[FFmpeg-trac] #9914(ffplay:new): ffplay fails to play RTSP TCP streams

[FFmpeg]

#9914: ffplay fails to play RTSP TCP streams
-------------------------------------+-------------------------------------
             Reporter:  khuber       |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  ffplay
              Version:  unspecified  |               Resolution:
             Keywords:  tcp RTSP     |               Blocked By:
  streaming                          |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Description changed by khuber:

Old description:

> Newer ffplay versions don't fall back to TCP when playing RTSP streams.
> The last tested version which did a proper fall-back was 4.2.7-0ubuntu0.1
> (e.g. from Ubuntu 20.04). See attached ffplay-ubuntu20.04-works.txt
>
> With newer versions I was unable to play the same TCP stream anymore.
> Failing versions which I've tried:
> - 4.4.2-0ubuntu0.22.04.1 (e.g. from Ubuntu 22.04), see attached ffplay-
> ubuntu22.04-worksnot.txt
> - self-compiled snapshot from Sept 9th (e.g. N-108064-gdb85e01fd7
> compiled on Ubuntu 22.04), see attached ffplay5-not-working-
> snapshot20220908.txt
>
> Reproducing might be hard without having a RTSP camera with TCP stream
> available. I'm happy to provide all possible details.
>
> The IP address:port in the Log is 127.0.0.1:1554 because there is a local
> SSH tunnel to the destination network. But this hasn't been a problem for
> the older version of ffplay and works well on my Ubuntu System with VLC.
>
> Adding the parameter "-rtsp_transport tcp" makes the stream playable
> immediately (tested with above 4.4.2 version).

New description:

 Newer ffplay versions don't fall back to TCP when playing RTSP streams.
 The last tested version which did a proper fall-back was 4.2.7-0ubuntu0.1
 (e.g. from Ubuntu 20.04). See attached ffplay-ubuntu20.04-works.txt

 With newer versions I was unable to play the same TCP stream anymore.
 Failing versions which I've tried:
 - 4.4.2-0ubuntu0.22.04.1 (e.g. from Ubuntu 22.04), see attached ffplay-
 ubuntu22.04-worksnot.txt
 - self-compiled snapshot from Sept 9th (e.g. N-108064-gdb85e01fd7 compiled
 on Ubuntu 22.04), see attached ffplay5-not-working-snapshot20220908.txt

 Reproducing might be hard without having a RTSP camera with TCP stream
 available. I'm happy to provide all possible details.

 The IP address:port in the Log is 127.0.0.1:1554 because there is a local
 SSH tunnel to the destination network. But this hasn't been a problem for
 the older version of ffplay and works well on my Ubuntu System with VLC.

 Adding the parameter "-rtsp_transport tcp" makes the stream playable
 immediately (tested with above 4.4.2 version).

 This bug was initially found in Kodi:
 https://github.com/xbmc/xbmc/issues/21796

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Ticket URL: <https://trac.ffmpeg.org/ticket/9914#comment:1>
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