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Techniques for Independent Production
The challenges of creating Digital Cinema and other narrative forms.

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Old August 21st, 2003, 05:21 PM   #1
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Join Date: Mar 2003
Location: Netherlands
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Hello guys (and girls?) :)

If I want to de-interlace a small clip it's no problem with Magic Bullet and After Effects. Just start a new comp, give it an appropiate time, import the clip, add de-interlacer and export.

The only thing I don't get is why After Effect's timeline doesn't enlarge when more clips are added after each other. This way I have to get the exact running time from the AVI and set an appropiate comp time in AE.

Second: Let's say I got clips that are 9 gb in total and are all nicely edited in Premiere. Now I want to de-interlace the whole movie with magic bullet. Since Magic Bullet can't be used in Premiere I somehow have to import everything into After Effects which can't be done as easily. Rendering out one big AVI which needs to be recompressed to DV again by AE doesn't do the quality any good. Not to mention one big 9 gb AVI file isnt possible anyways. Also AE seems to have much less choice when it comes to output codecs it can export to...

So, what's the best way to de-interlace a total of 9 gb of DV-avi using Magic Bullet!?
Bram Corstjens is offline   Reply With Quote
Old August 21st, 2003, 05:47 PM   #2
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Join Date: Aug 2003
Location: Poplarville, MS
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Hi Bram!

I think I know what you mean. I came to After Effects being accustomed to Premiere, so it took some getting used to having to edit the composition length manually. (This is the only way I know to do it in AE.)

I would suggest working scene by scene, (doing deinterlacing, color correction, curves, etc) rendering from After effects, and then put the scenes together in Premiere for the final render. I have only done small (five minute) shorts, so I render out from After Effects completely uncompressed. (Either uncompressed AVI or just TGA frames, depending on where I have to take the footage before importing to Premiere).
I render back to DV only on the final pass.

Anyhow, reading that you have already done your cutting in Premiere and have a final render, I'm not sure which way you should go. Really, it seems that the only thing you can do is run it through the deinterlacer, and compress it back to DV once more. (I'm not sure how Magic Bullet works, as far as if it examines neighboring frames or just neighboring fields to work out its algorithms, but when I convert to 23.976p using Twixtor, I have to do it on different scenes/cuts, because it has to have consistent elements throughout the scene to morph/interpolate between. Thus I can't run the whole thing through the process.)

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