again,
I've moved a bit forward, but not enought yet to achieve grabbing with gstreamer. First thing I did was to check I could acquire from WinMovieMaker, and that worked. I even successed with virtualdub.

ok but still does not work with graphedit ? if yes this is really strange. You have to figure out what is going on because dshowvideosrc builds a directshow graph as graphedit does.

Then I noticed was that my grabber source was emiting in YUY2 format. When I gst-inspected my dshowvideosrc I realized it was not a supported format (was version 0.10.10), which explained the 'could not link elements' message I had with a simple dshowvideosrc ! fakesink pipeline.

I have installed latest winbuilds version (now 0.10.4-prerelease). This one handles YUY2. But now I get a new error "gstdshowvideosrc.c:653:gst_dshowvideosrc_change_state: Can't RUN the directshow capture graph (error=-2147023729)"

I think this is the same error as you got in graphedit ("device not connected")

I have tried to check on the web possible problems, but found nothing relevant. Only thing was to check directx version, and I have 9.0c.
It feels frustrating to see all components but gstreamer able to acquire my video...

You could report the graphedit problem to the device company. They often uses it.
If you resolve the graphedit pb then dshowvideosrc will work. That's all I can do without having the device in my hands.

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>

Envoyé le : Jeudi, 16 Juillet 2009, 15h32mn 55s
Objet : Re: [gst-devel] Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/16 Albert Costa <[hidden email]>

In graphedit, the property page for the element shows video decoder options (mainly PAL and SECAM formats). The output pin also reports the decoder options, plus the image format.

And if I connect a video renderer and try to play, it says no peripheral is connected.

So it's not a GStreamer problem.

There is a software provided with the hardware, I tested it at home it did allow the grabbing. But I don't know if there's a way to use the hw without the sw...

From my experience, if you can see the hw in graphedit then you can use it without the sw. If not, you can't.

Try to grab using "Window Movie Maker" that is installed by default on winxp
(select "capture from video device")

Regards,
Al

Julien

De : Julien Isorce <[hidden email]>

À : Gstreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 17h12mn 45s
Objet : Re: [gst-devel] Re : Re : Grabbing analog video source with gstreamer

(reply to the gst list)

Note that you should have the same error doing:

set GST_DEBUG=1
gst-launch dshowvideosrc ! fakesink

About the reason of the error, you should have this error only if you disconnect the usb link.

-->Anything with right bouton on the capture filter in graphedit, to open the property page ?
-->property page on the ouput pin ?
-->Is there a software joined to the device ? does it work ?

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
ok it does appear in the list. I wanted to add a renderer and see if it plays, but...
Problem is then that it does not see that I have a source physically connected to it. I guess that's also why gstreamer plugin does not recognize it.
See attached pict.
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 14h51mn 42s
Objet : Re: [gst-devel] Re : Grabbing analog video source with gstreamer

dshowvideosrc handles a capture device only if the device driver implements the directshow capture interfaces.
To check if you driver associated with your "SvideoToUsb device", implements those interfaces or not,
you can use "graphedit" (you can find it on the web).
Then if you see your device in "Video Capture Device" category, then it should be ok.

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
thanks for the tips. I actually already use the winbuilds binaries, so I got this one (though I'm on winbuild version 0.10.2, not 0.10.3).
However, I cannot see my grabber input with it. It works fine with a simple usb webcam, but looks like the Svideo to USB grabber is not handled the same way, pitty...

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 11h53mn 54s
Objet : Re: [gst-devel] Grabbing analog video source with gstreamer

Hi,

You can try dshowvideosrc from there:

http://www.gstreamer-winbuild.ylatuya.es/doku.php?id=download

which is different from the one who is in gst-plugins-bad

see http://bugzilla.gnome.org/show_bug.cgi?id=517203 for more informations.

Julien

2009/7/8 Philip Jägenstedt <[hidden email]>

I've done capture with GStreamer using v4l2src, but if you're on XP
have a look at http://asabil.wordpress.com/2007/05/20/directshowvideosrc-for-gstreamer/
Apparently it's dshowsrcwrapper in gst-plugins-bad.

Philip

On Wed, Jul 8, 2009 at 14:41, Albert Costa<[hidden email]> wrote:
> Hi,
> I would like to know if anyone has already used GStreamer to get video from
> an analog source? For some reasons, I may have to use a S-Video camera for a
> project. So I'll need to get the video from it. Has anyone experienced using
> gst with a frame grabber ? (btw, I'm under winXP)
> I've tried a S-Video to USB converter, but I cannot see which plugin I could
> use : ksvideosrc does not see it.
> Any help or advice would be welcomed,
> Regards,
> Al
>

> ------------------------------------------------------------------------------
> Enter the BlackBerry Developer Challenge
> This is your chance to win up to $100,000 in prizes! For a limited time,
> vendors submitting new applications to BlackBerry App World(TM) will have
> the opportunity to enter the BlackBerry Developer Challenge. See full prize
> details at: http://p.sf.net/sfu/Challenge
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>

--
Philip Jägenstedt

------------------------------------------------------------------------------
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Albert Costa

Re : Re : Re : Re : Re : Re : Re : Grabbing analog video source with gstreamer

Hi Julien,

unfortunately, that doesn't work. As soon as I remove the link from the x-bar to the analog capture element, trying to play fails with 'no connected device' message.

