"Banding" effect in DivX and XviD conversions...

Discussion in 'DivX / XviD' started by avoidz, Mar 14, 2004.

  1. avoidz

    avoidz Member

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    Hi, I've been using Gordian Knot for some time now, but on a recent DVD conversion the video has a strange "banding" effect at the top of the frame. I first used XviD (07-FEB-2004), then DivX Pro 5.1.1 codecs - same thing.

    It seems to come and go regularly, and wondered if I have some settings messed up causing it; something to do with key frames?. A screen capture is shown below:

    [​IMG]

    Thanks for any help :)
     
    avoidz, Mar 14, 2004
    #1
  2. Mick69

    Mick69 Guest

    your video looks fine, its probably ur source that is giving u grief.

    the video quality in your screen shot is well above average for a divx/xvid

    i'd blame your source if anything, for the line that is barely noticable on top of the screen, seriously, i've downloded much much worse

    cheers m8
     
    Mick69, Mar 14, 2004
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  3. avoidz

    avoidz Member

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    The source was my DVD :) It's not that noticeable - and it wasn't on the source video - but I like to get my conversions as perfect as possible.
     
    avoidz, Mar 15, 2004
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  4. Mick69

    Mick69 Guest

    lol i c

    hmmmmmmmmm, cant say i have a fix as ive never used gordian knot b4, so im not going to suggest a different setting

    i'll leave this to people that have experience with gordian knot to answer this 1

    cheers m8
     
    Mick69, Mar 15, 2004
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  5. avoidz

    avoidz Member

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    Thanks anyway :) Gordian Knot is great, but possibly becoming obsolete with DVD burners being so cheap these days.
     
    avoidz, Mar 15, 2004
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  6. Mick69

    Mick69 Guest

    lol your quick to reply

    yeah i dont have a dvd-burner or even a dvd-rom for that matter, so my knowledge on dvd ripping programs is very limited

    anyways hope sum1 can help you

    l8r m8
     
    Mick69, Mar 15, 2004
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  7. The_OGS

    The_OGS Active member

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    A man who likes his Quality, and likes his Trek, is a good man.
    I, therefore, wish I could help you...
    Well I can tell you the undesired artifact maybe an anamorphic shadow or 'ringing' which you probably don't get with a non-anamorphic source. I don't think it is a GKnot problem, but might have to do possibly with RFI/EMR in your system case, or possibly your 32/16 rules for pixel resizing (horiz/vert modulus).
    It could also be something you see introduced in playback, not really present in the AVI.
    I say 'spread spectrum' and not to worry, it's pretty subtle and probably just electronic noise, tough to ID and cleanup! Coupla beers and it goes away.
     
    The_OGS, Mar 19, 2004
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  8. avoidz

    avoidz Member

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    Thanks, The_OGS :) You're right; it's not very noticeable. I'll check my next re-encode and see if it has the same effect happening, though.
     
    avoidz, Mar 20, 2004
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