[MEncoder-users] cutting mpeg-2

[Pawel K]

> > > > I have the mpeg-2 file and want to cut it
> without
> > > > decompressing it. The I-frame cut resolution
> suits
> > > me.
> > > > I use the following command:
> > > > 
> > > > mencoder -ss 0 endpos 10 -ovc copy -oac copy
> > > > source.mpg -o result.mpg
> > > > 
> > > > The result.mpg contains exactly 10 seconds
> from
> > > the
> > > > beginning of the source.mpg.
> > > > 
> > > > I found that a few frames around frame nr 50
> have
> > > > strange rectangles, they are a bit distored.
> > > > 
> > > > I tried to cut the movie in other arbitrary
> > > locations
> > > > and had always the same distored frames at
> around
> > > > 50th.
> > > > 
> > > > How can I cut the movie with mencoder without
> need
> > > to
> > > > decompress it.
> > > > 
> > > > thank You for help.
> > > 
> > > Adding -mc 0 should fix your problem.
> > 
> > Thanks a lot. Indeed it solved the problem :)
> > but I found that 3 first frames are blank, 4th and
> 5th
> > is a bit distorted and the remaining ones are OK.
> > 
> > Doesn't matter whether I cut it at the beginning
> or in
> > the middle of the movie.
> > 
> > I think that's because I use the "-ss <sec>"
> mencoder
> > option to select the cut point.
> 
> Looks like a bug. rc1 does not have this problem.
> 
> > I should cut it at exactly the I-frame.
> > Right ?
> 
> This is exactly what normally happens.
> You don't need to specify "cut at the closest
> I-frame"
> 
> I will try to figure out when the bug was
> introduced.

Thanks a lot.
I'm using version:
mplayer-1.0_rc1_p20070824



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