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no such pad 'video_%04x' in element "tsdemux"

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Maxime Louvel
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no such pad 'video_%04x' in element "tsdemux"

Maxime Louvel
HI,

I'm trying to build the following pipeline with a C application :
gst-launch -e udpsrc port=5000 caps="application/x-rtp, media=video, encoding-name=MP2T-ES" ! rtpmp2tdepay ! mpegtsdemux ! filesink location=videodstRDO.mpeg

when using gst-launch it works fine, but when I use a C application here is the error I get (with GST_DEBUG=3) :
0:00:00.032693078 12164 0x1912010 INFO GST_ELEMENT_PADS gstutils.c:1698:gst_element_link_pads_full: trying to link element tsdemux:(any) to element mpeg2dec:(any)
0:00:00.032735773 12164 0x1912010 INFO GST_ELEMENT_PADS gstelement.c:972:gst_element_get_static_pad: no such pad 'video_%04x' in element "tsdemux"
0:00:00.032759563 12164 0x1912010 INFO GST_ELEMENT_PADS gstutils.c:1216:gst_element_get_compatible_pad:<tsdemux> Could not find a compatible pad to link to mpeg2dec:sink

here is the code I wrote :

...
source = gst_element_factory_make ("udpsrc", "rtpsrc");
rtpdepay = gst_element_factory_make ("rtpmp2tdepay", "rtpdepay");
tsdemux = gst_element_factory_make ("mpegtsdemux", "tsdemux");
sink = gst_element_factory_make ("filesink", "filesink");

g_object_set (source, "port", 5000, NULL);
/* we need to set caps on the udpsrc for the RTP data */
caps = gst_caps_from_string ("application/x-rtp, media=video, encoding-name=MP2T-ES");
g_object_set (source, "caps", caps, NULL);
gst_caps_unref (caps);

g_object_set (sink, "location", "/tmp/video.mpeg", NULL);

/* build pipeline */
gst_bin_add_many (GST_BIN (pipeline), source, rtpdepay, tsdemux, sink, NULL);
if(!gst_element_link_many (source, rtpdepay, tsdemux, sink, NULL))
{
    g_printerr ("Could not link pipeline. \n");
    return -1;
}

when I execute the application, the call to gst_element_link_many fails and the program exit with my error msg.

Do you know what might be wrong ?

thanks,
Max


--
Maxime Louvel
web page : https://sites.google.com/site/mlouvel/
linkedin : http://fr.linkedin.com/in/mlouvel
address : 5400-B ridge oak drive
               Austin, Texas, 78731
               USA


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Emile Semmes
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Re: no such pad 'video_%04x' in element "tsdemux"

Emile Semmes
Hi Maxime,

For mpegtsdemux, you can't link the src pads until they are added. This happens during runtime so you'll need to add a signal handler on the pad-added signal from the mpegtsdemux element. Take a look at section 8.1 of the documentation (http://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/chapter-pads.html) for an example on how this is done. Section 8.1.1 uses oggdemux but the method is the same. In your callback, you can link your pad there. Pay attention to the caps since you don't until later if it's an audio or video track.

HTH,

Emile
--
Emile Semmes
Software Consultant
e6 Group, LLC
Office: (630) 376-0626
www.e6group.com


On 5/22/2012 8:56 AM, Maxime Louvel wrote:
HI,

I'm trying to build the following pipeline with a C application :
gst-launch -e udpsrc port=5000 caps="application/x-rtp, media=video, encoding-name=MP2T-ES" ! rtpmp2tdepay ! mpegtsdemux ! filesink location=videodstRDO.mpeg

when using gst-launch it works fine, but when I use a C application here is the error I get (with GST_DEBUG=3) :
0:00:00.032693078 12164 0x1912010 INFO GST_ELEMENT_PADS gstutils.c:1698:gst_element_link_pads_full: trying to link element tsdemux:(any) to element mpeg2dec:(any)
0:00:00.032735773 12164 0x1912010 INFO GST_ELEMENT_PADS gstelement.c:972:gst_element_get_static_pad: no such pad 'video_%04x' in element "tsdemux"
0:00:00.032759563 12164 0x1912010 INFO GST_ELEMENT_PADS gstutils.c:1216:gst_element_get_compatible_pad:<tsdemux> Could not find a compatible pad to link to mpeg2dec:sink

here is the code I wrote :

...
source = gst_element_factory_make ("udpsrc", "rtpsrc");
rtpdepay = gst_element_factory_make ("rtpmp2tdepay", "rtpdepay");
tsdemux = gst_element_factory_make ("mpegtsdemux", "tsdemux");
sink = gst_element_factory_make ("filesink", "filesink");

g_object_set (source, "port", 5000, NULL);
/* we need to set caps on the udpsrc for the RTP data */
caps = gst_caps_from_string ("application/x-rtp, media=video, encoding-name=MP2T-ES");
g_object_set (source, "caps", caps, NULL);
gst_caps_unref (caps);

g_object_set (sink, "location", "/tmp/video.mpeg", NULL);

/* build pipeline */
gst_bin_add_many (GST_BIN (pipeline), source, rtpdepay, tsdemux, sink, NULL);
if(!gst_element_link_many (source, rtpdepay, tsdemux, sink, NULL))
{
    g_printerr ("Could not link pipeline. \n");
    return -1;
}

when I execute the application, the call to gst_element_link_many fails and the program exit with my error msg.

