Dual Layer Discs

Discussion in 'Video Cameras' started by Nick Le Lievre, Dec 5, 2006.

  1. If I was to burn a Dual Layer Disc in a PC Burner would this play on
    standalone dvd players/recorders (a recorder which doesn't support dual
    layer writing) or would it be an invalid disc.

    Seems to me that if dual layer recordable discs are worthwhile they must be
    able to play on the majority of standalone players/recorders out there which
    probably don't support dual layer writing - or do they only playback on
    recorders which support dual layer writing.

    Thanks.
     
    Nick Le Lievre, Dec 5, 2006
    #1
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  2. Nick Le Lievre

    John Russell Guest

    Unfortunately most DVD players do not "explicitly" state recordable dual
    layer support, so you are left to experiment and find out. This is a
    similar situation to where we where 5 years ago, when no player even
    admitted to playing single layer layer recordable disks, and again it was
    left to trial and error to find out.

    The only safe way is to play on a DVD Recorder, but then your disks won't
    play if you take them somewhere where they only have a DVD player.
     
    John Russell, Dec 5, 2006
    #2
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  3. and I suppose its doubtfall that my dual format dvd recorder which doesn't
    do dual layer discs will be able to read dual layer +R/RW discs... it'll
    probably say invalid disc rather then read it - what do you think?
     
    Nick Le Lievre, Dec 5, 2006
    #3
  4. Nick Le Lievre

    John Russell Guest

    I bought a Panasonic DVD Recorder for exactly that this reason and it never
    has a problem with dual layer disks created on my PC. But since they won't
    play on ordinary DVd players I reverted back to producing double single
    layer disk recordings and using a double disk case!
     
    John Russell, Dec 5, 2006
    #4
  5. Nick Le Lievre

    G Hardy Guest

    Considering that a lot of set-top players (which support pressed DL
    natively) struggle with dye-based DL discs, you'll probably find a similar
    proportion of SL recorders will struggle with writable DL discs.
     
    G Hardy, Dec 5, 2006
    #5
  6. They play on the ones they play on. Can't be much more help than
    that I'm afraid. Probably not a good idea for general distribution.
     
    Laurence Payne, Dec 5, 2006
    #6
  7. Nick,

    At a video bitrate of 6000 Kb/s and compressed sound (f.i. Dolby 2.0 at 224
    Kb/s) you get approximately 1 hour and 40 minutes of excellent quality on a
    DVD. Therefore, you might consider if you need DL discs at all.
     
    Lou van Wijhe, Dec 6, 2006
    #7
  8. P.S.: In MPEG-2 encoding do use a variable bitrate (VBR).
     
    Lou van Wijhe, Dec 6, 2006
    #8
  9. Nick Le Lievre

    G Hardy Guest

    At a video bitrate of 6000 Kb/s and compressed sound (f.i. Dolby 2.0 at
    It's good advice about VBR - up to a point. There's often no need for VBR at
    6mbps. Depending on your source, you should consider VBR when the bitrate
    drops below about 4½. If you have exceptionally good or exceptionally bad
    footage, or complex footage such as an action film, you might consider VBR
    at such a high bitrate, but for a standard TV broadcast or (especially) DV
    footage, encoding to VBR at that rate is a bit pointless.

    It follows that if you're recording something that you haven't seen before,
    you should consider VBR so that you're not caught out by the unknown nature
    of the film. The problem with VBR is that it sometimes uses bandwidth for
    non-important sections such as crossfades or fancy transitions.
     
    G Hardy, Dec 6, 2006
    #9
  10. Is there a compatibility difference between +R DL and -R DL?
     
    Lou van Wijhe, Dec 6, 2006
    #10
  11. Nick Le Lievre

    Just D Guest

    "Lou van Wijhe"
    I guess so, + and - are different standards, but honestly I've seen many
    DL+, but never DL- in the stores nearby. I'm wondering why... Politics of
    the companies making these disks?

    Just D.
     
    Just D, Dec 7, 2006
    #11
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