Regards,

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Lundi, 20 Juillet 2009, 11h39mn 11s
Objet : Re: [gst-devel] Re : Re : Re : Re : Re : Re : Grabbing analog video source with gstreamer

hmm, could you try to create again the same graph than the one in the screenshot.
But, just before to click on play, try to disconnect the crossbar from the capture filtre.
Then click play and tell me if that works.

if yes, try to do the same steps, except you just remove the crossbar before to play.

If that works, it means that there is no default "route" and so a physical input has to be set before to play the graph.

Julien

2009/7/20 Julien Isorce <[hidden email]>

Hi,

First, the" missing" element you was talking about is a classic "crossbar" directshow filter.
Drivers of capture devices that contain a tuner, usually implement the crossbar interface.
So it's not something weird.

Second, the not normal thing is that the capture filter needs to be connected to the crossbar in order to start.
(and that's why you got "not connected device")

I have no tuner capture device here so I cannot send you a screenshot.

Well, it should have a way to avoid the use of the crossbar filter.

Julien

2009/7/17 Albert Costa <[hidden email]>

Hi,
I send the screenshot of the working graph. As you can see (and as I explained in my last post), it needs 2 elements to capture the source, which is why the dshowvideosrc element cannot work with this device (because it only expects/adds one element).

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>

Envoyé le : Vendredi, 17 Juillet 2009, 17h18mn 27s
Objet : Re: [gst-devel] Re : Re : Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/17 Albert Costa <[hidden email]>

Hi Julien,
thanks for your patient help! I've followed your advice. I have connected the graphedit to the running thread of virtualdub acquisition, so I have seen the full graph running.

ok cool

There was a missing element when I tried previously to build the chain myself. So now I'm also able to grab from graphedit, using the correct elements.

What was exactly the missing element ? could you send us a screenshot ?
right click on the output pin, then "render pin" does not insert this element ?

Now, from the gstreamer point of view, how can I know which elements the plugin really tries to put in the graph? (and yes, the reported error means 'no connected device').

dshowvideosrc just builds a directshow graph that contains a "video capture source filter" and
a "custom directshow fakesink filter" (this fakesink has nothing to deal with the gstreamer one, and you cannot instanciate it in graphedit)

But this "custom directshow fakesink filter" accepts any pin caps.

So the following should works:

gst-launch-0.10 dshowvideosrc device-name="your device name that you see in graphedit in video capture source category" ! fakesink

Any infos on the missing element that resolved the "no connected device" may help.

Have you also tried to update the driver of you device ?

Julien

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>

Envoyé le : Vendredi, 17 Juillet 2009, 15h42mn 42s
Objet : Re: [gst-devel] Re : Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/17 Albert Costa <[hidden email]>

Hi again,
I've moved a bit forward, but not enought yet to achieve grabbing with gstreamer. First thing I did was to check I could acquire from WinMovieMaker, and that worked. I even successed with virtualdub.

ok but still does not work with graphedit ? if yes this is really strange. You have to figure out what is going on because dshowvideosrc builds a directshow graph as graphedit does.

Then I noticed was that my grabber source was emiting in YUY2 format. When I gst-inspected my dshowvideosrc I realized it was not a supported format (was version 0.10.10), which explained the 'could not link elements' message I had with a simple dshowvideosrc ! fakesink pipeline.

I have installed latest winbuilds version (now 0.10.4-prerelease). This one handles YUY2. But now I get a new error "gstdshowvideosrc.c:653:gst_dshowvideosrc_change_state: Can't RUN the directshow capture graph (error=-2147023729)"

I think this is the same error as you got in graphedit ("device not connected")

I have tried to check on the web possible problems, but found nothing relevant. Only thing was to check directx version, and I have 9.0c.
It feels frustrating to see all components but gstreamer able to acquire my video...

You could report the graphedit problem to the device company. They often uses it.
If you resolve the graphedit pb then dshowvideosrc will work. That's all I can do without having the device in my hands.

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>

Envoyé le : Jeudi, 16 Juillet 2009, 15h32mn 55s
Objet : Re: [gst-devel] Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/16 Albert Costa <[hidden email]>

In graphedit, the property page for the element shows video decoder options (mainly PAL and SECAM formats). The output pin also reports the decoder options, plus the image format.

And if I connect a video renderer and try to play, it says no peripheral is connected.

So it's not a GStreamer problem.

There is a software provided with the hardware, I tested it at home it did allow the grabbing. But I don't know if there's a way to use the hw without the sw...

From my experience, if you can see the hw in graphedit then you can use it without the sw. If not, you can't.

