I'm working on a True 4K 4096x2160 project Avid 8.5.2. The rail camera is a bit unstable so the call is to stabilize many of the shots. I started re applying the stabilize effect to retrack with the 4K media and replace the effect from offline and discovered the project had been switched to HD. Not surprisingly with the project set to 4K the stabilize effect takes much longer to track. It is running at approx. 40 times real time when in 4K. I haven't done a precise test but it's a lot longer than when I was applying the stabilize with the project in HD.
I don't fully understand what is behind the fluidstabilizer, I just know it works on many shots. Given the tracking time difference between HD and 4K project settings I assume the tracker is looking at more pixels when in 4K mode but I'm wondering if the difference in tracking time really creates a lot better stabilize effect? I've seen all kinds of quirky behavior with the stabilize effect that looks fine and some time later I go back and it's displaying the image in a corner of the raster like it was part of a quad split. I don't know what causes the whacky offset but I'd speculate that perhaps if a project gets changed to say SD that in some instances the stabilizer effect gets something like a scaling offset when it somehow refreshes itself in the odd project format or perhaps when switching back to the intended project format. It all makes me nervous about unexpected consequences.
Can anybody shed some light on the algorithm behind the stabilize effect and how it might subsequently get effected by project format changes? I always reapply the stabilizers in online but now I'm curious if theoretically there might time savings to stabilize in HD mode to save time. My gut says no but figured I'd throw it out to the groups to see what I can learn.
John Moore Barking Trout Productions Studio City, CA bigfish@pacbell.net
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Posted by: John Moore <bigfish@pacbell.net>
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this is the Avid-L2
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