[Ffmpeg-devel] About A/V Sync problem after transcoding via FFMPEG

[Sean Zheng]

Hi,
I've transcoded a H.263 V1 Video from FLV by FFMPEG via the following command:

ffmpeg -i flvtest.flv -s 704x576 -f vob -vcodec h263 -acodec mp3 h263pstest.mpg

I use the VOB encapsulation method (MPEG PS),
but I find that the Audio and Video isn't synchronized while playing
the result video.
and the audio is discontinuous.
But if I use the MP4 encapsulation, the Audio and Video is
synchronized while playing the video:

ffmpeg -i flvtest.flv -s 704x576 -f mp4 -vcodec h263 -acodec mp3 h263mp4test.mpg

Any suggestions are highly appreciated.