[PD] pix_film + incrementing frame number = blurring

Iain Mott mott at reverberant.com
Mon Jul 2 23:19:04 CEST 2012

Forgot to mention i'm using Ubuntu 11.10 and the video files are 30 fps
with the codec H.264 / AVC

Also, while sending an "auto 1" message to pix_film gives smooth
playback, the file plays perhaps 30% slow. This doesn't seem to be a CPU
issue as the cpu is running between 20 and 30% while playing the file.


On Mon, 2012-07-02 at 17:14 -0300, Iain Mott wrote:
> Hi list,
> I have a patch that syncs multi-channel audio with video by passing
> frame numbers to pix_film. These frame numbers are generated by the
> audio playback. With HD video however and scenes including smooth
> movements, the image becomes a little jittery and a bit blurred. I tried
> completely disabling the audio but it made no effect. When audio is
> enabled and I run the pix_film with an "auto 1" message, playback is
> excellent. 
> I'll experiment now to see if lip-sync can be maintained without propper
> frame-sync, since my clips have at maximum 3min duration.
> I'm wondering though if anyone else had come across this blurring? 
> I'm using by the way, a heavily butchered version of Hans-Christoph's
> framesync (and an old version of it). However, even if don't use the
> framesync patches and pass a frame count generated with metro and a
> counter at the correct rate of 30fps - the blurring still happens.
> Suggestions most welcome!
> Cheers,
> Iain
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