[MEncoder-users] a/v sync problems
jdrukman at gmail.com
Tue Feb 3 02:40:47 CET 2009
Jon Drukman wrote:
> It is falling down a lot on certain .mov files. The most recent
> problematic example are videos taken with the "Photo Booth" app on Mac
> OS. It seems like the video is actually 15fps, but mplayer identifies
> it as something totally random. It plays fine if I just watch the
> original with mplayer, but converting it usually causes the video to run
> too fast.
after a little more investigation, i found a tool called "mediainfo"
which prints more detailed information about the file. all these files
have a variable frame rate, it turns out. using the frame rate as
reported by mediainfo (i'm guessing it's the average frame rate), i can
get videos that more-or-less stay in sync. it's not perfect but it's
way better than before. is there some way to tell mencoder to convert
the variable frame rate input into a constant frame rate output, by
duplicating/dropping frames as necessary? i thought -ofps and -vf
harddup would do that but it doesn't seem to work.
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