Jitter / sync problem

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flashpixx
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Jitter / sync problem

Postby flashpixx » 28 Mar 2012 02:27

Hello,

I have build my VLC on a Gentoo x64 unstable Linux with two Xeon CPUs and 16 GB RAM. I would like to run VLC for streaming data form a Hauppauge HVR 1900 (USB) to the network. I have posted the problem on the Gentoo mailinglist
http://www.mail-archive.com/gentoo-user ... 27092.html also.

The problem is, that VLC returns errors like:
[0x6bfa68] main input error: ES_OUT_SET_(GROUP_)PCR is called too late (pts_delay increased to 2329 ms)
[0x6bfa68] main input error: ES_OUT_RESET_PCR called

and the video stream can not be shown, because it run sometimes faster and other times slower or breaks down. If I run a cat /dev/video0 > x.mpg and show the stored MPEG file with VLC on my desktop system, everything is fine, video and audio are in sync, so I don't think that it is a kernel / hardware problem. My primary question is, can I found out why the VLC creates this errors. My next question in this case should be, that I have set the correct VLC compilerflags for my system?

Thanks a lot

Phil

Rémi Denis-Courmont
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Re: Jitter / sync problem

Postby Rémi Denis-Courmont » 28 Mar 2012 08:48

This error happens because VLC buffers underrun. This can happen a few times at startup if the initial caching duration (--live-caching=xxx) is smaller than the jitter of the input.

If it keeps occuring, the input is probably too slow. That said I am not familiar with the PVR plugin.
Rémi Denis-Courmont
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flashpixx
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Re: Jitter / sync problem

Postby flashpixx » 28 Mar 2012 15:35

It seems that a --live-caching=4000 works a little bit better, but on the stream I can't get any audio signal and the video signal shows like a video on the 1930th years (flash light effect).
The same configure has worked with a earlier VLC version


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