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Thread: Possibly quite stupid question about clip lengths

  1. #1

    Possibly quite stupid question about clip lengths

    Hi

    Do the latest versions of Catalyst still have the maximum workable clip length of 45mins? I remember this being an issue a few years back, I don't know if it's ever changed.

    I may well want to play back a 180min movie and have it sync to SMPTE, wherever we jump in the music track the video stays in sync...

    Thanks

    Ian

  2. #2
    Join Date
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    Hi Ian

    no max length in terms of movie playback

    HOWEVER:
    In and out frame are only possible for 65535 frames(16bit - about 42mins at 25fps) - but this does not limit playback to 42 mins - movies will run longer, but you cant specify the in/out point beyond 655535 frames... fine for most scenarios

    This also provides an issue for sync to smpte for the same 65535 reasons. Richard did introduce a feature of adding both inframe and outframe values to allow smpte sync over 65535 frames. However, Catalyst ignores the "hours" for smpte timecode - so it can still cause issues if your clip is over an hour long, or starts near an hour change...

    There is the ability to introduce an offset - but this can get VERY complicated...

    In short - sync to smpte for movies less than 42 mins (@25fps) works fine... you will need to experiment for syncing longer movies.

    Simon
    Simon Pugsley

    SNP Productions Ltd. (UK)
    Lighting & Video Control Solutions
    Catalyst|Sales|Hire|Training|Support
    Catalyst Dealer UK Europe & Worldwide...

    Office: +44 (0)1908 410129
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    simon@snp-productions.co.uk
    www.snp-productions.co.uk

  3. #3
    Quote Originally Posted by iwgalloway View Post
    Hi

    Do the latest versions of Catalyst still have the maximum workable clip length of 45mins? I remember this being an issue a few years back, I don't know if it's ever changed.

    I may well want to play back a 180min movie and have it sync to SMPTE, wherever we jump in the music track the video stays in sync...

    Thanks

    Ian

    you can make a cue list triggered by timecode which loads different movies at timecode points -

    the 45 minutes thing related to dmx 16bit value is really tricky to change.

    the movies can be programmed to set frame 0 to any point with smpte options in cue list.

    i might have to work on some autolocation stuff to make the cue list relocation work anywhere -

  4. #4
    This sort of opens a whole new can of worms but there is the need from time to time to run timecode with frame accuracy on shows that are several hours long. I make this point more for having the need to externally sync timecode.
    SourceChild
    TODD SCRUTCHFIELD

    ...if it ain't broke...
    gimme 5 and then don't act surprised

  5. #5
    Quote Originally Posted by SourceChild View Post
    This sort of opens a whole new can of worms but there is the need from time to time to run timecode with frame accuracy on shows that are several hours long. I make this point more for having the need to externally sync timecode.
    as most shows are extremely unlikely to use a single movie .... hours long ....

    using a cue list would almost always be fine. and would be usual approach -

    or whatever they do on a lighting console to trigger different movies to sync to mtc

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