Hi, I met a problem while transcoding videos. I'm trying to transcode a flv video to H.263 video with the following command: ffmpeg -i test.flv -s 704x576 -f vob -vcodec h263 -acodec mp3 test.mpg But it seems that the result video can't be played correctly, The audio is jittering. can anyone help me for this problem? Thanks a lot.