webrtc: Padname src_0 is not unique in element webrtcbin0, not adding

Anton Pryima zingfrid at gmail.com
Sat Oct 3 08:49:50 UTC 2020


Hello Matthew,

Thanks for your quick response.

What is the best way to achieve this? Add one more transceiver at the
sending side for the same pipeline? Or I need to create another pipeline
with the same webrtc sink?

Best regards,
Anton.

On Sat, Oct 3, 2020 at 2:16 AM Matthew Waters <ystreet00 at gmail.com> wrote:

> It sounds like you're attempting a renegotiation of the stream format for
> the same mline.  That is currently an entirely unsupported reconfiguration
> scenario :).  For now should add a new stream and remove the old stream if
> you want to change formats.
>
> Cheers
> -Matt
>
> On 3/10/20 4:09 am, Anton Pryima wrote:
>
> Hello all.
>
> I have an issue with the webrtcbin and changing pipes.
> My sender is:
>
> appsrc->parser->payer->webrtcbin
>
> My receiver is:
>
> webrtcbin->depayer->parser->decodebin->autovideosink.
>
> My app source can push 2 kinds of samples: H264 and H265. I start my
> send/recv pipelines on the H264 codec.
> Then, when the pipeline is PLAYING and I have the h265 sample, I put a
> blocking probe and dynamically reconfigure the sending pipe to
> *appsrc->h265parser->h265payer->webrtcbin*. And everything is fine and
> my sending pipe continues working.
> On the receiving side, I've got the signal through the data channel about
> codec change from the sending side and configure my receiving pipeline to*
> webrtcbin->h265depay->h265parse->decodebin->autovideosink*.
> But right after that, I hove:
>  *GStreamer-CRITICAL **: 16:24:34.926: Padname src_0 is not unique in
> element webrtcbin0, not adding*
> Error and frames stop flowing through webrtc src_0 pad.
>
> Can anyone suggest what am I doing wrong and how to resolve this?
>
> Best regards,
> Anton.
>
> _______________________________________________
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>
>
>
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