what's the cause of this a/v desync?

[jaysison]

i converted an avi to svcd with dvd2svcd and d2sroba with cinema craft encoder. i wanted to do the muxing and pulldown manually so i decided to quit dvd2svcd after encoding the video and audio. i used pulldown.exe as dvd2svcd normally does and muxed the video with the audio with bbmpeg. the problem is the movie plays on as normal but at one point the movie becomes blocky and distorted and it goes out of sync till the end of the movie.

[ZippyP.]

Sounds like bad frames...link below.

[jaysison]

there seems to be an analyzing stage in dvd2svcd and i don't know the purpose of this. the only reason im doing it manually is because after the pulldown stage using d2sroba, i exited it and put it back on recover but its back to video encoding. i dont know what happens but i also tried other movies but the same thing happens.