[mythtv-users] 0.25 Major AV sync problems
Richard
peper03 at yahoo.com
Thu Jun 7 22:11:33 UTC 2012
On 03/06/12 11:25, David Moore wrote:
> Audio/Video sync has not been good for me ever since I upgraded to
> 0.25. But since I haven't seen others complaining I wonder if I have a
> config problem. Here's what I see:
>
> - OSD of Playback Data frequently shows A/V Sync values of around -2
> and never "pulls in" to lower values without user intervention.
> - Actual AV sync is not as bad as -2 seconds but is a large fraction
> of a second.
> - Seeking forwards or backwards almost always degrades AV sync.
> - Pausing/unpausing usually, but not always, helps AV sync.
> - Seeking back to the start of a recording loses sync for a few
> seconds and sometimes never recovers. Audio and/or video may break up.
> Ridiculously huge AV sync values are shown in the OSD and frontend log.
> - After seeking to the start and breaking sync it seems seeking
> forward recovers sync.
>
> So am I the only one seeing this? If so, what is the magic config
> option that I'm missing?
I'm getting this too. Playback data shows A/V sync generally at around
+/-2. Pausing/unpausing usually seems to fix it (A/V sync goes to
something like 0.17). Skipping makes it worse.
I haven't been able to do too much playing around with it but it seems
that even after pausing/unpausing, after a while I notice it's got out
of sync a bit. When I could check, I think A/V sync was showing around 1.x.
I thought it might only be on HD/AC3 content but I think it happens on
SD/MP2 stuff too. All my recordings come in via DVB-S(2).
At least the pause/unpause trick generally seems to work but it doesn't
help the WAF when I have to do it several times during a recording (she
doesn't seem to notice but it drives me up the wall!).
Richard.
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