[MPlayer-users] A/V sync problem when appending AVIs

[Matthias Czapla]

Hello!

I have created three AVI files with (for each one)

mencoder -aid 128 -srate 44100 -oac mp3lame -lameopts cbr:br=112:aq=2 \
-ovc frameno -o frameno.avi -dvd-device some_image.bin dvd://1
for i in 1 2; do
	mencoder -oac copy -ovc lavc \
        -lavcopts vcodec=mpeg4:mbd=2:trell:vbitrate=509:vpass=$i \
	-sws 2 -vf crop=672:316:24:130,scale=544:240 \
	-dvd-device some_image.bin dvd://1
done

Each one plays fine as usual, but when appending them via

cat 1.avi 2.avi 3.avi | mencoder -noidx -oac copy -ovc copy -o bla.avi -

I get A/V desyncronized after the point where the second file starts. Before
that point theres no problem. I already tried to append them with avidemux
but this produced exactly the same result (i.e. A/V desync). I have often
done this before without any problems but this time it strikes me.

Regards
Matthias