how to fix mpeg2 with bad timing?

Discussion in 'Amateur Video Production' started by peter, Feb 17, 2005.

  1. peter

    peter Guest

    I borrowed a video from a friend that is in svcd format. However, there is
    something very wrong with it timing wise.

    When I play the file with windows media player (using roxio mpeg2 decoder),
    it plays fine unless I try to move the slider around, in which case it seems
    broken -- sometimes I can't move the video past a certain time, sometimes
    the time jump suddenly, and sometimes the time changes but the video
    continues at the same place, etc. Also, moving the slider usually requires
    waiting a few seconds for the play to find the place to start playing.

    If I play the file with virtualdubmod, then there is obvious lip-sync
    problem after 30 minutes or so.

    At one point I put the video into premiere and cut up and re-align the audio
    to fit the video. Then I exported the audio, re-encode it mp2 and
    re-multiplex it with the original mpeg video. The resulting file plays fine
    in virtualdub, but now when playing with windows media player, there is lip
    sync problem!!

    What is going on? Is there a way to fix the timing in the video portion? I'm
    willing to lip-sync manually using premiere, if I can have an output file
    that plays in both virtualdub and windows media player and can be random
    accessed the slider without delay.
    peter, Feb 17, 2005
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  2. peter

    Ken Maltby Guest

    You could try and fix it by removing the padding and correcting
    the PTS data and GOP Headers with "VideoReDo". Just run it through the "Quickfix" utility if
    you don't need any frame accurate editing.

    Ken Maltby, Feb 17, 2005
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