vp8dec not able to decode webrtc rtp stream

[Thomas Greenwood]

Also I have been doing a number of patches to ensure that this works.  In particular you may encounter https://bugzilla.gnome.org/show_bug.cgi?id=697672 - this generally causes you to see a single frame go through and then need to wait minutes until Chrome decides to send a keyframe.

> From: santoscadenas at gmail.com
> Date: Mon, 1 Apr 2013 09:00:29 +0200
> Subject: Re: vp8dec not able to decode webrtc rtp stream
> To: gstreamer-devel at lists.freedesktop.org
> 
> How are you generating the "unencrypted" WEBRTC stream?. Webrtc is
> normally encrypted, that is why you are getting this error. I've
> developed a plugin that can be used to send/receive webrtc. Currently
> I'm improving it to use a different srtp plugins but the work is not
> finished yet.
> 
> Here is the link.
> 
> https://code.google.com/p/kurento/source/checkout?repo=gst-plugins-webrtc
> 
> Regards.
> 
> 
> 2013/3/8 Saurabh Sabnis <sausab at gmail.com>:
> > Hi,
> >
> > I am trying to capture an unencrypted RTP stream sent using WebRTC.
> > I am using following pipeline to decode the stream:
> >
> > GST_DEBUG=p*:5 gst-launch-1.0 -vvv udpsrc
> > caps="application/x-rtp,media=(string)video,clock-rate=(int)90000,encoding-name=(string)VP8-DRAFT-IETF-01,payload=(int)96"
> > port=56103 ! rtpvp8depay ! vp8dec ! autovideosink
> >
> > and I am getting the following error:
> >
> > "No keyframe, skipping"
> >
> > vp8enc uses VP8-IETF-DRAFT-01. Is WebRTC using a newer version of this draft
> > for encoding? Is that the reason why vp8dec is not able to decode the
> > packets?
> >
> >
> > Thanks and regards,
> > --
> > Saurabh Sabnis
> > Graduate Student
> > College of Computing
> > Georgia Institute of Technology
> > Atlanta, GA 30332-0280
> > ssabnis3 at gatech.edu
> >
> > _______________________________________________
> > gstreamer-devel mailing list
> > gstreamer-devel at lists.freedesktop.org
> > http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
> >
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