[mythtv-users] Audio to Video sync 200mS off - HDTV only

[Steve Skarda]

>
>
> I have definitely made improvements on it, and have almost eliminated
> the problem.  I was able to get XvMC working recently on my card
> (interestingly enough, mine specifically didn't work with nvidia driver
> 7676, and only with the latest, 8178, quite contrary to the Myth
> documentation).  That seems to have fixed it for the most part.
> Occasionally it will happen, but it seem to go away if I exit the
> program I am watching and start again.  It is almost like the audio gets
> out of sync, and can't catch up.  Once it is in sync, it seems to be fine.
>
> I am running SVN-fixes, by the way.
>
> Tim
>

I have upgraded to the latest SVN and 8178 Nvidia.   I still have
problems.   I might be narrowing in a bit though.  It appears that for the
most part that standard TV (OTA ATSC) is OK and all HDTV is off.   I think I
could fix the problem if there was a way within playback settings to adjust
all HDTV audio by -200mS.   That would get 95% of programs in the right
place.  It would also be easier to deal with if there was a way to save the
audio sync adjustment rather than having to readjust it after every
commercial skip.  Does anyone have an idea how to do this?   Or better yet,
is there any advice on what might be causing a 200mS audio to video sync
issue on 720p and 1080i OTA programs?
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