webrtcbin does not emit pad-added signal

[Alexei Golovko]

Sorry, my previous response was not sent to the list.

I have made a rust version with webrtcbin to exclude gst-python problems,
but didn't succeed with it also.
Logs are in https://pastebin.com/raw/E2RmE4Hf, source code in the same gist
https://gist.github.com/le-chat/d74457383b6e821666b90e8d5cebcd38 (main.rs).

вт, 12 июл. 2022 г. в 20:56, Alexei Golovko <alexej.golovko at gmail.com>:

> Yes, I see the same when connecting pad-added before going into PLAYING,
> too.
>
> вт, 12 июл. 2022 г. в 15:50, Michiel Konstapel <michiel at aanmelder.nl>:
>
>> On 09-07-2022 00:37, Alexei Golovko via gstreamer-devel wrote:
>> > I try to connect webrtcbin to Janus with gstreamer 1.20.1 and python
>> > 3.9, but does not receive pad-added signal.
>> >
>> > The code is in
>> >
>> https://gist.github.com/le-chat/d74457383b6e821666b90e8d5cebcd38#file-webrtc_receiver-py
>> > This gist provides full self-contained environment (with Nix or
>> > Docker) and starts Janus server, virtual RTSP camera (used as video
>> > source for Janus) and webrtcbin-based client which tries to connect.
>> >
>> > The handler for pad-added is never called, and I don't understand why.
>> >
>> > The logs are at https://pastebin.com/raw/RsyKBAfM
>> > As i can see, webrtcbin establishes connection and receives many RTP
>> > packets from Janus.
>> >
>> > Regards, Alexei Golovko.
>>
>> My first guess would be that you're adding the signal handler AFTER the
>> pad has already been created, is that possible? I think
>> set-remote-description will trigger the creation of the pad. Or do you
>> see the same happening when you connect the handler before going into
>> PLAYING (uncomment line 35 in your code)?
>>
>> HTH,
>> Michiel
>>
>
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