decklinkaudiosrc pitches an error when extracting 8 channels of audio

[Patrick Cusack]

The following pipeline does work:

gst-launch-1.0 decklinkvideosrc device-number=0 mode=1080p2398 connection=sdi ! queue ! videoconvert ! mkv. decklinkaudiosrc device-number=0 connection=embedded channels=8 ! queue ! audioconvert ! mkv. matroskamux name=mkv ! filesink location=test.mkv sync=false

Perhaps the issue centers around sending 8 channels to the rtpopuspay ?

Thanks,

Patrick

> On Mar 24, 2022, at 3:45 PM, Patrick Cusack via gstreamer-devel <gstreamer-devel at lists.freedesktop.org> wrote:
> 
> I am playing with the meetecho whipclient code https://github.com/meetecho/simple-whip-client <https://github.com/meetecho/simple-whip-client> which wraps an audio and video pipeline into a webrtcbin pipeline
> 
> I can successfully run a pipeline using my deckling video card and extract audio from the embedded sdi only when specifying two channels. When I specify "channels=8” in my audio pipeline, the pipeline fails with the following error. 
> 
> ERROR: from element /GstPipeline:pipeline0/GstDecklinkAudioSrc:decklinkaudiosrc0: Internal data stream error.
> Additional debug info:
> gstbasesrc.c(3072): gst_base_src_loop (): /GstPipeline:pipeline0/GstDecklinkAudioSrc:decklinkaudiosrc0:
> streaming stopped, reason not-negotiated (-4)
> 
> I am sending audio down all 8 channels (even though I intend to only use 6 for multi-opus).
> 
> Can you provide any insights? 
> 
> Thanks,
> 
> Patrick
> 
> 
> 
> Here is the successful pipeline
> 
> gst-launch-1.0  webrtcbin name=sendonly bundle-policy=3  stun-server=stun://stun.l.google.com: <stun://stun.l.google.com>19302  decklinkvideosrc device-number=0 mode=1080p2398 connection=sdi ! videoconvert ! queue min-threshold-time=0 ! vp9enc target-bitrate=4000000 keyframe-max-dist=24 deadline=1 end-usage=1 cpu-used=8 lag-in-frames=0 ! rtpvp9pay pt=100 ssrc=2 ! queue ! application/x-rtp,media=video,encoding-name=VP9,payload=100 ! sendonly. decklinkaudiosrc device-number=0 connection=embedded channels=2 ! audioconvert ! audioresample ! queue ! opusenc ! rtpopuspay pt=111 ssrc=1 ! queue ! application/x-rtp,media=audio,encoding-name=OPUS,payload=111 ! sendonly.
> 
> Setting pipeline to PAUSED ...
> Pipeline is live and does not need PREROLL ...
> Setting pipeline to PLAYING ...
> New clock: GstSystemClock
> Redistribute latency...
> Redistribute latency...
> Redistribute latency...
> ^Chandling interrupt.
> Interrupt: Stopping pipeline ...
> Execution ended after 0:00:02.254698249
> Setting pipeline to PAUSED ...
> Setting pipeline to READY ...
> 
> Here is the failed pipeline
> 
> gst-launch-1.0  webrtcbin name=sendonly bundle-policy=3  stun-server=stun://stun.l.google.com: <stun://stun.l.google.com>19302  decklinkvideosrc device-number=0 mode=1080p2398 connection=sdi ! videoconvert ! queue min-threshold-time=0 ! vp9enc target-bitrate=4000000 keyframe-max-dist=24 deadline=1 end-usage=1 cpu-used=8 lag-in-frames=0 ! rtpvp9pay pt=100 ssrc=2 ! queue ! application/x-rtp,media=video,encoding-name=VP9,payload=100 ! sendonly. decklinkaudiosrc device-number=0 connection=embedded channels=8 ! audioconvert ! audioresample ! queue ! opusenc ! rtpopuspay pt=111 ssrc=1 ! queue ! application/x-rtp,media=audio,encoding-name=OPUS,payload=111 ! sendonly.
> 
> Setting pipeline to PAUSED ...
> Pipeline is live and does not need PREROLL ...
> Setting pipeline to PLAYING ...
> New clock: GstSystemClock
> ERROR: from element /GstPipeline:pipeline0/GstDecklinkAudioSrc:decklinkaudiosrc0: Internal data stream error.
> Additional debug info:
> gstbasesrc.c(3072): gst_base_src_loop (): /GstPipeline:pipeline0/GstDecklinkAudioSrc:decklinkaudiosrc0:
> streaming stopped, reason not-negotiated (-4)
> Execution ended after 0:00:00.098295426
> Setting pipeline to PAUSED ...
> Setting pipeline to READY ...
> Setting pipeline to NULL ...
> Freeing pipeline ...
> 

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