Synching 435 ramps to music
Posted 10 November 2006 - 09:53 PM
Shooting a music video in a few weeks where there will be specific ramping cues that will coincide precisely with ramps in the playback. For instance...the video will begin at 96fps, with the playback four times as fast, and at a certain cue, the camera will ramp to 6fps, and the playback twice as slow...with the idea here that obviously the bands performance will ideally appear at "real time" throughout.
I assume that this has been done before, and am curious what devices might be available to sync the 435s ramps to the playback cues. I was told that this could possibly be done by the playback tech. Is this true? And if so....how exactly does it synch up with the 435.
Posted 12 November 2006 - 07:52 PM
The most economic way I know to do this involves synchronizing the audio playback to the camera. I believe that the 435 generates a SMPTE code. This signal can be used control the playback speed of some audio applications like pro-tools (for mac) or vegas (for windows).
If your playback tech has a laptop loaded with Sony's vegas he/she will need two things to synchronize the audio playback to the spped of the camera. First a usb midi device. These can cost as little as $40 from any professional audio equipment retailer like hhtp://sweetwater.com or even http://guitarcenter.com Second a SMPTE-MTC conveter. I havn't seen one of these new for a while but I bought off ebay a couple of years ago for $20. The brand of the one I use is Midiman and the model is syncman SMPTE/Song Pointer Snyc Box. The camera plugs into the syncman box, the syncman box plugs into the usb midi interface, and the midi interface is plugged into a laptop, or whatever computer you use durring production for audio playback. The Vegas software has a button on the main console that needs to be selected. With the audio file loaded into the timeline it will play as soon as the camera roles, and it will play at the speed the camera is running at.
I have even used the sncman to do the same thing with older camera that only output an old pilotone signal.
Posted 13 November 2006 - 01:22 AM
Posted 13 November 2006 - 03:41 AM
Posted 14 November 2006 - 04:25 PM
I wonder if it might work better for you to shoot the whole thing at high speed and then retime in post using optical flow? I'd imagine you would be able to get some pretty good-looking results, and you would be able to keyframe the whole thing really precisely.
Yea, thats what I was thinking at first....but then realized that at 96 fps, a 4 1/2 min song would be longer than 1000ft... oh well...
Thanks all for the help.