[MPlayer-users] Re: mencoder mov to mpeg problems

[Michael Waters]

On Sun, Jan 05, 2003 at 00:16 -0600, Alex Ferrer wrote:
> I am trying to convert a quicktime .mov file to mpeg4
> 
> I am using :
> 
> mencoder test.mov -ovc frameno -o frameno.avi -oac mp3lame -lameopts
> abr:br=128
> 
> Then to get a small test clip I use:
> 
> mencoder -oac copy -o /dev/null -ovc lavc -lavcopts
> vcodec=mpeg4:vbitrate=1000:vhq:vpass=1 -ss 0:20 -endpos 0:30 test.mov
> 
> 
> mencoder -oac copy -o myTestVideo.avi -ovc lavc -lavcopts
> vcodec=mpeg4:vbitrate=1000:vhq:vpass=2 -ss 0:20 -endpos 0:30 test.mov
> 
> 
> at this point when I look at myTestVideo.avi ,  the video *is* there
> (and the audio too) but is all patched on green plus all sorts of
> overlapped  frames. Any ideas?
> 
> BTW, I can see the original .mov perfectly well using mplayer

Hi,

I don't know anything about quicktime and I've never tried converting
qt but for sure -ss and -endpos should be the same for all 3 passes. 
If the audio is vbr, i don't think -ss will work.  If the qt file uses
variable framerates I don't know how you'll be able to convert it
without the video looking disjointed.  You shouldn't see screenfuls of
"Skip frame!" or "Duplicate Frame!".  Maybe -ofps will help.

Michael


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