[mythtv-users] 0.25 Major AV sync problems

[Chris Watson]

I'm getting this issue in the UK, with SD recordings from DVB-T
sources.  As you say, it seems to be more noticeable with 0.25 than it
was with 0.24 - and seems to increase when skipping ads.  I haven't
tried the pause/unpause trick, but it drives me up the wall too!

On 7 June 2012 23:11, Richard <peper03 at yahoo.com> wrote:
> 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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