[MPlayer-users] Re: Question on "trans-coding" with mencoder...
Rainer Hantsch
rainer at hantsch.co.at
Wed Aug 20 07:40:55 CEST 2003
Hi!
I let a conversion run over night as you recommended:
1. Concatenating both parts into one big mpg file
cat part1.mpg part2.mpg > complete.mpg
2. Extracting the audio track as-is (because it is already MP3):
mencoder complete.mpg -ovc frameno -oac copy -o frameno.avi
3. Doing the first pass of video conversion:
mencoder $ori -oac copy -ovc lavc \
-lavcopts vcodec=mpeg4:vpass=1:vbitrate=2100 \
-o /dev/null -vop scale=720:540 -sws 2
4. Doing the second pass of video conversion:
mencoder $ori -oac copy -ovc lavc \
-lavcopts vcodec=mpeg4:vpass=2:vbitrate=2100 \
-o final.avi -vop scale=720:540 -sws 2
What I got is an AVI file which can be played with gmplayer only with option
-idx (otherwise I cannot skip scenes), while XINE can skip forward/backward
without problems.
But as I experienced with other similar done conversions too, it happens
with some files that synchronization is lost when the point of concatenation
is reached.
Is the above procedure (about how I convert) correct, or should I do something
different?
mfg
Ing. Rainer Hantsch
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