Do you know what might be wrong ?

thanks,
Max


--
Maxime Louvel
web page : https://sites.google.com/site/mlouvel/
linkedin : http://fr.linkedin.com/in/mlouvel
address : 5400-B ridge oak drive
               Austin, Texas, 78731
               USA



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gstreamer-devel mailing list
[hidden email]
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-- 
--
Emile Semmes
Owner / Software Consultant
e6 Group, LLC
Office: (630) 376-0626
www.e6group.com

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Maxime Louvel
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Re: no such pad 'video_%04x' in element "tsdemux"

Maxime Louvel
thanks Emile,
it works

On Wed, May 23, 2012 at 12:39 PM, Emile Semmes <[hidden email]> wrote:
Hi Maxime,

For mpegtsdemux, you can't link the src pads until they are added. This happens during runtime so you'll need to add a signal handler on the pad-added signal from the mpegtsdemux element. Take a look at section 8.1 of the documentation (http://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/chapter-pads.html) for an example on how this is done. Section 8.1.1 uses oggdemux but the method is the same. In your callback, you can link your pad there. Pay attention to the caps since you don't until later if it's an audio or video track.

HTH,

Emile
--
Emile Semmes
Software Consultant
e6 Group, LLC
Office: <a href="tel:%28630%29%20376-0626" value="+16303760626" target="_blank">(630) 376-0626
www.e6group.com


On 5/22/2012 8:56 AM, Maxime Louvel wrote:
HI,

I'm trying to build the following pipeline with a C application :
gst-launch -e udpsrc port=5000 caps="application/x-rtp, media=video, encoding-name=MP2T-ES" ! rtpmp2tdepay ! mpegtsdemux ! filesink location=videodstRDO.mpeg

when using gst-launch it works fine, but when I use a C application here is the error I get (with GST_DEBUG=3) :
0:00:00.032693078 12164 0x1912010 INFO GST_ELEMENT_PADS gstutils.c:1698:gst_element_link_pads_full: trying to link element tsdemux:(any) to element mpeg2dec:(any)
0:00:00.032735773 12164 0x1912010 INFO GST_ELEMENT_PADS gstelement.c:972:gst_element_get_static_pad: no such pad 'video_%04x' in element "tsdemux"
0:00:00.032759563 12164 0x1912010 INFO GST_ELEMENT_PADS gstutils.c:1216:gst_element_get_compatible_pad:<tsdemux> Could not find a compatible pad to link to mpeg2dec:sink

here is the code I wrote :

...
source = gst_element_factory_make ("udpsrc", "rtpsrc");
rtpdepay = gst_element_factory_make ("rtpmp2tdepay", "rtpdepay");
tsdemux = gst_element_factory_make ("mpegtsdemux", "tsdemux");
sink = gst_element_factory_make ("filesink", "filesink");

g_object_set (source, "port", 5000, NULL);
/* we need to set caps on the udpsrc for the RTP data */
caps = gst_caps_from_string ("application/x-rtp, media=video, encoding-name=MP2T-ES");
g_object_set (source, "caps", caps, NULL);
gst_caps_unref (caps);

g_object_set (sink, "location", "/tmp/video.mpeg", NULL);

/* build pipeline */
gst_bin_add_many (GST_BIN (pipeline), source, rtpdepay, tsdemux, sink, NULL);
if(!gst_element_link_many (source, rtpdepay, tsdemux, sink, NULL))
{
    g_printerr ("Could not link pipeline. \n");
    return -1;
}

when I execute the application, the call to gst_element_link_many fails and the program exit with my error msg.

Do you know what might be wrong ?

thanks,
Max


--
Maxime Louvel
web page : https://sites.google.com/site/mlouvel/
linkedin : http://fr.linkedin.com/in/mlouvel
address : 5400-B ridge oak drive
               Austin, Texas, 78731
               USA



_______________________________________________
gstreamer-devel mailing list
[hidden email]
http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel



-- 
--
Emile Semmes
Owner / Software Consultant
e6 Group, LLC
Office: <a href="tel:%28630%29%20376-0626" value="+16303760626" target="_blank">(630) 376-0626
www.e6group.com

_______________________________________________
gstreamer-devel mailing list
[hidden email]
http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel




--
Maxime Louvel
web page : https://sites.google.com/site/mlouvel/
linkedin : http://fr.linkedin.com/in/mlouvel
address : 5400-B ridge oak drive
               Austin, Texas, 78731
               USA


_______________________________________________
gstreamer-devel mailing list
[hidden email]
http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
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