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AC-3/Divx Audio/Video Synch

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  • Kaiser-Soze
    Platinum Member
    Platinum Member
    • Jan 2002
    • 165

    AC-3/Divx Audio/Video Synch

    I have ripped about 80 DVD's to Divx using MP3 Audio
    and I never encountered Audio/Video Desynch but when it comes to Divx/AC-3 the dumb thing won't work
    I am trying to rip "The Crimson Rivers" (PAL) to DivX/AC-3 (448Kb 5 Channels)
    and I have used different settings to preloading and Interleaving
    like:

    Preload:160 Interleave:160
    Preload:128 Interleave:128
    Preload:160 Interleave: 60

    but the result is the same everytime
    The sound is always forward than the video playback

    I know that the real pain in the ass when it comes to converting DivX with AC-3 is the Audio/Video Synch but what troubles me is that at least I should see some improvement when I change the settings but I don't. It's the same thing
    weird...
    ****************
    Speak until the tape runs out. Playback the tape until the story is finished...
  • setarip
    Retired
    • Dec 2001
    • 24955

    #2
    Although you didn't mention the software by name, it's apparent that you're using the .AC3-modified version of VirtualDub.

    In the same box where you've gone to change the preload and interleave settings, you'll see a section for "Audio skew correction".

    Let us know of your success;>}

    Comment

    • Kaiser-Soze
      Platinum Member
      Platinum Member
      • Jan 2002
      • 165

      #3
      I used the Audio Skew correction (Value 373 ms)
      but it still did'nt make any difference.
      I have read somewhere that about 10% of the problems ripping
      with AC-3 are not correctable.
      Is this true? Do u know anything about it?
      ****************
      Speak until the tape runs out. Playback the tape until the story is finished...

      Comment

      • setarip
        Retired
        • Dec 2001
        • 24955

        #4
        I've never heard of such a thing ("10% are uncorrectable).

        "I used the Audio Skew correction (Value 373 ms)
        but it still did'nt make any difference."

        I'm sure it made a difference, but perhaps not significant enough for you to notice. I'd suggest that you try a skew correction of 1,000 or greater, just so you can readily see a difference - and the make adjustments as are necessary.

        Comment

        • Kaiser-Soze
          Platinum Member
          Platinum Member
          • Jan 2002
          • 165

          #5
          Thanx I ll try that
          but still isn't it a pain in the ass to have to make the DivX 4 or 5 times to get it right?
          I don't have so much time to do the movie 4 or 5 times because I am ripping at least 1 movie a day and my H.D (40 GB.) is always full
          Are all AC-3/Divx like that or is it just this?
          ****************
          Speak until the tape runs out. Playback the tape until the story is finished...

          Comment

          • setarip
            Retired
            • Dec 2001
            • 24955

            #6
            "but still isn't it a pain in the ass to have to make the DivX 4 or 5 times to get it right?"

            Naaah... think of how gratifying it feels when you finally "get it right" ;>}

            Comment

            • Kaiser-Soze
              Platinum Member
              Platinum Member
              • Jan 2002
              • 165

              #7
              True , True...
              I 'll let u know how it went with the dumb movie
              ****************
              Speak until the tape runs out. Playback the tape until the story is finished...

              Comment

              • UncasMS
                Super Moderator
                • Nov 2001
                • 9047

                #8
                try these settings:

                AC3 192kbit/s => Preload: 80ms Interleave every 80ms.
                AC3 384kbit/s => Preload: 160ms Interleave every 160ms.
                AC3 448kbit/s => Preload: 128ms Interleave every 128ms.

                Comment

                • Kaiser-Soze
                  Platinum Member
                  Platinum Member
                  • Jan 2002
                  • 165

                  #9
                  I have read the guide and tried Preload 128ms Interleave 128ms
                  (My audio is AC3 448kbit/s) but still nothing.
                  No improvement
                  ****************
                  Speak until the tape runs out. Playback the tape until the story is finished...

                  Comment

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