[mythtv-users] Upgraded to 0.21, video "stutters"

[Michael T. Dean]

<fixed top posting>

On 03/18/2008 07:51 AM, Johnny Russ wrote:
> Sam Varshavchik wrote:
>   
>> I upgraded from 0.20.2, that was working just fine, to 0.21. Now, 
>> randomly, the video appears to "stutter". The best description I can 
>> come up with is that randomly, the next frame is rendered out of 
>> position horizontally, by 16 or 32 pixels. The following frame is 
>> rendered in the right place. This happens frequently, but randomly and 
>> without any apparent pattern. Also, more randomly, a frame appears to 
>> be drawn offseted vertically by one scan line.
>>
>> I'm running X on a PVR-350's framebuffer (using the ivtv X driver). 
>> Should I try switching to a VGA monitor? But, video from 0.20.2 was ok.
> I had problems with video playback when I upgraded to 0.21. My problem 
> sounded a little different, mine would just skip or hang in places. I 
> found out that in 0.21 they changed the way the video is rendered. More 
> CPU intensive methods are used by default. I had to go into TV settings 
> -> Playback. There is a section that allows you to choose which playback 
> method is used based on resolution, etc. I only have a P III at 1 GHz in 
> my box so I had to switch mine from the new settings back to using XvMC 
> and that got things working for me. I am not sure what settings would be 
> appropriate for your box. I believe you can also try ivtv as the primary 
> playback in the same dialog. Good luck.

Just choose the Slim playback profile group if you want 0.20-like rendering.

Mike