Try to grab using "Window Movie Maker" that is installed by default on winxp
(select "capture from video device")

Regards,
Al

Julien

De : Julien Isorce <[hidden email]>

À : Gstreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 17h12mn 45s
Objet : Re: [gst-devel] Re : Re : Grabbing analog video source with gstreamer

(reply to the gst list)

Note that you should have the same error doing:

set GST_DEBUG=1
gst-launch dshowvideosrc ! fakesink

About the reason of the error, you should have this error only if you disconnect the usb link.

-->Anything with right bouton on the capture filter in graphedit, to open the property page ?
-->property page on the ouput pin ?
-->Is there a software joined to the device ? does it work ?

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
ok it does appear in the list. I wanted to add a renderer and see if it plays, but...
Problem is then that it does not see that I have a source physically connected to it. I guess that's also why gstreamer plugin does not recognize it.
See attached pict.
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 14h51mn 42s
Objet : Re: [gst-devel] Re : Grabbing analog video source with gstreamer

dshowvideosrc handles a capture device only if the device driver implements the directshow capture interfaces.
To check if you driver associated with your "SvideoToUsb device", implements those interfaces or not,
you can use "graphedit" (you can find it on the web).
Then if you see your device in "Video Capture Device" category, then it should be ok.

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
thanks for the tips. I actually already use the winbuilds binaries, so I got this one (though I'm on winbuild version 0.10.2, not 0.10.3).
However, I cannot see my grabber input with it. It works fine with a simple usb webcam, but looks like the Svideo to USB grabber is not handled the same way, pitty...

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 11h53mn 54s
Objet : Re: [gst-devel] Grabbing analog video source with gstreamer

Hi,

You can try dshowvideosrc from there:

http://www.gstreamer-winbuild.ylatuya.es/doku.php?id=download

which is different from the one who is in gst-plugins-bad

see http://bugzilla.gnome.org/show_bug.cgi?id=517203 for more informations.

Julien

2009/7/8 Philip Jägenstedt <[hidden email]>

I've done capture with GStreamer using v4l2src, but if you're on XP
have a look at http://asabil.wordpress.com/2007/05/20/directshowvideosrc-for-gstreamer/
Apparently it's dshowsrcwrapper in gst-plugins-bad.

Philip

On Wed, Jul 8, 2009 at 14:41, Albert Costa<[hidden email]> wrote:
> Hi,
> I would like to know if anyone has already used GStreamer to get video from
> an analog source? For some reasons, I may have to use a S-Video camera for a
> project. So I'll need to get the video from it. Has anyone experienced using
> gst with a frame grabber ? (btw, I'm under winXP)
> I've tried a S-Video to USB converter, but I cannot see which plugin I could
> use : ksvideosrc does not see it.
> Any help or advice would be welcomed,
> Regards,
> Al
>

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>

--
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Julien Isorce

Re: Re : Re : Re : Re : Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/20 Albert Costa <[hidden email]>

Hi Julien,
unfortunately, that doesn't work. As soon as I remove the link from the x-bar to the analog capture element, trying to play fails with 'no connected device' message.

Regards,
Al

Ok.
The crossbar filter is added automatically when clicking on "render pin" on the capture filter 's ouput pin in graphedit ?

According to : http://msdn.microsoft.com/en-us/library/dd390991(VS.85).aspx
the crossbar is automatically added by the CaptureGraphBuilder2

But dshowvideosrc does not uses CaptureGraphBuilder2.

If you are directshow friendly and if you are able to compile dshowvideosrc, then you could try to
create the capturegraphbuilder2 then use SetFilterGraph on it to set the FilterGraph instance.
Then it should work.

It's just a matter of few code lines.

You are just entering in the directshow hell

Julien

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>

Envoyé le : Lundi, 20 Juillet 2009, 11h39mn 11s
Objet : Re: [gst-devel] Re : Re : Re : Re : Re : Re : Grabbing analog video source with gstreamer

hmm, could you try to create again the same graph than the one in the screenshot.
But, just before to click on play, try to disconnect the crossbar from the capture filtre.
Then click play and tell me if that works.

if yes, try to do the same steps, except you just remove the crossbar before to play.

If that works, it means that there is no default "route" and so a physical input has to be set before to play the graph.

Julien

2009/7/20 Julien Isorce <[hidden email]>
Hi,

First, the" missing" element you was talking about is a classic "crossbar" directshow filter.
Drivers of capture devices that contain a tuner, usually implement the crossbar interface.
So it's not something weird.

Second, the not normal thing is that the capture filter needs to be connected to the crossbar in order to start.
(and that's why you got "not connected device")

I have no tuner capture device here so I cannot send you a screenshot.

Well, it should have a way to avoid the use of the crossbar filter.

Julien

2009/7/17 Albert Costa <[hidden email]>

Hi,
I send the screenshot of the working graph. As you can see (and as I explained in my last post), it needs 2 elements to capture the source, which is why the dshowvideosrc element cannot work with this device (because it only expects/adds one element).

