A small technical question about laserdiscs

Discussion in 'DVD' started by Jon Robertson, Sep 15, 2004.

  1. Jon Robertson

    Jon Robertson Screenwriter

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    Was it possible to put both CAV and CLV video footage on the same side of a laserdisc? If, for example, one had the tail end of a film in CAV, then wished to put some supplemental footage in CLV so as not to extend onto another disc.
     
  2. Davin D

    Davin D Agent

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    I don't know if it's possible or not. I do know that I have many laserdiscs and have never seen it. I would doubt it as the player would have to change speed (or type of speed) in the middle of a side. I would think that would be difficult to do.
     
  3. Mike Wadkins

    Mike Wadkins Supporting Actor

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    as far as im aware no due to the mastering prosess being so different
     
  4. Matt Stone

    Matt Stone Lead Actor

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    I can't be 100% sure, but I don't believe it's possible.

    PS, Nice Shaun of the Dead sig, Mike [​IMG]
     
  5. Gary Seven

    Gary Seven Grand Poo Pah

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    No.

    CAV puts the same amount of info on all tracks. CLV puts information in the amount that will fit on that track, thus, the amount of data differs from track to track. Being that the case, I don't see how they could have mastered a laserdisc with two different technologies on the same side.
     
  6. Jon Robertson

    Jon Robertson Screenwriter

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    Many thanks for your help, gents. I didn't think it was possible, but I wanted to make sure by those who knew more about the subject than I. [​IMG]
     
  7. ChristopherDAC

    ChristopherDAC Producer

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    From reading documentation, I think this was done on an early series of test discs, but as far as I know never on any commercial release. While physically possible, the technical difficulties [including the fact that CLV frames are encoded with a different set of subcodes than CAV frames] and lack of any particular motivation to do it would make it unlikely in the extreme to be implemented, and it was not written into the mastering standard. It is virtually certain you will never encounter such a disc, no matter how many LDs you go through.
     

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