[mythtv] Choppy performance on Mac Intel builds / scaling issue?

[James Mitchell]

On Sun, Mar 26, 2006 at 12:49:51PM -0800, Todd Ignasiak wrote:
> On 3/26/06, James Mitchell <mitchell at bruteforce.org> wrote:
> > In contrast to some other reports of good 1080i performance
> > via the MMX enabled builds of 0.19, I'm experiencing issues
> > with both 1080i content, and scaled 480i content.
> 
> When you say 'choppy' what do you mean?   Does it momentarily pause
> completely, or just have motion that's not smooth?

It appears to be dropping a lot of frames. Just based on a visual
estimate, I'd say I'm getting maybe 10 fps. The behavior also seems
sort of 'bursty' with some number of decent frames, slowdown,
some number of decent frames, slowdown, etc.

I ran 'mythfrontend -v all' and quite a few of these:

2006-03-26 15:02:05.073 NVP: Audio is 3.3871 frames ahead of video,
doubling video frame interval.

2006-03-26 15:02:05.722 NVP: Video is 5.03039 frames ahead of audio,
dropping frame.

I'm not sure what 'normal' is, though.

> When looking at my performance in Shark, YUV422_UC_ToRGB32BitColorBGRA
> is not even listed.   I'm not sure when / why that comes into play.

What's your display resolution, and what sort of content are you playing
when you _don't_ see the YUV422_UC_ToRGB32BitColorBGRA function?

James