[mythtv-users] How to improve 720p playback (1080i ok)?

[Jerry Rubinow]

On Mon, Nov 29, 2010 at 11:15 PM, Robert Johnston <anaerin at gmail.com> wrote:

> On 29/11/2010 10:12 PM, Jerry Rubinow wrote:
>
>> I've been fooling around running mythfrontend compiled under Windows,
>> got that working.  I can playback 1080i content without glitches, but
>> 720p content has frequent pauses, due to throwing away frames when the
>> audio gets ahead of the video.
>>
>> In the logs, I've verified it's using Direct3D for playback.  I've tried
>> different minimal profiles, with a deinterlacer of Onefield, Linear
>> Blend, and None (no filters in all cases), with no change in results.
>>  The content that plays fine is 1080i 30Hz, and the content that
>> doesn't is 720p 60Hz.
>>
>> For the 720p content, myth is using in the low 30's % CPU, and for the
>> 1080i, high 30's.  The monitor is 60Hz.
>>
>> Any suggestions?
>>
>
> Try turning off (Or forcing off in the driver's control panel if it's
> already off) vsync. It may be that Myth is just a frame slow, and the driver
> is stopping it from updating late.
>
>
Good thought.  I went into the driver's 3D settings, and set vsync to Force
Off.  Unfortunately, no effect.  OpenGL VSync in myth settings is also
unchecked.  Is there another setting somewhere?

-Jerry
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