Fixes#10504.
There was a bug in FFmpeg implementation which was hidden by a bug in
libsrt; it was fixed in a recent commit [1].
When we ported FFmpeg libsrt.c to obs, we brought the said bug along.
When starting an SRT stream in listener mode, if no connection is made
by a client, there were two issues:
- 1) obs was stuck into a connecting loop,
- 2) the socket was not closed when exiting OBS.
This fixes the issue so that SRT is displaying that a stream started
when in listener mode even if NO client is connected.
This is the correct behaviour for a listener.
The stream now closes properly.
[1] https://git.videolan.org/?p=ffmpeg.git;a=commit;h=87677c2195e86b126c3438439a05d0a46ae5bb50
Signed-off-by: pkv <pkv@obsproject.com>
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