webrtc rust sample problem

Mathieu Duponchelle mathieu at centricular.com
Wed Nov 9 12:04:39 UTC 2022


Hey, unfortunately webrtcsink needs a few more logs on the codec
discovery code path to be useful her, can you apply
https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/972/
and try again?

On Wed, 2022-11-09 at 00:11 +0800, Jun Xiao via gstreamer-devel wrote:
> Thanks Mathieu,
> 
> Following is the message with debug log:
> gst-plugins-rs$ GST_DEBUG=webrtcsink:6 gst-launch-1.0 webrtcsink
> name=ws videotestsrc ! ws. audiotestsrc ! ws.
> Setting pipeline to PAUSED ...
> 0:00:00.017416246  7466 0x55655b56c2d0 DEBUG             webrtcsink
> net/webrtc/src/webrtcsink/imp.rs:1192:gstrswebrtc::webrtcsink::imp:<w
> s>
> preparing
> Pipeline is live and does not need PREROLL ...
> Pipeline is PREROLLED ...
> Setting pipeline to PLAYING ...
> New clock: GstSystemClock
> 0:00:00.018513516  7466 0x55655b5fc580 INFO              webrtcsink
> net/webrtc/src/webrtcsink/imp.rs:2260:gstrswebrtc::webrtcsink::imp:<w
> s:video_0>
> Received caps event Caps(Event { ptr: 0x55655b603150, type: "caps",
> seqnum: Seqnum(50), structure: Some(GstEventCaps { caps: (GstCaps)
> video/x-raw, format=(string)ABGR64_LE, width=(int)320,
> height=(int)240, framerate=(fraction)30/1,
> multiview-mode=(string)mono, pixel-aspect-ratio=(fraction)1/1,
> interlace-mode=(string)progressive }) })
> Redistribute latency...
> 0:00:00.028336475  7466 0x55655b5fc5e0 INFO              webrtcsink
> net/webrtc/src/webrtcsink/imp.rs:2260:gstrswebrtc::webrtcsink::imp:<w
> s:audio_0>
> Received caps event Caps(Event { ptr: 0x7f77680034a0, type: "caps",
> seqnum: Seqnum(61), structure: Some(GstEventCaps { caps: (GstCaps)
> audio/x-raw, format=(string)S16LE, layout=(string)interleaved,
> rate=(int)44100, channels=(int)1 }) })
> Redistribute latency...
> 0:00:00.095827060  7466 0x7f776c05aea0 ERROR             webrtcsink
> net/webrtc/src/webrtcsink/imp.rs:2298:gstrswebrtc::webrtcsink::imp:<w
> s>
> error: No caps found for stream video_0
> ERROR: from element /GstPipeline:pipeline0/GstWebRTCSink:ws: There is
> no codec present that can handle the stream's type.
> Additional debug info:
> net/webrtc/src/webrtcsink/imp.rs(2299): gstrswebrtc::webrtcsink::imp
> (): /GstPipeline:pipeline0/GstWebRTCSink:ws:
> Failed to look up output caps: No caps found for stream video_0
> Execution ended after 0:00:00.077864232
> Setting pipeline to NULL ...
> 0:00:00.101370102  7466 0x55655b56c2d0 INFO              webrtcsink
> net/webrtc/src/webrtcsink/imp.rs:1207:gstrswebrtc::webrtcsink::imp:<w
> s>
> unpreparing
> Freeing pipeline ...
> 
> On Tue, Nov 8, 2022 at 11:59 PM Mathieu Duponchelle
> <mathieu at centricular.com> wrote:
> > 
> > Do you have video encoders available on your system? Perhaps try to
> > run
> > with GST_DEBUG=webrtcsink:6 to get more information.
> > 
> > On Tue, 2022-11-08 at 23:54 +0800, Jun Xiao via gstreamer-devel
> > wrote:
> > > Hi,
> > > 
> > > When I tried to run webrtc rust sample in ubuntu 22.04 VM by
> > > following
> > > https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/tree/main/net/webrtc
> > > ,
> > > I met following problem:
> > > 
> > > $gst-launch-1.0 webrtcsink name=ws videotestsrc ! ws.
> > > audiotestsrc !
> > > ws.
> > > Setting pipeline to PAUSED ...
> > > Pipeline is live and does not need PREROLL ...
> > > Pipeline is PREROLLED ...
> > > Setting pipeline to PLAYING ...
> > > New clock: GstSystemClock
> > > Redistribute latency...
> > > Redistribute latency...
> > > 0:00:00.052590872  7339 0x7fb29006b8a0 ERROR            
> > > webrtcsink
> > > net/webrtc/src/webrtcsink/imp.rs:2298:gstrswebrtc::webrtcsink::im
> > > p:<w
> > > s>
> > > error: No caps found for stream video_0
> > > ERROR: from element /GstPipeline:pipeline0/GstWebRTCSink:ws:
> > > There is
> > > no codec present that can handle the stream's type.
> > > Additional debug info:
> > > net/webrtc/src/webrtcsink/imp.rs(2299):
> > > gstrswebrtc::webrtcsink::imp
> > > (): /GstPipeline:pipeline0/GstWebRTCSink:ws:
> > > Failed to look up output caps: No caps found for stream video_0
> > > Execution ended after 0:00:00.036349323
> > > Setting pipeline to NULL ...
> > > Freeing pipeline ...
> > > 
> > > Could anyone share any suggestions?
> > > Thanks,
> > > Jun


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