3-pass option ???

Discussion in 'CloneDVD mobile' started by chuckles9999, Aug 22, 2007.

  1. chuckles9999

    chuckles9999 New Member

    With v1154, we have an option of doing up to 3 passes. What does this option do? Will it provide a better quality video movie?
  2. Zeratul

    Zeratul Well-Known Member

    from what i remember the first pass analyzes the movie to adjust the bitrate. dark parts of movie dont need as much data to show them, so cdvdm can reduce quality without you noticing. but if it suddenly shifts to a bright shot, cdvdm on one pass will not be able to compensate immediately and you will get a pixelated mess for a little bit. the multiple passes lets it know when to compensate for better quality without raising the resulting filesize.
  3. Matt

    Matt Well-Known Member

    In short:
    "more passes = better quality for the same size file"

    The point of diminishing returns is about 3, which is why it has been limited to that.