I've noticed if I import a 29.97I QT into a 23.976 NTSC project the resulting clip has an fps of 23.98 and a field motion of interlace if I don't let the import convert to a progressive project native resolution. The clip plays jerky due to the import maintaining proper play speed through the QT import resulting in skipped fields or frames (this is normal in my experience). The quirk is you can't do a traditional motion effect (pre time warp style) because it generates an error saying the clip has a non native frame rate and that it would have to be created in a native frame rate project. Turns out it's not really a frame rate issue but a field motion issue. If on import I let the import convert to the media creation setting of the project the resulting clip is 23.98fps and a field motion of progressive. The resulting clip will allow the old style motion effect. The solution for the interlace clips imported is to use a timewarp for a motion
effect. Now this seems to work in offline but I can't help thinking this is going to be a bit of a nightmare in online. The mix and match feature is allowing interlace material into a progressive offline timeline. I would think this is going to create blended field frames when the 23.98 offline is onlined in 23.98 HD. If these original QT movies are interlace these blended frames would be blurry do to the temporal difference between the two fields now being combined into a progressive frames on display. It's just feeling like the light at the end of the tunnel is a train but I'm curious what others think. It has been said before but seems fitting to repeat. The mix and match feature is starting to feel as iffy as FCP can be with it's open timeline. Also it just dawned on me that with mixed frame rate timelines you can't batch import so I guess I need to figure out if the interlaced clips were imported as 23.98 or 29.97 and if the batch
import restriction is really based on a mixed frame rate or mixed field motion or maybe both. Man my brain is really starting to hurt. I hope I'm just over thinking this.
John Moore
Barking Trout Productions
Studio City, CA
bigfish@pacbell.net
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