Graininess during pans in DVD of DV material - apparently not all DV is the same?

Discussion in 'Amateur Video Production' started by Doc, Oct 7, 2006.

  1. Doc

    Doc Guest

    I keep hearing that "DV is all the same". But apparently not. I had some DV
    avi that I burned to a dvd for future use, which I incorporated into a DVD
    of mixed material, along with some 8mm film footage captured to Digital8
    tape and then dumped onto the hard drive.

    Upon rendering of the DVD, the DV avi footage I had stored on the DVD all
    has a problem when rendered for this DVD project - i.e. whenever there's
    significant movement, particularly sideways, the image gets this grainy,
    "impressionist" look. The files look fine when played by themselves. But
    when incorporated into the DVD project, it develops a problem.

    However, this doesn't happen with any of the dv captured film footage. The
    difference is the film capture DV was dumped in via the DVD authoring
    program Pinnacle Studio 9. I can't recall for sure, I many have used WinDV
    to capture the video stuff. It was originally analog video that was
    converted to DV avi via passthrough.

    Any ideas why this might be happening? I suppose I could go back and
    recapture the video stuff directly via Pinnacle, but I'd like to get to the
    bottom of why it's happening.

    Thanks.
     
    Doc, Oct 7, 2006
    #1
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  2. Doc

    jerry Guest

    Did you get your DV fields flipped?

    Try changing the field order.

    DV is always LOWER FIELD.

    Jerry Jones
    http://www.jonesgroup.net
     
    jerry, Oct 7, 2006
    #2
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  3. Once you go to DVD, you aren't talking about DV
    anymore. You are dealing with MPEG2 which has
    a wide range of quality levels depending on how
    you compressed it.
     
    Richard Crowley, Oct 7, 2006
    #3
  4. Doc

    Jukka Aho Guest

    Yep, sounds like a field order problem to me. Especially if the motion
    on the problematic parts stutters when viewed on a CRT-based 50 Hz or 60
    Hz tv set.

    (On the other hand, if the video doesn't stutter when viewed that way
    but goes smoothly, then there is no problem, and the whole thing might
    be just the OP misinterpreting interlaced material as a defect when
    viewing it on a computer screen and seeing the adjacent fields combined
    to frames.)
     
    Jukka Aho, Oct 9, 2006
    #4
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