Need to normalize an AVI file

Discussion in 'Other video questions' started by janlafata, Oct 16, 2009.

  1. janlafata

    janlafata Regular member

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    I say normalize because that's the only way I can explain it. Upon playback, but just in some parts, this file gets a little fuzzy and looks like it's distorting at times.. I had this problem on an AVI file a long time ago, but I ran it through VirtualDub and it cleaned it up. Unfortunately I can't remember what settings I used. Might AVIdemux also work, or do you have any other suggestions?
     
  2. davexnet

    davexnet Active member

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    I think the tool you use is secondary to actually knowing what it is
    you want to do. Are you talking about brightness/contrast issues?
    Or do you mean something else by "normalize" ?

    In Virtualdub you can use the filter in blend mode,
    and then with the curve editor, have it apply only to certain
    segments that need it.
     
  3. janlafata

    janlafata Regular member

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    Sorry I guess I did not make things clear. Basically the file plays just fine from stop to start in WMP, it's only when I use the slider on WMP to jump ahead to check the quality of the whole file, that it distorts. It's like the rest of the video has not caught up with what was there before or something. After a few seconds though or when the scene changes everything gets back to normal.

    Here's an Image Shack screenshot of it. Alo below is the file stats from MediaInfo:

    http://img73.imageshack.us/img73/3121/ourtowndistorted.jpg

    General
    Complete name : E:\Video\Unedited Video\Our Town.avi
    Format : AVI
    Format/Info : Audio Video Interleave
    File size : 697 MiB
    Duration : 1h 29mn
    Overall bit rate : 1 088 Kbps
    Writing application : Nandub v1.0rc2
    Writing library : Nandub build 1852/release

    Video
    ID : 0
    Format : MPEG-4 Visual
    Format settings, BVOP : No
    Format settings, QPel : No
    Format settings, GMC : No warppoints
    Format settings, Matrix : Default (H.263)
    Codec ID : XVID
    Codec ID/Hint : XviD
    Duration : 1h 29mn
    Bit rate : 996 Kbps
    Width : 512 pixels
    Height : 384 pixels
    Display aspect ratio : 4:3
    Frame rate : 23.976 fps
    Resolution : 24 bits
    Colorimetry : 4:2:0
    Scan type : Progressive
    Bits/(Pixel*Frame) : 0.211
    Stream size : 638 MiB (92%)

    Audio
    ID : 1
    Format : MPEG Audio
    Format version : Version 1
    Format profile : Layer 3
    Codec ID : 55
    Codec ID/Hint : MP3
    Duration : 1h 29mn
    Bit rate mode : Variable
    Bit rate : 79.7 Kbps
    Channel(s) : 1 channel
    Sampling rate : 48.0 KHz
    Resolution : 16 bits
    Stream size : 51.1 MiB (7%)
    Alignment : Aligned on interleaves
    Interleave, duration : 24 ms (0.58 video frame)
    Interleave, preload duration : 462 ms
    Writing library : LAME3.89 (beta)

     
  4. davexnet

    davexnet Active member

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    Open the file in Virtualdub and locate one of the problem area's.
    Step forward frame by frame and see if you can recreate the problem.

    A second thing to try, set audio and video to "direct stream copy"
    then File/save as avi (to save to a new avi)
    and see if the new one does the same thing.

    If it still has a problem, use virtualdub to reencode it.
    Set audio to "direct stream copy" and video to "fast recompress"
    Set video/compression and select xvid. Hit configure/load defaults.
    OK out, File/Save as avi
     
  5. janlafata

    janlafata Regular member

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    Well I always like to keep my threads updated, especially if I found a solution. I re-size all of my AVI's before I burn them to DVD anyway, so I thought, even with this little glitch I need to see what will happen when I re-size this file.

    So I just used the drop-down in Video and selected MPEG 4 Xvid, picked a size and started. When I was finished, there was no trace of distortion when I used the slider to check my video.

    Don't know the reason it worked but I'm not complaining. Thanks as always for your assistance!
     

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