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>

Envoyé le : Vendredi, 17 Juillet 2009, 17h18mn 27s
Objet : Re: [gst-devel] Re : Re : Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/17 Albert Costa <[hidden email]>

Hi Julien,
thanks for your patient help! I've followed your advice. I have connected the graphedit to the running thread of virtualdub acquisition, so I have seen the full graph running.

ok cool

There was a missing element when I tried previously to build the chain myself. So now I'm also able to grab from graphedit, using the correct elements.

What was exactly the missing element ? could you send us a screenshot ?
right click on the output pin, then "render pin" does not insert this element ?

Now, from the gstreamer point of view, how can I know which elements the plugin really tries to put in the graph? (and yes, the reported error means 'no connected device').

dshowvideosrc just builds a directshow graph that contains a "video capture source filter" and
a "custom directshow fakesink filter" (this fakesink has nothing to deal with the gstreamer one, and you cannot instanciate it in graphedit)

But this "custom directshow fakesink filter" accepts any pin caps.

So the following should works:

gst-launch-0.10 dshowvideosrc device-name="your device name that you see in graphedit in video capture source category" ! fakesink

Any infos on the missing element that resolved the "no connected device" may help.

Have you also tried to update the driver of you device ?

Julien

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>

Envoyé le : Vendredi, 17 Juillet 2009, 15h42mn 42s
Objet : Re: [gst-devel] Re : Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/17 Albert Costa <[hidden email]>

Hi again,
I've moved a bit forward, but not enought yet to achieve grabbing with gstreamer. First thing I did was to check I could acquire from WinMovieMaker, and that worked. I even successed with virtualdub.

ok but still does not work with graphedit ? if yes this is really strange. You have to figure out what is going on because dshowvideosrc builds a directshow graph as graphedit does.

Then I noticed was that my grabber source was emiting in YUY2 format. When I gst-inspected my dshowvideosrc I realized it was not a supported format (was version 0.10.10), which explained the 'could not link elements' message I had with a simple dshowvideosrc ! fakesink pipeline.

I have installed latest winbuilds version (now 0.10.4-prerelease). This one handles YUY2. But now I get a new error "gstdshowvideosrc.c:653:gst_dshowvideosrc_change_state: Can't RUN the directshow capture graph (error=-2147023729)"

I think this is the same error as you got in graphedit ("device not connected")

I have tried to check on the web possible problems, but found nothing relevant. Only thing was to check directx version, and I have 9.0c.
It feels frustrating to see all components but gstreamer able to acquire my video...

You could report the graphedit problem to the device company. They often uses it.
If you resolve the graphedit pb then dshowvideosrc will work. That's all I can do without having the device in my hands.

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>

Envoyé le : Jeudi, 16 Juillet 2009, 15h32mn 55s
Objet : Re: [gst-devel] Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/16 Albert Costa <[hidden email]>

In graphedit, the property page for the element shows video decoder options (mainly PAL and SECAM formats). The output pin also reports the decoder options, plus the image format.

And if I connect a video renderer and try to play, it says no peripheral is connected.

So it's not a GStreamer problem.

There is a software provided with the hardware, I tested it at home it did allow the grabbing. But I don't know if there's a way to use the hw without the sw...

From my experience, if you can see the hw in graphedit then you can use it without the sw. If not, you can't.

Try to grab using "Window Movie Maker" that is installed by default on winxp
(select "capture from video device")

Regards,
Al

Julien

De : Julien Isorce <[hidden email]>

À : Gstreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 17h12mn 45s
Objet : Re: [gst-devel] Re : Re : Grabbing analog video source with gstreamer

(reply to the gst list)

Note that you should have the same error doing:

set GST_DEBUG=1
gst-launch dshowvideosrc ! fakesink

About the reason of the error, you should have this error only if you disconnect the usb link.

-->Anything with right bouton on the capture filter in graphedit, to open the property page ?
-->property page on the ouput pin ?
-->Is there a software joined to the device ? does it work ?

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
ok it does appear in the list. I wanted to add a renderer and see if it plays, but...
Problem is then that it does not see that I have a source physically connected to it. I guess that's also why gstreamer plugin does not recognize it.
See attached pict.
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 14h51mn 42s
Objet : Re: [gst-devel] Re : Grabbing analog video source with gstreamer

dshowvideosrc handles a capture device only if the device driver implements the directshow capture interfaces.
To check if you driver associated with your "SvideoToUsb device", implements those interfaces or not,
you can use "graphedit" (you can find it on the web).
Then if you see your device in "Video Capture Device" category, then it should be ok.

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
thanks for the tips. I actually already use the winbuilds binaries, so I got this one (though I'm on winbuild version 0.10.2, not 0.10.3).
However, I cannot see my grabber input with it. It works fine with a simple usb webcam, but looks like the Svideo to USB grabber is not handled the same way, pitty...

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 11h53mn 54s
Objet : Re: [gst-devel] Grabbing analog video source with gstreamer

Hi,

You can try dshowvideosrc from there:

http://www.gstreamer-winbuild.ylatuya.es/doku.php?id=download

which is different from the one who is in gst-plugins-bad

see http://bugzilla.gnome.org/show_bug.cgi?id=517203 for more informations.

