[MPlayer-users] filmdint drops frames?

[D Richard Felker III]

On Tue, Feb 10, 2004 at 11:09:48PM -0500, Frédéric Dupuis wrote:
> Recently I recorded a telecined TV broadcast using mencoder 1.0pre3 with
> filmdint. The image quality was much better, but the A/V sync was
> slightly off at the end (video ahead of audio by about 0.4s after 1
> hour). My theory is that filmdint got confused during the commercials
> and dropped frames once in a while between telecined and non-telecined
> material. This is the first time I've used filmdint; normally I use the
> exact same other options and never get such A/V sync problems.
> 
> Here is the exact command line used:
> 
> mencoder tv:// -tv
> driver=v4l2:device=/dev/video0:width=640:height=480:chanlist=us-cable:normid=1:channel=12:fps=29.97 -fps 29.97 -ofps 23.976 -vf filmdint -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=2500 -oac mp3lame -lameopts cbr:br=112 -o film.avi -frames 110000
> 
> Could my theory be correct, or is there some other cause to this
> problem? Is there a good way to fix this?

Probably some other cause. Unless there's a major bug in filmdint
which causes it to lie about whether it output a frame or not,
mencoder itself should preserve the a/v sync by skipping or
duplicating frames...

Rich