[vlc-devel] Patch to "modules/access/live555.cpp" to fix the recently-discovered RTSP subtitle track problem

Gilles Chanteperdrix gilles.chanteperdrix at xenomai.org
Mon Dec 16 08:11:05 CET 2013

On 12/16/2013 07:54 AM, Gilles Chanteperdrix wrote:
> On 12/16/2013 06:22 AM, Ross Finlayson wrote:
>> Recently Gilles Chanteperdrix reported (on the wrong VLC mailing list
>> :-) that attempting to enable a subtitle track in a RTSP stream would
>> cause VLC (version 2.1) to halt the stream.
> An URL allowing to reproduce the problem is:
> rtsp://xenomai.org:8554/video-tests/hd-fast.mp4
> The stream start playing normally, but when selecting a sub-title track,
> vlc stops.
> The second issue, more serious I believe, I observed with vlc 2.1, is
> that it somehow does not like the RTP jitter even though the RTP packets
> are timestamped.
> It is visible with the following URL:
> rtsp://xenomai.org:8554/video-tests/hd-slow.mp4
> where if you enable the logs you will see that vlc is throwing away a
> lot of frames, despite the fact that their jitter is inferior to the
> jitter buffer time. You can compare with the http stream:
> http://xenomai.org/video-tests/hd-slow.mp4
> To see the difference. The RTP stream is OK from my point of view, vlc
> 2.0 plays it better, and ffmpeg plays it perfectly.

BTW, I have just tried ffmpeg inside vlc to play the stream with:

And it returns an error "No such file or directory". I am using vlc 2.2 git.


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