Sending multiple video streams using webrtcbin

Matthew Waters ystreet00 at
Thu Aug 20 09:18:53 UTC 2020

Yes, in order for webrtcbin to answer with sending two streams, the
original offer must have two streams to receive.

There was also an issue in webrtcbin at some point with multiple similar
streams being confused for each other (at offer/answer creation) that
was fixed a little while ago.  I can't remember the details off the top
of my head though :).


On 20/8/20 11:51 am, Stergios Hetelekides wrote:
> Hi,
> I hope this is an appropriate place to ask webrtcbin questions! :)
> I have a pipeline using webrtcbin successfully sending video to a
> mobile app! It looks something like this:
> myvideosrc -> ... -> webrtcbin
> It's working great for a single video stream, but now I'm trying to
> send multiple video streams using webrtcbin to the mobile app. I've
> tried linking an additional src to my webrtcbin:
> myvideosrc -> ... -> webrtcbin
> videotestsrc -> ... ----^
> When I do this, only 1 stream comes thru to the phone. By looking at
> the SDP answer that webrtcbin is generating, it is only responding
> with 1 stream in the answer. I know both pipelines work individually,
> but I cannot get both streams to come thru at the same time.
> I'm not sure if it's an issue with how the mobile app is sending it's
> offer (does it need to offer to receive 2 streams?), or how I'm
> handling on the webrtcbin side? Any help would be appreciated.
> Thank you!
> _______________________________________________
> gstreamer-devel mailing list
> gstreamer-devel at

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