Drift when sync'ing multiple projectors
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has anyone found a good method for keeping long clips in sync?
4 HD clips of the same length, size, specifications running 80 minutes. it will be run off an 8-core machine with 8G ram, SSD and 4 separate cards. (720p is more likely than 1080p)i'm experimenting with DV on an older tower (1,1 with 16G Ram and the media is on WD internal drives) until i get the show equipment--it's not too bad but there's definitely drift.cheersmike -
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thanks! i had checked out that post but couldn't tell how it would work on a single processor sending to 4 cards. willing to experiment away but not a bithead, so there's a large element of guesswork.
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Ah sorry I misunderstood.
I think using an envelope generator linked to the position would maybe be your best bet then.If you feel there is a drift then maybe try and delay it by putting a very small video delay actor in front of the top movie player video outputs?I am sure you will crack it :-) The SSD will really help! -
ok, will give it a shot, thanks
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Dear Mikemixed,
Be aware that Graham's solution is very processor intensive -- each time you update the 'position' input, QuickTime does a lot of stuff under the hood. You'll see your CPU usage rise dramatically. Additionally, if there is audio associated with the movie, you'll hear it jumping around. Of course, feel free to try his solution, but keep on eye on these things.Best Wishes,Mark -
did you also look at the sync user actor I have made? Controlling the speed of the client players to adjust the speed? But this means that all movies have to have the exact same length.
http://forum.troikatronix.com/cgi-bin/forum/gforum.cgi?post=539#539Best
Michel -
Michels actor is what I always use and it works really well
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Sorry @michel this was the post I was thinking about when searching the old forum! I had forgotten it was you who created it.
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no problem graham.
