[mythtv-users] Judder free playback with mythtv

[belcampo]

Tom Gerrard wrote:
> Just to confirm, should Myth pick the best refresh rate regardless of
> resolution?
> 
> I'm in the UK so recordings are @50hz, but I have a lot of downloaded
> content with different frame rates.
> 
> My TV's native resolution is 1360x768 @60hz, and will accept
> 1280x720 at 50/59.94/60hz.
> 
> I'd prefer the  30fps video to play at the native resolution, but drop
> down to 720p for 25fps content.  I tried the settings from the wiki
> article, but with the 'video output' res set to 1360x768 it won't drop
> down.  Set to 1280x720 it will switch between 50hz/60hz as it should.
> 
> On a side note, do people often encounter A/V sync issues doing this?
> Presumably because the TV is now doing the scaling I get a constant
> lag of about 40ms of video behind audio.
How are you able to determine if sound is 40ms, 1-frame at 25fps, earlier 
than video ?
> 
> Thanks,
> Tom
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