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converting 23.98 to 29.97
I’ve just finished editing a 35mm short on FCP. They gave me DV work tapes which I reversed telecined so I could edit 23.98 but now sound would like a 29.97 quicktime for the sound edit. I exported my 23.98 sequence and reimported it into a 29.97 sequence. Is that the right way to do it? Any advice would be appreciated.
thanks
Pamela Bayne
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6 Replies
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Why do they want that? If your project is 23.98, they should be sound mixing at 23.98. ProTools is capable of this…what are they using to mix?
What is your intended delivery format? and will it still be 23.98 or 29.97?
Shane
Littlefrog Post
http://www.lfhd.net -
The easiest ways to make 29.97 from 23.98 are to:
render it in Final Cut Pro, by placing your 23.98 sequence within a 29.97 and rendering, or export, import, and rendering, such as you’re doing.
Use After Effects, which has a feature to add 3:2 pulldown, thus turning a 23.98 to 29.97.
But as Shane has stated, this is an unnecessary complication, especially if they are working with a quicktime file. It made some sense in earlier times when sound was editing to a 29;97 videotape as the only visual sync source.
The simpler the post pathway, the less chance of problems. How are you finishing? Figure that out, and work backwards to decide how to proceed.
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I believe that if you export your edit as a self-contained DV movie, it will make it a 29.97..but not sure how it will do reverse pull-down or repeat frames and such. It may repeat a frame here and there, but should stay along the original time sync as the 23.98. And then they can use that in Pro Tools or what have you. Once they’re finished with the sound edit/mix…if they export a mixed-down AIFF stereo track, it should sync up in your 23.98 timeline just fine as long as everything was synced to the same 2-pop frame. AIFF’s and sound files don’t really run at frame rates like video…frame rates really only apply to an editing timebase in which you will be editing the sound…but that same sound file can play continuously in a video timeline that is 24, 30, or 15 frames per second…you can only edit it in there at whatever frame rate the timeline is set.
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I’m not totally sure why they want 29.97, they are a reputable post audio house and this is my first time working with 35mm so I just presumed they know what they’re doing. As for finishing, we’re doing a DI, I need to talk to the post production supervisor about whether its 23.98 or 29.97.
Pamela Bayne
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You know what I noticed when I put my 23.98 edit into a 29.97 sequence? It knocked some of my shots off my 1 frame. Outputting it as a DV quicktime and reimporting it seemed to work but apparently it’s a poor man’s pulldown, I mean it will work as a reference file for the audio but it’s not the best way of doing it. I read that After Effects can do it better.
Pamela Bayne
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thanks!
Pamela Bayne
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