RTSP to WEBRTC without h264 transcoding

[evaluat0r]

Marc Leeman wrote
> From experience, you can create a pipeline that takes in whatever data (be
> it RTSP or something else) and send it to a WebRTC element. You don't
> really need to reply to I-Frame requests and such.
> 
> The only trick is that WebRTC has non-standard signalling; so you'll need
> to handle that in some way or you'll need to hardcode about everything you
> can.
> 
> In general, the pipelines I used was something along the lines of
> 
> uridecodebin uri=..... caps="video/x-vp9; video/x-vp8; video/x-h264;
> video/x-h265" ! parser ! payloader ! webrtcsink uri=....
> 
> Of course this was unidirectional.
> 
> By doing this, you could easily send feeds from standard cameras over
> (IIRC) amazon cloud to some browser on a hand held device.
> 
> Unfortunately, management lost interest; and this code is now rotting in
> some git repo :-(
> 
> 
> 
> On Fri, 7 Aug 2020 at 09:00, evaluat0r <

> volatileconst@

> > wrote:
> 
>> pasifus wrote
>> > and what gstreamer pipeline you used?
>> >
>> >
>> >
>> >
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>>
>> I don't think you can do this because if a PLI or intra frame request is
>> made, then you have to respond to that. But RTSP doesn't understand those
>> requests so your webrtc sender would have to decode and encode the h264
>> or
>> vp8 data.
>>
>>
>>
>> --
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> 
> 
> -- 
> g. Marc
> 
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Where the pipeline breaks down is when the bitrate needs to change. You
can't respond to a client's request to lower the bitrate without also
transcoding video.



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