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Thread: SYNC to SMPTE

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  1. #1
    Join Date
    Oct 2004
    Location
    UK - Milton Keynes
    Posts
    807
    Catalyst reads SMPTE timecode via the sound line input.
    You need to enable 'line in' via system preferences
    Then turn on sound in the 'inputs' window on the HUD (next tab along from video inputs)
    You should then see timecode being read in the timecode device in the catalyst control window/list (also can be seen in at the bottom of the stats view on the HUD)

    To link a clip to timecode you must select the playmode: 'Sync to SMPTE L' (right does not work in m257.... Richard may have fixed this in later release....)
    The inframe value then becomes the sync point.
    ie if you need to synchronise a clip to start at 10sec, you would set the inframe value to 250frames (assuming 25fps timecode) or 300frames (if 30fps timecode)

    The inframe also allows you to adjust the sync point of the clip if required - just by changing the frame value...

    The problem occurs when you get to about 43mins... because you run out of 16bit values with which to sync. 65536(16bit)=about 43mins at 25fps

    So avoid syncing anything beyond 43 mins (25fps) o 36mins (30fps)
    You will need to jump timecode to the next hour to continue.

    Catalyst ignores the "hours" for syncing timecode using 'inframe'
    but not in a cuelist.

    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.

    You should always ensure that your timecode = movie fps rate = refresh rate
    ie SMPTE 25fps = 25fps movie = 50Hz or 75Hz ouptut

    For Catalyst cuelists - this works in a similar way - but the timecode controls the cuelist and the hour is not ignored in this case...


    Do call if you need some assistance

    Regards

    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
    Mobile: +44 (0)7958 390034
    simon@snp-productions.co.uk
    www.snp-productions.co.uk

  2. #2
    Simon

    Thanks again for your help.


    So I can't sync to the embedded time code?

    Or do i just leave the inframe at 0 to do this?

    Nick

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