[vdr] vdr-xine A/V sync problems

Theunis Potgieter theunis.potgieter at gmail.com
Tue Oct 7 23:07:54 CEST 2008

I get the same audio/video sync problems, on recordings too. but it will
happen predictably after advertisements was cut out, it will start to go out
of sync by the first cut. I also noticed that my cpu usage increased and my
system's clock seems to drift into the future.

2.6.24-gentoo-r3 #1 Sun Mar 23 16:04:11 SAST 2008 i686 Intel(R) Pentium(R) 4
CPU 2.40GHz GenuineIntel GNU/Linux

media-video/vdr-1.6.0_p1(21:06:15 25/04/2008)(cmdsubmenu cutterlimit
cutterqueue dolbyinrec dvbplayer jumpplay liemikuutio menuorg noepg
syncearly timerinfo)

unfortunately I cannot upload a sample, since my service provider has set a
limit to my upload speed and causes time outs :(

Klaus mentioned that he can only help, if I try without any patches.


2008/10/7 Reinhold May <Reinhold.May at gmx.de>

> Hi,
>   I'm using vdr  1.6.0  along  with  vdr-xine  0.8.2,  xine-lib
> 1.1.15 and xine-ui 0.99.5 on gentoo.
> Recently, I discovered A/V sync problems on my vdr.
> My family confirms that these problems have  been  there  for  a
> while now.
> So, unfortunately, I can't pinpoint which one of my changes  led
> to the behaviour described as follows:
> Mostly, when I switch  channels,  it  takes  a  while  (I  would
> estimate around a second) for the video and the audio to sync.
> But sometimes, audio and video stay out  of  sync,  then  either
> audio or video or both seem to stop, then, for  a  short  while,
> they stay synced, again, then either  audio  or  video  or  both
> stop, then they get out of sync, and so on...
> This behaviour can occur for recordings as well.
> I could neither find anything peculiar  in  the  xine-ui  stdout
> messages nor in vdr's stdout messages or logs that would explain
> that behaviour.
> Looking for people with similar problems, I fould Simon Baxter's
> problem description from 2008-05-04 on this list.
> He switched from vdr-xine 0.8.2 back to version 0.8.0.
> That seemed to do the trick for me as well. So far, there is no
> alternation between A/V going out of and back into sync anymore.
> Above, I mentioned I had made a few changes:
> At some point I thought, I might reduce channel  switching  time
> by using the syncearly patch.  I tried  this  for  a  while  but
> wasn't really happy with it as it didn't seem to reduce  channel
> switching time significantly and it took much longer  to  change
> audio streams (language  of  a  programme).  So,  eventually,  I
> recompiled vdr without the syncearly patch.
> A lot of things seem to have changed after xine-lib 1.1.8 (which
> is needed for vdr-xine 0.8.0) which I honestly cannot oversee.
> As xine-lib 1.1.8 won't be supported forever, I wanted  to  find
> out what could cause my problems in newer versions.
> So I wanted to ask on this list, if anyone can  pinpoint  me  to
> things I could try out in order  to  fix  this  issue  in  newer
> versions.
> --
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