[MPlayer-users] Problems with cating two DivX AVIs

Kevin Oberman oberman at es.net
Tue Feb 10 00:17:45 CET 2004


Thanks! Worked just fine.

I'd be happy to re-write this bit of the mencoder documantation if there
is a reasonable chance of the MPlayer developers noting it and accepting
it. (Frankly, it would be better to just delete it than to leave it
broken.)
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman at es.net			Phone: +1 510 486-8634

> Date: Sun, 8 Feb 2004 23:22:10 -0500
> From: D Richard Felker III <dalias at aerifal.cx>
> Sender: mplayer-users-bounces at mplayerhq.hu
> 
> On Sun, Feb 08, 2004 at 04:57:12PM -0800, Kevin Oberman wrote:
> > I have looked through the archives and the FAQ and have no ideas as to
> > what is not working, but I take to AVIs with good indices and cat them
> > together as per the instructions in te doc, and the resultant file
> > plays, but not correctly.
> > 
> > Both files were created with nearly identical commands to mencoder:
> > mencoder -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=1500:vqmin=2:vqmax=31:vhq:vpass=1 -oac mp3lame -lameopts abr:br=64 -vop pp=lb,crop=690:474:0:0 -o /dev/null-dvd 1 -chapter 3 && mencoder -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=1500:vqmin=2:vqmax=31:vhq:vpass=2 -oac mp3lame -lameopts abr:br=64 -vop pp=lb,crop=690:474:0:0 -o Title.avi -dvd 1 -chapter 3
> > 
> > mencoder -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=1500:vqmin=2:vqmax=31:vhq:vpass=1 -oac mp3lame -lameopts abr:br=64 -vop pp=lb,crop=690:474:0:0 -o /dev/null-dvd 1 -chapter 2 && mencoder -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=1500:vqmin=2:vqmax=31:vhq:vpass=2 -oac mp3lame -lameopts abr:br=64 -vop pp=lb,crop=690:474:0:0 -o Content.avi -dvd 1 -chapter 2
> > 
> > I then do:
> > cat Title.avi Content.avi | mencoder -noidx -oac copy -ovc copy -o Vid.avi -
> 
> DON'T DO THIS! Instead:
> 
> cat Title.avi Content.avi > temp.avi
> mencoder -forceidx -oac copy -ovc copy -o Vid.avi temp.avi
> rm temp.avi
> 
> MEncoder will not behave well (and in some cases, mostly with mpeg
> files, will desync a/v!!) when it can't seek on the input file.
> 
> Alas, the mencoder docs are absolutely horrible, so it's not your
> fault... :(
> 
> Rich
> 
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