webrtcbin - adding video stream after connection

[Anton Pryima]

Hello Rob.

I've faced with same issue some time back (16/17 versions), and found, that
gstreamer's webrtcbin did not fully support the re-negotiation process.
I'm not working with this anymore, but I didn't heard that this support was
added. I may be wrong, Matthew Waters, can you confirm?

Best regards,
Anton Pryima.

On Fri, Oct 1, 2021 at 7:11 PM Rob Agar via gstreamer-devel <
gstreamer-devel at lists.freedesktop.org> wrote:

> Hi all
>
> Does webrtcbin 1.19.2 allow a sequence like this, adding video after
> connection is established?
>
>    1. open peer connection (with offer from remote browser client)
>    2. wait for signalling to reach stable state
>    3. add new elements to the pipeline supply video to the *webrtcbin*
>    element
>    4. re-negotiate connection by sending new offer to client & wait for
>    answer
>    5. profit
>
> It seems that it should do, but I've had not much success making it work.
> Sometimes the video will appear in the browser client, but at extremely
> low, intermittent 1-5 fps
>
> Also, should adding elements to the pipeline automatically trigger the
> *on-negotiation-needed* event*?*
>
> cheers
> --
>
> *Rob Agar*
> Senior Software Developer
>
> www.engineeredarts.co.uk
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