motion-activated video recording

    Apr 04 2008 | 7:31 pm
    I'm looking for a way to record video to disk when there's a certain level of activity in an installation I'm designing. So far I've gotten it to trigger a jit.dx.grab object after it senses a sustained amount of motion, but whenever that happens I receive a "save as" prompt for the movie file (which I won't be around to click). When I specify a filename in the "write" argument, it just continues to write over the same file (or deletes it when I send a "stop" message).
    What's the best way to go about doing this? How can I build a library of individually named clips without being there to name them (i.e. implementing a $1 argument in the filename)? Is there a way to record incrementally to a single movie file? Ideally I'd just send stop/record messages to a DV cam and record straight to tape, but I don't have enough firewire cable to do that for this kind of distance.
    Anyway, thanks in advance for your help - any ideas would be much appreciated.

    • Apr 04 2008 | 8:15 pm
      one way of many.
    • Apr 04 2008 | 8:20 pm
      Sprintf, of course... Thanks for the help.
      Is jpeg the best codec for quality/space that you suggest?
    • Apr 04 2008 | 8:27 pm
      well generally, but always worth testing