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  1. Member
    Join Date
    Sep 2004
    Location
    Australia
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    I have a mkv file that uses h264 codec. I used MKVExtractGUI to extract everything. Then I used avc2avi to convert the raw h264 to avi then I merge the audio & video in virtualdub but when I play it the audio is unsync. Why is that?
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  2. I'm a MEGA Super Moderator Baldrick's Avatar
    Join Date
    Aug 2000
    Location
    Sweden
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    Maybe a h264 with variable frame rate(vfr), see https://forum.videohelp.com/viewtopic.php?p=1656988#1656988
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  3. Member
    Join Date
    Apr 2007
    Location
    United States
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    Whenever you have audio sync problems the first thing to check is your fps, are you working with a pal or ntsc video?
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