Hello, after having solved one issue, the command mencoder tazg1.mpg -oac faac -faacopts br=98 -ovc lavc -lavcopts vcodec=mpeg4:acodec=libfaac -of lavf -vf scale=320:240 -o taztest.mp4 finally produces a file taztest.mp4 which is a ISO Media, MPEG v4 system, version 1 Can mencoder also produce a ISO Media, MPEG v4 system, version 2 ? Many regards Malte _______________________________________________ MPlayer-users mailing list MPlayer-users@xxxxxxxxxxxx https://lists.mplayerhq.hu/mailman/listinfo/mplayer-users