Another post about exporting at 1080 in "full HD"

I was thoroughly confused by explanations in this forum regarding whether imovie 08 can import 1080p and export 1080p without going through an intermediate 960*540 step. I decided to try it for myself. I like making lists, so please bear with me...
Camera: Canon HF100
Computer: Macbook, osx 10.5.4, imovie 7.1.2
Import settings: "Full 1080"
Export settings: AIC, "current" framerate, compressor preset "other"
I tried the following resolutions: "1920 by 1080 HD" and "current"
I compared these three clips:
1) The imported clip from the imovie events folder
2) The exported "1920 by 1080 HD" AIC clip
3) The exported "current" resolution (960*540) AIC clip.
Results:
1 and 2 appeared nearly identical. I found a frame where someone's hair was pretty still (no motion blur). Found the same frame in both clips and command-` between them back and forth to compare. The only difference my eye could see was a small color difference, but I could not see any difference in resolution or detail.
3 was clearly worse than 1 and 2. To view 3, I set quicktime to view at double size. This way I can compare the three clips at the same size on-screen. My rationale for doing option 3 was that if imovie 08 indeed forced everything through an internal 960*540 step, 2 and 3 would be similar. But this was not the case.
Interestingly, exporting 3 was the fastest, and exporting 2 was pretty slow. This tells me two things:
1) Imovie 08 must keep some kind of pre-rendered or pre-calculated copy of the project or of the clips. If this copy of the project or clip were a 960*540 resolution, this could explain why it is faster to export at 960*540. However, this is still confusing...where does it store this pre-rendered copy of the clip? I can not find any file in the imovie events subdirectories that when opened in quicktime, are of this resolution.
2) When exporting at 1080p, Imovie must have to repeat some calculations on the original clips that it doesn't have to do at 960*540, as Jon Walker said in one of the earlier archived posts on this topic.
If there is interest, I will take the imported clip #1 and run it through imovie HD 6, and then export it to compare quality. But my own curiosity is satisfied for now.
I can also post images, but this test can be reproduced easily using any of your own clips.
Message was edited by: grittathh

OK you didn't mention that. If you left it charging at 5:30am it should have been full at 8:00am unless for some reason the charging didn't start.
I wouldn't worry too much for the moment, just keep an eye on it and make sure charging starts.

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