Julien

2009/7/8 Philip Jägenstedt <[hidden email]>

I've done capture with GStreamer using v4l2src, but if you're on XP
have a look at http://asabil.wordpress.com/2007/05/20/directshowvideosrc-for-gstreamer/
Apparently it's dshowsrcwrapper in gst-plugins-bad.

Philip

On Wed, Jul 8, 2009 at 14:41, Albert Costa<[hidden email]> wrote:
> Hi,
> I would like to know if anyone has already used GStreamer to get video from
> an analog source? For some reasons, I may have to use a S-Video camera for a
> project. So I'll need to get the video from it. Has anyone experienced using
> gst with a frame grabber ? (btw, I'm under winXP)
> I've tried a S-Video to USB converter, but I cannot see which plugin I could
> use : ksvideosrc does not see it.
> Any help or advice would be welcomed,
> Regards,
> Al
>

> ------------------------------------------------------------------------------
> Enter the BlackBerry Developer Challenge
> This is your chance to win up to $100,000 in prizes! For a limited time,
> vendors submitting new applications to BlackBerry App World(TM) will have
> the opportunity to enter the BlackBerry Developer Challenge. See full prize
> details at: http://p.sf.net/sfu/Challenge
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>

--
Philip Jägenstedt

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Albert Costa

Re : Re : Re : Re : Re : Re : Re : Re : Grabbing analog video source with gstreamer

Hi,

nope, the xbar is not added automatically when rendering the pin. It only creates the videorenderer, but not the crossbar (and there no 'render pin' option for the analog input pin). I've downloaded the whole winbuilds source&project files, and I'm able to recompile the complete gstreamer. So in theory I can modify the dshow plugin (I started by ading some log lines, it works...). But I'm not an expert (not yet dx friendly as you say :-) ), so I'm sure I want to step ahead in that hell...

Regards,

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Lundi, 20 Juillet 2009, 15h30mn 32s
Objet : Re: [gst-devel] Re : Re : Re : Re : Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/20 Albert Costa <[hidden email]>

Hi Julien,
unfortunately, that doesn't work. As soon as I remove the link from the x-bar to the analog capture element, trying to play fails with 'no connected device' message.

Regards,
Al

Julien

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>

Envoyé le : Lundi, 20 Juillet 2009, 11h39mn 11s
Objet : Re: [gst-devel] Re : Re : Re : Re : Re : Re : Grabbing analog video source with gstreamer

hmm, could you try to create again the same graph than the one in the screenshot.
But, just before to click on play, try to disconnect the crossbar from the capture filtre.
Then click play and tell me if that works.

if yes, try to do the same steps, except you just remove the crossbar before to play.

If that works, it means that there is no default "route" and so a physical input has to be set before to play the graph.

Julien

2009/7/20 Julien Isorce <[hidden email]>
Hi,

First, the" missing" element you was talking about is a classic "crossbar" directshow filter.
Drivers of capture devices that contain a tuner, usually implement the crossbar interface.
So it's not something weird.

Second, the not normal thing is that the capture filter needs to be connected to the crossbar in order to start.
(and that's why you got "not connected device")

I have no tuner capture device here so I cannot send you a screenshot.

Well, it should have a way to avoid the use of the crossbar filter.

Julien

2009/7/17 Albert Costa <[hidden email]>

Hi,
I send the screenshot of the working graph. As you can see (and as I explained in my last post), it needs 2 elements to capture the source, which is why the dshowvideosrc element cannot work with this device (because it only expects/adds one element).

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>

Envoyé le : Vendredi, 17 Juillet 2009, 17h18mn 27s
Objet : Re: [gst-devel] Re : Re : Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/17 Albert Costa <[hidden email]>

Hi Julien,
thanks for your patient help! I've followed your advice. I have connected the graphedit to the running thread of virtualdub acquisition, so I have seen the full graph running.

ok cool

There was a missing element when I tried previously to build the chain myself. So now I'm also able to grab from graphedit, using the correct elements.

What was exactly the missing element ? could you send us a screenshot ?
right click on the output pin, then "render pin" does not insert this element ?

Now, from the gstreamer point of view, how can I know which elements the plugin really tries to put in the graph? (and yes, the reported error means 'no connected device').

dshowvideosrc just builds a directshow graph that contains a "video capture source filter" and
a "custom directshow fakesink filter" (this fakesink has nothing to deal with the gstreamer one, and you cannot instanciate it in graphedit)

But this "custom directshow fakesink filter" accepts any pin caps.

So the following should works:

gst-launch-0.10 dshowvideosrc device-name="your device name that you see in graphedit in video capture source category" ! fakesink

Any infos on the missing element that resolved the "no connected device" may help.

Have you also tried to update the driver of you device ?

