[mythtv-users] Bob deinterlacing drops frames, but not high CPU

[Matt Doran]

Lan Barnes wrote:
> On Thu, May 24, 2007 8:08 pm, Matt Doran wrote:
>   
> -snippage-
>   
>> Once I got that working I enabled bob and opengl vsync, and the result
>> is much smoother playback.
>>
>> -- Matt
>>     
>
> I have to ask how this smoothness expresses itself. I'm considering trying
> bob deinterlacing because I get pixilation of large color blocks on
> panning motion (when a runner takes off for second base, he leaves a Wiley
> Coyote blur behind himself). Is that the sort of thing your change fixed?
>
> Feeling much more like a mere mortal all the time ...
>
>   
:)

This won't fix pixellation.  I think that's more likely to be problem 
with the encoding of the video stream.  It takes more bandwidth to 
transmit a video stream with more changes (like panning)..... so 
depending on the quality of the encoding and the bandwidth, it might 
cause a loss of quality and pixelation.

The smoothness I'm talking about with getting your refresh rate to match 
the frame rate of the broadcast.  If it doesn't match, say if you're 
using 60Hz with a 25 Hz video, some frame will be duplicated... which 
results in a slightly jerky panning.  I also noticed the problem when 
credits were scrolling up the screen.

Matt