webrtc example: feeding video data from a pipeline

[Anton Pryima]

Hello Guennadi,

Did you manage to run sendonly or sendrecv examples with videotestsrc on
the RPI target?

First of all, you should ensure that examples work. This confirms that you
have all the required plugins at the RPI platform.

After, you should proceed with changing the pipeline.

Best regards,
Anton.

On Sun, Oct 4, 2020 at 10:21 PM Guennadi Liakhovetski <g.liakhovetski at gmx.de>
wrote:

> Hi,
>
> I'm trying to run webrtc examples on a Raspberry Pi by feeding video input
> to gstreamer from a pipeline, written to by a raspivid process. I have
> first tried to run a simple RTP streaming by first starting a listener on
> a PC, then creating a named pipe at /tmp/cam and starting gstreamer per
>
> gst-launch-1.0 -v filesrc location=/tmp/cam ! h264parse ! rtph264pay !
> udpsink host=192.168.1.16 port=9001
>
> and then in a different window
>
> raspivid -t 0 -h 480 -w 640 -fps 25 -hf -b 2000000 -o /tmp/cam
>
> This workd. Gstreamer launches, waiting for data on the pipe and then once
> the camera process starts, streaming kicks off.
>
> Next I tried to achieve the same with sendonly and sendrecv gstreamer
> examples. First I tried to only modify the pipeline command in the source
> by replacing videotestsrc with filesrc like above, this didn't work. I
> also tried integrating starting of the raspivid process from the examples
> by adding a fork() and exec() calls to them. I see that both succeed, but
> streaming doesn't start. What could be the problem and how can I fix it?
>
> Thanks
> Guennadi
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>
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