Need help with playback of avi container on ARMv7

[Richard Leitner - SKIDATA]

Hi Sebastian

> -----Ursprüngliche Nachricht-----
> Von: Sebastian Dröge [mailto:slomo at circular-chaos.org]
> Gesendet: Montag, 02. September 2013 09:40
> An: Richard Leitner - SKIDATA
> Cc: Discussions specific to using GStreamer on embedded systems
> Betreff: Re: Need help with playback of avi container on ARMv7
> 
> On Mo, 2013-09-02 at 07:19 +0000, Richard Leitner - SKIDATA wrote:
> 
> > > >
> > > > > I'd like to play a file using playbin2.
> > > > > When I start the gst-launch command (see below) a white window
> > > > > pops up on the
> > > screen (for less than a second) and the following output is written to the shell.
> > > > >
> > > > > [...]
> > > > > matchbox-wm: X error warning (0xa00001): BadMatch (invalid
> > > > > parameter
> > > > > attributes) (opcode: 12) [...]
> > > >
> > > > This alone will probably cause the video sink to fail and could
> > > > cause the pipeline to stop. Together with ...
> >
> > Do you have any idea where this error message comes from?
> > I have grepped through all logs, but can't find anything useful.
> 
> The videosink seems to use X11 and something goes wrong with the window and the
> window manager complains about that... or something like that.
> 
> matchbox is the yocto window manager, but this errors should come somewhere out
> of libX11.
> https://www.yoctoproject.org/tools-resources/projects/matchbox
> 

Ok, I'll check that...

> >
> > So here's the gst-launch output with GST_DEBUG set.
> >
> > [...]
> > ERROR: from element /GstPlayBin2:playbin20/GstPlaySink:playsink0: The
> autovideosink element is not working.
> > 0:00:01.474410000  6590    0x251b0 LOG                      omx
> gstomx_base_filter.c:873:pad_event:<omxmpeg4dec0> begin
> > Additional debug info:
> > gst-plugins-base-0.10.36/gst/playback/gstplaysink.c(1396):
> > gen_video_chain (): /GstPlayBin2:playbin20/GstPlaySink:playsin0
> > ERROR: pipeline doesn't want to preroll.
> > Setting pipeline to NULL ...
> > [...]
> 
> This is a different error now, it doesn't even try to create a window any longer but the
> videosink just fails immediately. You can get even more verbose debug logs via
> GST_DEBUG=5, maybe this helps as I don't know which category the interesting
> information could be in... if any at all. Please attach the output of that in a file and not
> include it inline inside the mail :)

Ok, it's a different error because I've forgot to export DISPLAY, sorry :-P
I've attached the output with "GST_DEBUG=omx*:5,openmax*:5" in gst-launch_playbin2_test_avi_debug_output

> 
> > > >
> > > > Also try if one of these commands works without errors, and if it
> > > > doesn't provide debug logs for these too.
> > > >
> > > > gst-launch-0.10 filesrc location=/path/to/file ! avidemux ! queue !
> > > > omxmpeg4dec ! fakesink -v
> > > >
> > > > gst-launch-0.10 filesrc location=/path/to/file ! avidemux ! queue !
> > > > omxmpeg4dec ! queue ! autovideosink -v
> >
> > Hmm... both commandlines say:
> > WARNING: erroneous pipeline: no element "omxmpeg4dec"
> >
> > Same error occurs when I try it with "omxmpeg4dec0" or "omxmp3dec"
> 
> Ah sorry, the name is actually nv_omx_mpeg4dec. Can you retry with that?

Now it starts, but fails with the same error as playbin2 does.
I've attached the output in nv_omx_mpeg4dec_output.

> 
> > > Oh and GStreamer 0.10 is deprecated since some time, as is gst-openmax.
> > > Unfortunately gst-omx (the replacement) does not have support for
> > > audio decoders and a sink yet but that's something that can be
> > > solved without too many problems :)
> >
> > Like mentioned above already: gst-openmax libraries are provided by
> > l4t in my case, so I have to stick with gstreamer 0.10 :-(
> 
> Well, I know people are using gst-omx 1.0 successfully on Tegra boards, but you
> probably won't get any support from NVIDIA for that. However better support from
> the GStreamer community usually.

Thanks & regards,
Richard

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