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DV capture saving problems

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Gabriel Duarte

DV capture saving problems

Heyy guys!

I'm having a problem with a program I've built. It is used to capture from DV cameras. Currently, I can capture , but I'd like to save the buffers into a file, using my own functions. When i do it, I get a distorced image, and I don't know what to do anymore...

I'll attach the C program and the result to show you all what's happening!

Thanks!

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dvtest.c (8K) Download Attachment

capture.pnm (1M) Download Attachment

Wim Taymans

Re: DV capture saving problems

On Fri, 2010-01-08 at 15:24 -0200, Gabriel Duarte wrote:
> Heyy guys!
> I'm having a problem with a program I've built. It is used to capture
> from DV cameras. Currently, I can capture , but I'd like to save the
> buffers into a file, using my own functions. When i do it, I get a
> distorced image, and I don't know what to do anymore...
> I'll attach the C program and the result to show you all what's
> happening!

Your application is assuming that the gstreamer buffers contain RGB
video data, which is most likely not the case. In this particular case
you are handling YUV video as if it were RGB and then you get this
messed up png. Maybe you can save YUV or use gstreamer to convert to
RGB.

Wim

> Thanks!
>
>
>
>
>
> --
> Gabriel Duarte
> Linux User #471185
> Rio de Janeiro - RJ
> http://kinuxlinux.org/gabriel_duarte
>
> Phones:
> (55) (21) 9463-7760 /*Mobile*/
> (55) (21) 2464-9302 /*Home*/
> (55) (21) 2529-5080 /*Work*/
>
>
> -----BEGIN GEEK CODE BLOCK-----
> Version: 3.12
> GCS d- s: a--- C++ UL+++ P L++++ E- W+ N++ o++ K++ w---
> O- M- V- PS++ PE++ Y PGP- t++ 5-- X+++ R tv++ b++ DI+ D++
> G++ e+ h* r+ y++++
> ------END GEEK CODE BLOCK------
>
> ------------------------------------------------------------------------------
> This SF.Net email is sponsored by the Verizon Developer Community
> Take advantage of Verizon's best-in-class app development support
> A streamlined, 14 day to market process makes app distribution fast and easy
> Join now and get one step closer to millions of Verizon customers
> http://p.sf.net/sfu/verizon-dev2dev
> _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel

Gabriel Duarte

Re: DV capture saving problems

How I could do that? Using capsfilters?

On Fri, Jan 8, 2010 at 3:38 PM, Wim Taymans <[hidden email]> wrote:

On Fri, 2010-01-08 at 15:24 -0200, Gabriel Duarte wrote:
> Heyy guys!
> I'm having a problem with a program I've built. It is used to capture
> from DV cameras. Currently, I can capture , but I'd like to save the
> buffers into a file, using my own functions. When i do it, I get a
> distorced image, and I don't know what to do anymore...
> I'll attach the C program and the result to show you all what's
> happening!

Your application is assuming that the gstreamer buffers contain RGB
video data, which is most likely not the case. In this particular case
you are handling YUV video as if it were RGB and then you get this
messed up png. Maybe you can save YUV or use gstreamer to convert to
RGB.

Wim

> Thanks!
>
>
>
>
>
> --
> Gabriel Duarte
> Linux User #471185
> Rio de Janeiro - RJ
> http://kinuxlinux.org/gabriel_duarte
>
> Phones:
> (55) (21) 9463-7760 /*Mobile*/
> (55) (21) 2464-9302 /*Home*/
> (55) (21) 2529-5080 /*Work*/
>
>
> -----BEGIN GEEK CODE BLOCK-----
> Version: 3.12
> GCS d- s: a--- C++ UL+++ P L++++ E- W+ N++ o++ K++ w---
> O- M- V- PS++ PE++ Y PGP- t++ 5-- X+++ R tv++ b++ DI+ D++
> G++ e+ h* r+ y++++
> ------END GEEK CODE BLOCK------
>

> ------------------------------------------------------------------------------
> This SF.Net email is sponsored by the Verizon Developer Community
> Take advantage of Verizon's best-in-class app development support
> A streamlined, 14 day to market process makes app distribution fast and easy
> Join now and get one step closer to millions of Verizon customers
> http://p.sf.net/sfu/verizon-dev2dev
> _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel

------------------------------------------------------------------------------
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--
Gabriel Duarte
Linux User #471185
Rio de Janeiro - RJ
http://kinuxlinux.org/gabriel_duarte

Phones:
(55) (21) 9463-7760 /*Mobile*/
(55) (21) 2464-9302 /*Home*/
(55) (21) 2529-5080 /*Work*/