Julien

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>

Envoyé le : Vendredi, 17 Juillet 2009, 15h42mn 42s
Objet : Re: [gst-devel] Re : Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/17 Albert Costa <[hidden email]>

Hi again,
I've moved a bit forward, but not enought yet to achieve grabbing with gstreamer. First thing I did was to check I could acquire from WinMovieMaker, and that worked. I even successed with virtualdub.

ok but still does not work with graphedit ? if yes this is really strange. You have to figure out what is going on because dshowvideosrc builds a directshow graph as graphedit does.

Then I noticed was that my grabber source was emiting in YUY2 format. When I gst-inspected my dshowvideosrc I realized it was not a supported format (was version 0.10.10), which explained the 'could not link elements' message I had with a simple dshowvideosrc ! fakesink pipeline.

I have installed latest winbuilds version (now 0.10.4-prerelease). This one handles YUY2. But now I get a new error "gstdshowvideosrc.c:653:gst_dshowvideosrc_change_state: Can't RUN the directshow capture graph (error=-2147023729)"

I think this is the same error as you got in graphedit ("device not connected")

I have tried to check on the web possible problems, but found nothing relevant. Only thing was to check directx version, and I have 9.0c.
It feels frustrating to see all components but gstreamer able to acquire my video...

You could report the graphedit problem to the device company. They often uses it.
If you resolve the graphedit pb then dshowvideosrc will work. That's all I can do without having the device in my hands.

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>

Envoyé le : Jeudi, 16 Juillet 2009, 15h32mn 55s
Objet : Re: [gst-devel] Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/16 Albert Costa <[hidden email]>

In graphedit, the property page for the element shows video decoder options (mainly PAL and SECAM formats). The output pin also reports the decoder options, plus the image format.

And if I connect a video renderer and try to play, it says no peripheral is connected.

So it's not a GStreamer problem.

There is a software provided with the hardware, I tested it at home it did allow the grabbing. But I don't know if there's a way to use the hw without the sw...

From my experience, if you can see the hw in graphedit then you can use it without the sw. If not, you can't.

Try to grab using "Window Movie Maker" that is installed by default on winxp
(select "capture from video device")

Regards,
Al

Julien

De : Julien Isorce <[hidden email]>

À : Gstreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 17h12mn 45s
Objet : Re: [gst-devel] Re : Re : Grabbing analog video source with gstreamer

(reply to the gst list)

Note that you should have the same error doing:

set GST_DEBUG=1
gst-launch dshowvideosrc ! fakesink

About the reason of the error, you should have this error only if you disconnect the usb link.

-->Anything with right bouton on the capture filter in graphedit, to open the property page ?
-->property page on the ouput pin ?
-->Is there a software joined to the device ? does it work ?

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
ok it does appear in the list. I wanted to add a renderer and see if it plays, but...
Problem is then that it does not see that I have a source physically connected to it. I guess that's also why gstreamer plugin does not recognize it.
See attached pict.
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 14h51mn 42s
Objet : Re: [gst-devel] Re : Grabbing analog video source with gstreamer

dshowvideosrc handles a capture device only if the device driver implements the directshow capture interfaces.
To check if you driver associated with your "SvideoToUsb device", implements those interfaces or not,
you can use "graphedit" (you can find it on the web).
Then if you see your device in "Video Capture Device" category, then it should be ok.

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
thanks for the tips. I actually already use the winbuilds binaries, so I got this one (though I'm on winbuild version 0.10.2, not 0.10.3).
However, I cannot see my grabber input with it. It works fine with a simple usb webcam, but looks like the Svideo to USB grabber is not handled the same way, pitty...

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 11h53mn 54s
Objet : Re: [gst-devel] Grabbing analog video source with gstreamer

Hi,

You can try dshowvideosrc from there:

http://www.gstreamer-winbuild.ylatuya.es/doku.php?id=download

which is different from the one who is in gst-plugins-bad

see http://bugzilla.gnome.org/show_bug.cgi?id=517203 for more informations.

Julien

2009/7/8 Philip Jägenstedt <[hidden email]>

I've done capture with GStreamer using v4l2src, but if you're on XP
have a look at http://asabil.wordpress.com/2007/05/20/directshowvideosrc-for-gstreamer/
Apparently it's dshowsrcwrapper in gst-plugins-bad.

Philip

On Wed, Jul 8, 2009 at 14:41, Albert Costa<[hidden email]> wrote:
> Hi,
> I would like to know if anyone has already used GStreamer to get video from
> an analog source? For some reasons, I may have to use a S-Video camera for a
> project. So I'll need to get the video from it. Has anyone experienced using
> gst with a frame grabber ? (btw, I'm under winXP)
> I've tried a S-Video to USB converter, but I cannot see which plugin I could
> use : ksvideosrc does not see it.
> Any help or advice would be welcomed,
> Regards,
> Al
>

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Julien Isorce

Re: Re : Re : Re : Re : Re : Re : Re : Re : Grabbing analog video source with gstreamer

ok you can try two things in dshowvideosrc.c,:

just replace IID_IFilterGraph by IID_IGraphBuilder
(IGraphBuilder inherit from IFilterGraph)

