Fixing av sync prob

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  • BigRizla
    Junior Member
    Junior Member
    • Jun 2004
    • 1

    Fixing av sync prob

    I have a few divx and xvid movies where the audio is out of sync to the video by the same amount all the way through. Is there a program / tool where i can adjuct the a/v sync.
    Many thanks
  • ormonde
    Digital Video Explorer
    • Dec 2003
    • 3735

    #2
    Visit the following link for some helpful information:

    Comment

    • setarip
      Retired
      • Dec 2001
      • 24955

      #3
      A) If the difference between audio and video is constant throughout the video:

      Load the file into VirtualDub, VirtualDubMod, or NanDub.
      Set BOTH "Video"(VirtualDub, VirtualDubMod and NanDub) and "Audio" (VirtualDub and NanDub - VirtualDubMOD>"Streams>"Stream list") to "Direct Stream Copy".
      From the "Audio" dropdown menu, select "Interleaving" (For VirtualDubMOD, rightclick on the listed audiostream and then select "Interleaving")
      Under "Audio skew correction", set an appropriate number of milleseconds (positive or negative) in the box labelled "Delay audio track by"
      Save with a new filename

      B) If the difference increases as the movie plays:

      From under the "Video" dropdown menu, select "Framerate" - and select "Change so video and audio durations match"

      Let us know of your success ;>}

      Comment

      • reboot
        Digital Video Expert
        Digital Video Expert
        • Apr 2004
        • 695

        #4
        B) seldom works, ever.
        Although more involved, progressive sync is fixable.
        Open the avi in virtualdub. Figure out how far out of sync it is at the end of the movie. A rough guess will do at this point.
        Open the avi in Goldwave.
        If the audio is BEHIND of the video, crop some audio from the end of the file.
        If the audio is AHEAD of the video, add some silence to the end of the file.
        Click File, save as, .wav
        Remux the .wav with the avi in virtualdub and check it.
        Adjust as needed in Goldwave.
        Once you're satisfied, you can remux in virtualdub to avi, or simply remux during encoding.
        The same applies to mpegs.
        Demux, adjust audio, save wav, transcode to mp2 in tmpgenc, remux, or if you're doing dvd, remux in your authoring program.
        My DVDLab (and other) Guides

        Comment

        • CJ_96601
          Junior Member
          Junior Member
          • Jun 2004
          • 1

          #5
          OOS

          Try using Scenalyzer..It works perfectly for me

          Comment

          • reboot
            Digital Video Expert
            Digital Video Expert
            • Apr 2004
            • 695

            #6
            WTF has Scenealyser got to do with audio sync problems?
            My DVDLab (and other) Guides

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