-----BEGIN GEEK CODE BLOCK-----
Version: 3.12
GCS d- s: a--- C++ UL+++ P L++++ E- W+ N++ o++ K++ w---
O- M- V- PS++ PE++ Y PGP- t++ 5-- X+++ R tv++ b++ DI+ D++
G++ e+ h* r+ y++++
------END GEEK CODE BLOCK------

------------------------------------------------------------------------------
This SF.Net email is sponsored by the Verizon Developer Community
Take advantage of Verizon's best-in-class app development support
A streamlined, 14 day to market process makes app distribution fast and easy
Join now and get one step closer to millions of Verizon customers
http://p.sf.net/sfu/verizon-dev2dev
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Wim Taymans

Re: DV capture saving problems

On Fri, 2010-01-08 at 16:00 -0200, Gabriel Duarte wrote:
> How I could do that? Using capsfilters?

Here's an example:

http://cgit.freedesktop.org/gstreamer/gst-plugins-base/tree/tests/examples/snapshot/snapshot.c

Wim

>
> On Fri, Jan 8, 2010 at 3:38 PM, Wim Taymans <[hidden email]>
> wrote:
> On Fri, 2010-01-08 at 15:24 -0200, Gabriel Duarte wrote:
> > Heyy guys!
> > I'm having a problem with a program I've built. It is used
> to capture
> > from DV cameras. Currently, I can capture , but I'd like to
> save the
> > buffers into a file, using my own functions. When i do it, I
> get a
> > distorced image, and I don't know what to do anymore...
> > I'll attach the C program and the result to show you all
> what's
> > happening!
>
>
> Your application is assuming that the gstreamer buffers
> contain RGB
> video data, which is most likely not the case. In this
> particular case
> you are handling YUV video as if it were RGB and then you get
> this
> messed up png. Maybe you can save YUV or use gstreamer to
> convert to
> RGB.
>
> Wim
>
>
> > Thanks!
> >
> >
> >
> >
> >
> > --
> > Gabriel Duarte
> > Linux User #471185
> > Rio de Janeiro - RJ
> > http://kinuxlinux.org/gabriel_duarte
> >
> > Phones:
> > (55) (21) 9463-7760 /*Mobile*/
> > (55) (21) 2464-9302 /*Home*/
> > (55) (21) 2529-5080 /*Work*/
> >
> >
> > -----BEGIN GEEK CODE BLOCK-----
> > Version: 3.12
> > GCS d- s: a--- C++ UL+++ P L++++ E- W+ N++ o++ K++ w---
> > O- M- V- PS++ PE++ Y PGP- t++ 5-- X+++ R tv++ b++ DI+ D++
> > G++ e+ h* r+ y++++
> > ------END GEEK CODE BLOCK------
> >
>
> >
> ------------------------------------------------------------------------------
> > This SF.Net email is sponsored by the Verizon Developer
> Community
> > Take advantage of Verizon's best-in-class app development
> support
> > A streamlined, 14 day to market process makes app
> distribution fast and easy
> > Join now and get one step closer to millions of Verizon
> customers
> > http://p.sf.net/sfu/verizon-dev2dev
> > _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>
>
> ------------------------------------------------------------------------------
> This SF.Net email is sponsored by the Verizon Developer
> Community
> Take advantage of Verizon's best-in-class app development
> support
> A streamlined, 14 day to market process makes app distribution
> fast and easy
> Join now and get one step closer to millions of Verizon
> customers
> http://p.sf.net/sfu/verizon-dev2dev
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>
>
> --
> Gabriel Duarte
> Linux User #471185
> Rio de Janeiro - RJ
> http://kinuxlinux.org/gabriel_duarte
>
> Phones:
> (55) (21) 9463-7760 /*Mobile*/
> (55) (21) 2464-9302 /*Home*/
> (55) (21) 2529-5080 /*Work*/
>
>
> -----BEGIN GEEK CODE BLOCK-----
> Version: 3.12
> GCS d- s: a--- C++ UL+++ P L++++ E- W+ N++ o++ K++ w---
> O- M- V- PS++ PE++ Y PGP- t++ 5-- X+++ R tv++ b++ DI+ D++
> G++ e+ h* r+ y++++
> ------END GEEK CODE BLOCK------
> ------------------------------------------------------------------------------
> This SF.Net email is sponsored by the Verizon Developer Community
> Take advantage of Verizon's best-in-class app development support
> A streamlined, 14 day to market process makes app distribution fast and easy
> Join now and get one step closer to millions of Verizon customers
> http://p.sf.net/sfu/verizon-dev2dev
> _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel

Gabriel Duarte

Re: DV capture saving problems

I could not see where the conversion is done :S

On Fri, Jan 8, 2010 at 4:36 PM, Wim Taymans <[hidden email]> wrote:

On Fri, 2010-01-08 at 16:00 -0200, Gabriel Duarte wrote:
> How I could do that? Using capsfilters?

