How to start/stop DV capture to PC using the start/stop recording button on camera

Discussion in 'Professional Video Production' started by mensoy, Nov 25, 2004.

  1. mensoy

    mensoy Guest

    I would like to capture DV footage from my DSR250 to my laptop (via
    firewire) and to tape at the same time. Currently, I am using
    scenalyzerlive for the PC capture. The problem is I have to hit the
    capture button on the program and then hit the record button on my
    camera separately. Not only is this method inconvenient, the recorded
    clip on tape and captured clip on laptop does not sync up.

    Is there any program that starts capture in sync with the record
    button on the camera and stops the capture when the camera stops

    Thanks for your help!!
    mensoy, Nov 25, 2004
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  2. mensoy

    Steve King Guest

    There is currently a long thread on RAMPS (Rec.Audio.Motion Picture.Sound)
    that you might want to read. The film and video audio mixers who hang out
    there are discussing the possibility of a system where the separate HD based
    audio recorder might be started and stopped with the camera AND where the
    time codes in camera and audio recorder will match the camera set to record
    run LTC. The goal being that should this be possible post production would
    find it easy to synch up the double system sound. My very possibly flawed
    understanding of the issue is that because their HD recording systems
    (basically a computer creating wave files) handle time code differently than
    a camera and deck, that it is not currently possible to record audio with
    identical LTC to what the camera puts on tape, and that there is currently
    no easy way to start and stop software using signals from the camera. You
    may want to check out the thread.

    Steve King
    Steve King, Nov 26, 2004
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  3. actually news:rec.arts.movies.production.sound
    Richard Crowley, Nov 26, 2004
  4. mensoy

    Johan Stäck Guest

    A DV camera in camera mode sends out video data on the firewire port all
    of the time. This is regardless of "rec" mode or not.
    However, only when a tape is running will the DV frames contain valid
    timecode. (Not to be confused with date/time which is always present)

    Thus, a HD recording program could simply look at the DV frames, and
    only write to disk if there is valid timecode present. (will be all
    binary 1:s when invalid, if I remember correctly)

    I don't know if any of the present HD recorders or software (e.g.
    scenalyzer) has this feature, but it could easily be implemented as I
    see it.

    /Johan S
    Johan Stäck, Nov 26, 2004
  5. DV Rack <> does that, and a lot

    Loren Amelang, Nov 26, 2004
  6. mensoy

    mensoy Guest


    Thank you very very much for pointing me to DV Rack. It's is EXACTLY
    what I am looking for. It achieves what I wanted plus a lot more.

    mensoy, Dec 2, 2004
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