avi frame rate 23.975 and audio sync

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  • at_mix
    Junior Member
    Junior Member
    • Nov 2003
    • 7

    avi frame rate 23.975 and audio sync

    I have a file divx5.0 w/ frame rate of 23.975 ( instead of 23.976)

    and audio divx(wma). When i convert i get an increasing audio

    sync.

    Do i have to change the frame rate? or just matching the

    frame rate and sound in virtualdub ( direct stream copy or full

    processing )?


    Thanks
  • ormonde
    Digital Video Explorer
    • Dec 2003
    • 3735

    #2
    "Do i have to change the frame rate? or just matching the frame rate and sound in virtualdub ( direct stream copy or full processing )?"

    First try a "Quick" method:

    1. Open your divx file in Virtual Dub or VirtualDubMod

    2. Select "Video" > "Framerate"

    3. Select the radio button for "Change so Video and Audio Durations Match" click OK

    4. Go to "File" > "Save as AVI" (F7)

    Comment

    • at_mix
      Junior Member
      Junior Member
      • Nov 2003
      • 7

      #3
      It didn't work. I still have an increased audio sync ( sound is

      earlier in the end, it starts ok ) when i convert to dvd.

      Isn't it because of the strange frame rate 23.975 and the divx(wma) audio.

      Do i have to change frame rate? What can i do?

      Comment

      • ormonde
        Digital Video Explorer
        • Dec 2003
        • 3735

        #4
        "Do i have to change frame rate? What can i do?"

        Visit the following link listed below.

        Comment

        • setarip
          Retired
          • Dec 2001
          • 24955

          #5
          Based on the audio format used, I'd speculate that it was actually interleaved with the video every 500 milleseconds, rather than every 1 frame.

          1) Load the file into the standard VirtualDub

          2) Set "Video" to "Direct Stream Copy"

          3) From the "Audio" dropdown menu, select "Interleaving" - and set "Interleave audio every" to 1 frame

          4) From the "Audio" dropdown menu, select "Full Processing Mode" - Select "Compression" and choose the 96Kbps the MPEG Layer 3 (.MP3), 44,100Hz sampling rate

          5) Save with a new filename

          Comment

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