Here's an example:

http://cgit.freedesktop.org/gstreamer/gst-plugins-base/tree/tests/examples/snapshot/snapshot.c

Wim

>
> On Fri, Jan 8, 2010 at 3:38 PM, Wim Taymans <[hidden email]>
> wrote:
> On Fri, 2010-01-08 at 15:24 -0200, Gabriel Duarte wrote:
> > Heyy guys!
> > I'm having a problem with a program I've built. It is used
> to capture
> > from DV cameras. Currently, I can capture , but I'd like to
> save the
> > buffers into a file, using my own functions. When i do it, I
> get a
> > distorced image, and I don't know what to do anymore...
> > I'll attach the C program and the result to show you all
> what's
> > happening!
>
>
> Your application is assuming that the gstreamer buffers
> contain RGB
> video data, which is most likely not the case. In this
> particular case
> you are handling YUV video as if it were RGB and then you get
> this
> messed up png. Maybe you can save YUV or use gstreamer to
> convert to
> RGB.
>
> Wim
>
>
> > Thanks!
> >
> >
> >
> >
> >
> > --
> > Gabriel Duarte
> > Linux User #471185
> > Rio de Janeiro - RJ
> > http://kinuxlinux.org/gabriel_duarte
> >
> > Phones:
> > (55) (21) 9463-7760 /*Mobile*/
> > (55) (21) 2464-9302 /*Home*/
> > (55) (21) 2529-5080 /*Work*/
> >
> >
> > -----BEGIN GEEK CODE BLOCK-----
> > Version: 3.12
> > GCS d- s: a--- C++ UL+++ P L++++ E- W+ N++ o++ K++ w---
> > O- M- V- PS++ PE++ Y PGP- t++ 5-- X+++ R tv++ b++ DI+ D++
> > G++ e+ h* r+ y++++
> > ------END GEEK CODE BLOCK------
> >
>
> >
> ------------------------------------------------------------------------------
> > This SF.Net email is sponsored by the Verizon Developer
> Community
> > Take advantage of Verizon's best-in-class app development
> support
> > A streamlined, 14 day to market process makes app
> distribution fast and easy
> > Join now and get one step closer to millions of Verizon
> customers
> > http://p.sf.net/sfu/verizon-dev2dev
> > _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>
>
> ------------------------------------------------------------------------------
> This SF.Net email is sponsored by the Verizon Developer
> Community
> Take advantage of Verizon's best-in-class app development
> support
> A streamlined, 14 day to market process makes app distribution
> fast and easy
> Join now and get one step closer to millions of Verizon
> customers
> http://p.sf.net/sfu/verizon-dev2dev
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>
>
> --
> Gabriel Duarte
> Linux User #471185
> Rio de Janeiro - RJ
> http://kinuxlinux.org/gabriel_duarte
>
> Phones:
> (55) (21) 9463-7760 /*Mobile*/
> (55) (21) 2464-9302 /*Home*/
> (55) (21) 2529-5080 /*Work*/
>
>
> -----BEGIN GEEK CODE BLOCK-----
> Version: 3.12
> GCS d- s: a--- C++ UL+++ P L++++ E- W+ N++ o++ K++ w---
> O- M- V- PS++ PE++ Y PGP- t++ 5-- X+++ R tv++ b++ DI+ D++
> G++ e+ h* r+ y++++
> ------END GEEK CODE BLOCK------
> ------------------------------------------------------------------------------
> This SF.Net email is sponsored by the Verizon Developer Community
> Take advantage of Verizon's best-in-class app development support
> A streamlined, 14 day to market process makes app distribution fast and easy
> Join now and get one step closer to millions of Verizon customers
> http://p.sf.net/sfu/verizon-dev2dev
> _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel

------------------------------------------------------------------------------
This SF.Net email is sponsored by the Verizon Developer Community
Take advantage of Verizon's best-in-class app development support
A streamlined, 14 day to market process makes app distribution fast and easy
Join now and get one step closer to millions of Verizon customers
http://p.sf.net/sfu/verizon-dev2dev
_______________________________________________
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