Avimux refuses Video Caps

[Nicolas Dufresne]

Le jeudi 21 septembre 2023 à 16:12 +0200, Marianna Smidth Buschle via gstreamer-
devel a écrit :
> You can see in the CAPS in the image that the working pipeline has a 
> colorimetry field, while the other doesn't.
> 
> So I would still suspect that it could be a problem.
> 
> Per suggestions from 
> https://gstreamer-devel.narkive.com/2Yq80E6x/vaapipostproc-and-v4l2sink 
> you can try a videoconvert or a capssetter.
> 
> 
> Otherwise you have to look at the output with: --gst-debug=*:3,GST_CAPS:5
> 
> And look at the CAPS both sides are offering and compare them.

I tested locally, and avidemux bails out on framerate=0/1, since its not
supported, despite the template caps offering it.

regards,
Nicolas

> 
> 
> On 21/09/2023 15.51, gstreamer-devel-request at lists.freedesktop.org wrote:
> > Message: 2
> > Date: Thu, 21 Sep 2023 13:51:22 +0000
> > From: "Sternkopf, Felix"<Felix.Sternkopf at telerob.com>
> > To: Marianna Smidth Buschle<msb at qtec.com>,
> > 	"gstreamer-devel at lists.freedesktop.org"
> > 	<gstreamer-devel at lists.freedesktop.org>
> > Subject: AW: Avimux refuses Video Caps
> > Message-ID:<114836208f974896ae319ad1880f0273 at telerob.com>
> > Content-Type: text/plain; charset="utf-8"
> > 
> > My guess is the framerate. I don?t no why but after the ?h264parse? step the framerate is down to 0/1. My source is an encoded video from a rtspsrc and when I change the encoder from openh264enc to x264enc on the rtsp server it works and the framerate is correctly at 30/1. I have no idea why the framerate drops down to 0/1 after the parsing step.
> > With --gst-debug=*:3,GST_CAPS:5 I cannot find any problems with the colorimetry.
> > 
> > Not working pipeline with openh264enc Encoder on RTSP server side:
> > [cid:image001.png at 01D9ECA3.77154F90]
> > Working pipeline with x264enc Encoder on RTSP server side:
> > [cid:image004.png at 01D9ECA3.77154F90]
> > 
> > 
> > Best Regards,
> > Felix
> > 
> > 
> > 
> > 
> > Von: Marianna Smidth Buschle<msb at qtec.com>
> > Gesendet: Donnerstag, 21. September 2023 14:17
> > An:gstreamer-devel at lists.freedesktop.org
> > Cc: Sternkopf, Felix<Felix.Sternkopf at telerob.com>
> > Betreff: Re: Avimux refuses Video Caps
> > 
> > 
> > My first guess is problems with the colorimetry, I had issues with other plugins.
> > 
> > 
> > 
> > You can try debugging further with: --gst-debug=*:3,GST_CAPS:5
> > 
> > So you can pin point what parts of the CAPS is going wrong.
> > 
> > 
> > 
> > In some situations a 'h264parse' might help.
> > 
> > 
> > 
> > Best Regards
> > 
> > Marianna
> > On 21/09/2023 14.00,gstreamer-devel-request at lists.freedesktop.org<mailto:gstreamer-devel-request at lists.freedesktop.org>  wrote:
> > 
> > Hey guys,
> > 
> > i developed a pipeline with two parallel streams which are combined in a muxer. There is one audio stream and one video stream. My problem is, that the GstAviMux refuses the following videocaps:
> > 
> > video/x-h264,
> > 
> >              stream-format=(string)byte-stream,
> > 
> >              alignment=(string)au,
> > 
> >              width=(int)1280,
> > 
> >              height=(int)720,
> > 
> >              framerate=(fraction)0/1,
> > 
> >              chroma-format=(string)4:2:0,
> > 
> >              bit-depth-luma=(uint)8,
> > 
> >              bit-depth-chroma=(uint)8,
> > 
> >              parsed=(boolean)true,
> > 
> >              profile=(string)constrained-baseline,
> > 
> >              level=(string)3.1
> > 
> > 
> > 
> > As i understand the documentation of the GstAviMux element, it should accept this caps. Is there any ideas for this problem?
> > 
> > 
> > 
> > Kind regards,
> > 
> > Felix Sternkopf
> > 
> > --
> > 
> > Best regards / Med venlig hilsen
> > 
> > ?Marianna Smidth Buschle?
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