Audio delay correction

Discussion in 'Video to DVD' started by carlmart, Sep 6, 2007.

  1. carlmart

    carlmart Regular member

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    I have an avi file on which one of the audio tracks has at least one second delay with video. It may be more.

    Which program can I use to correct that, if possible seeing it when I move the audio to and fro?
     
    carlmart, Sep 6, 2007
    #1
  2. attar

    attar Senior member

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    From 'Mistycat'
    Drag your file into the top window, highlight it and select "generate data".
    In the lower window' highlight the audio and if anything other than 0 appears to the right, select "start" and in a minute or two you'll have a new file to use.

    http://www.alexander-noe.com/video/amg/AVI-Mux_GUI-1.17.7.zip
     
    attar, Sep 7, 2007
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  3. carlmart

    carlmart Regular member

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    First of all let me correct my comment on the film: the audio is AHEAD of the video, not behind. Probably by a second or less.

    Second is that this file has two audio tracks: audio 1 in Spanish and audio 2 in English. Audio 1 seems to be right, as long as a dubbed track could be. Audio 2 is running about 1 second ahead, and is the one I want to correct. I won't be using the dubbed track.

    So I installed AVI Mux and did things as you explained. The program stated a 24ms delay on both tracks, which to start with is not really so. But I went ahead and let it work.

    Audio 2 is still ahead of the video by 1 second.
     
    Last edited: Sep 8, 2007
    carlmart, Sep 8, 2007
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  4. carlmart

    carlmart Regular member

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    Another problem case. This is a recent file, lasting about 6 hours.

    Until about 1.30 hours sync goes fine, then it starts going out of sync, until it gets more and ahead of the video.

    So I went through AVI Mux with it. It didn't show any delay, but I went ahead with it anyway.

    The new file keeps sync until 1h 29min, then... audio goes MUTE!

    What may be happening and what can I do about it!
     
    carlmart, Sep 8, 2007
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  5. attar

    attar Senior member

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    Just to be clear, the original (pre AVI-Mux) has a consistent out of sync condition throughout or is it ok for 1.5 hrs then abruptly goes out of sync?
    Was this a collection of files that have been joined or is the 1.5 hrs point unrelated.
     
    attar, Sep 8, 2007
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  6. carlmart

    carlmart Regular member

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    It starts going out of sync after 1.5 hours, gradually, and it's more far apart at the end. Very strange.

    Apparently it's a TV mini-series, though it was also screened as a two-part film in some countries.
     
    carlmart, Sep 8, 2007
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  7. attar

    attar Senior member

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    attar, Sep 8, 2007
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  8. MysticE

    MysticE Active member

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    Could be caused by file corruption at that point or badly joined files.
     
    MysticE, Sep 19, 2007
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  9. carlmart

    carlmart Regular member

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    Quite likely the latter. I could get another file that was fine.
     
    carlmart, Sep 20, 2007
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