I think it will not resolve the problem so you also can try:

in dshowvideosrc.c before "hres = CoCreateInstance (&CLSID_FilterGraph, ..."
create first a capture graph builder 2:

HRESULT hr = CoCreateInstance(CLSID_CaptureGraphBuilder2, NULL, 
        CLSCTX_INPROC_SERVER, IID_ICaptureGraphBuilder2, (void**)&pBuild );


then if it fails report an error.


after ""hres = CoCreateInstance (&CLSID_FilterGraph, ..."

do this:

       
pBuild->SetFiltergraph(pGraph);

(other infos:

IGraphBuilder *pGraph = NULL;

ICaptureGraphBuilder2 *pBuild = NULL;

http://msdn.microsoft.com/en-us/library/dd373396(VS.85).aspx
)


++


Julien

2009/7/20 Albert Costa <[hidden email]>

Hi,
nope, the xbar is not added automatically when rendering the pin. It only creates the videorenderer, but not the crossbar (and there no 'render pin' option for the analog input pin). I've downloaded the whole winbuilds source&project files, and I'm able to recompile the complete gstreamer. So in theory I can modify the dshow plugin (I started by ading some log lines, it works...). But I'm not an expert (not yet dx friendly as you say :-) ), so I'm sure I want to step ahead in that hell...

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>

Envoyé le : Lundi, 20 Juillet 2009, 15h30mn 32s
Objet : Re: [gst-devel] Re : Re : Re : Re : Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/20 Albert Costa <[hidden email]>

Hi Julien,
unfortunately, that doesn't work. As soon as I remove the link from the x-bar to the analog capture element, trying to play fails with 'no connected device' message.

Regards,
Al

Ok.
The crossbar filter is added automatically when clicking on "render pin" on the capture filter 's ouput pin in graphedit ?

According to : http://msdn.microsoft.com/en-us/library/dd390991(VS.85).aspx
the crossbar is automatically added by the CaptureGraphBuilder2

But dshowvideosrc does not uses CaptureGraphBuilder2.

If you are directshow friendly and if you are able to compile dshowvideosrc, then you could try to
create the capturegraphbuilder2 then use SetFilterGraph on it to set the FilterGraph instance.
Then it should work.

It's just a matter of few code lines.

You are just entering in the directshow hell

Julien

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>

Envoyé le : Lundi, 20 Juillet 2009, 11h39mn 11s
Objet : Re: [gst-devel] Re : Re : Re : Re : Re : Re : Grabbing analog video source with gstreamer

hmm, could you try to create again the same graph than the one in the screenshot.
But, just before to click on play, try to disconnect the crossbar from the capture filtre.
Then click play and tell me if that works.

if yes, try to do the same steps, except you just remove the crossbar before to play.

If that works, it means that there is no default "route" and so a physical input has to be set before to play the graph.

Julien

2009/7/20 Julien Isorce <[hidden email]>
Hi,

First, the" missing" element you was talking about is a classic "crossbar" directshow filter.
Drivers of capture devices that contain a tuner, usually implement the crossbar interface.
So it's not something weird.

Second, the not normal thing is that the capture filter needs to be connected to the crossbar in order to start.
(and that's why you got "not connected device")

I have no tuner capture device here so I cannot send you a screenshot.

Well, it should have a way to avoid the use of the crossbar filter.

Julien

2009/7/17 Albert Costa <[hidden email]>

Hi,
I send the screenshot of the working graph. As you can see (and as I explained in my last post), it needs 2 elements to capture the source, which is why the dshowvideosrc element cannot work with this device (because it only expects/adds one element).

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>

Envoyé le : Vendredi, 17 Juillet 2009, 17h18mn 27s
Objet : Re: [gst-devel] Re : Re : Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/17 Albert Costa <[hidden email]>

Hi Julien,
thanks for your patient help! I've followed your advice. I have connected the graphedit to the running thread of virtualdub acquisition, so I have seen the full graph running.

ok cool

There was a missing element when I tried previously to build the chain myself. So now I'm also able to grab from graphedit, using the correct elements.

What was exactly the missing element ? could you send us a screenshot ?
right click on the output pin, then "render pin" does not insert this element ?

Now, from the gstreamer point of view, how can I know which elements the plugin really tries to put in the graph? (and yes, the reported error means 'no connected device').

dshowvideosrc just builds a directshow graph that contains a "video capture source filter" and
a "custom directshow fakesink filter" (this fakesink has nothing to deal with the gstreamer one, and you cannot instanciate it in graphedit)

But this "custom directshow fakesink filter" accepts any pin caps.

So the following should works:

gst-launch-0.10 dshowvideosrc device-name="your device name that you see in graphedit in video capture source category" ! fakesink

Any infos on the missing element that resolved the "no connected device" may help.

Have you also tried to update the driver of you device ?

Julien

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>

Envoyé le : Vendredi, 17 Juillet 2009, 15h42mn 42s
Objet : Re: [gst-devel] Re : Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/17 Albert Costa <[hidden email]>

Hi again,
I've moved a bit forward, but not enought yet to achieve grabbing with gstreamer. First thing I did was to check I could acquire from WinMovieMaker, and that worked. I even successed with virtualdub.

ok but still does not work with graphedit ? if yes this is really strange. You have to figure out what is going on because dshowvideosrc builds a directshow graph as graphedit does.

Then I noticed was that my grabber source was emiting in YUY2 format. When I gst-inspected my dshowvideosrc I realized it was not a supported format (was version 0.10.10), which explained the 'could not link elements' message I had with a simple dshowvideosrc ! fakesink pipeline.

I have installed latest winbuilds version (now 0.10.4-prerelease). This one handles YUY2. But now I get a new error "gstdshowvideosrc.c:653:gst_dshowvideosrc_change_state: Can't RUN the directshow capture graph (error=-2147023729)"

I think this is the same error as you got in graphedit ("device not connected")

I have tried to check on the web possible problems, but found nothing relevant. Only thing was to check directx version, and I have 9.0c.
It feels frustrating to see all components but gstreamer able to acquire my video...

You could report the graphedit problem to the device company. They often uses it.
If you resolve the graphedit pb then dshowvideosrc will work. That's all I can do without having the device in my hands.

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>

Envoyé le : Jeudi, 16 Juillet 2009, 15h32mn 55s
Objet : Re: [gst-devel] Re : Re : Re : Grabbing analog video source with gstreamer

2009/7/16 Albert Costa <[hidden email]>

In graphedit, the property page for the element shows video decoder options (mainly PAL and SECAM formats). The output pin also reports the decoder options, plus the image format.

And if I connect a video renderer and try to play, it says no peripheral is connected.

So it's not a GStreamer problem.

There is a software provided with the hardware, I tested it at home it did allow the grabbing. But I don't know if there's a way to use the hw without the sw...

From my experience, if you can see the hw in graphedit then you can use it without the sw. If not, you can't.

Try to grab using "Window Movie Maker" that is installed by default on winxp
(select "capture from video device")

Regards,
Al

Julien

De : Julien Isorce <[hidden email]>

À : Gstreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 17h12mn 45s
Objet : Re: [gst-devel] Re : Re : Grabbing analog video source with gstreamer

(reply to the gst list)

Note that you should have the same error doing:

set GST_DEBUG=1
gst-launch dshowvideosrc ! fakesink

About the reason of the error, you should have this error only if you disconnect the usb link.

-->Anything with right bouton on the capture filter in graphedit, to open the property page ?
-->property page on the ouput pin ?
-->Is there a software joined to the device ? does it work ?

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
ok it does appear in the list. I wanted to add a renderer and see if it plays, but...
Problem is then that it does not see that I have a source physically connected to it. I guess that's also why gstreamer plugin does not recognize it.
See attached pict.
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 14h51mn 42s
Objet : Re: [gst-devel] Re : Grabbing analog video source with gstreamer

dshowvideosrc handles a capture device only if the device driver implements the directshow capture interfaces.
To check if you driver associated with your "SvideoToUsb device", implements those interfaces or not,
you can use "graphedit" (you can find it on the web).
Then if you see your device in "Video Capture Device" category, then it should be ok.

Julien

2009/7/9 Albert Costa <[hidden email]>

Hi,
thanks for the tips. I actually already use the winbuilds binaries, so I got this one (though I'm on winbuild version 0.10.2, not 0.10.3).
However, I cannot see my grabber input with it. It works fine with a simple usb webcam, but looks like the Svideo to USB grabber is not handled the same way, pitty...

Regards,
Al

De : Julien Isorce <[hidden email]>
À : Discussion of the development of GStreamer <[hidden email]>
Envoyé le : Jeudi, 9 Juillet 2009, 11h53mn 54s
Objet : Re: [gst-devel] Grabbing analog video source with gstreamer

Hi,

You can try dshowvideosrc from there:

http://www.gstreamer-winbuild.ylatuya.es/doku.php?id=download

which is different from the one who is in gst-plugins-bad

see http://bugzilla.gnome.org/show_bug.cgi?id=517203 for more informations.

Julien

2009/7/8 Philip Jägenstedt <[hidden email]>

I've done capture with GStreamer using v4l2src, but if you're on XP
have a look at http://asabil.wordpress.com/2007/05/20/directshowvideosrc-for-gstreamer/
Apparently it's dshowsrcwrapper in gst-plugins-bad.

Philip

On Wed, Jul 8, 2009 at 14:41, Albert Costa<[hidden email]> wrote:
> Hi,
> I would like to know if anyone has already used GStreamer to get video from
> an analog source? For some reasons, I may have to use a S-Video camera for a
> project. So I'll need to get the video from it. Has anyone experienced using
> gst with a frame grabber ? (btw, I'm under winXP)
> I've tried a S-Video to USB converter, but I cannot see which plugin I could
> use : ksvideosrc does not see it.
> Any help or advice would be welcomed,
> Regards,
> Al
>

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