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Fields in 24P and then something funny happened
I just spent the day going back and forth on the AE forum with some very helpful people. Made things clear for me. Here’s the situation, because there’s a PP question at the end of this.
I shot some DVCPRO50 24P footage. I had a complete stranger capture it for me at 8 bucks an hour (yeah, I know.) He captured one single file for each 30-minute tape. Each file is read at 23.98. What I didn’t know at the time was that this formula was doomed from the start.
There are now fields in my 23.98 footage. The folks on the AE forum schooled me good, saying that when a camera starts and stops between takes, it resets the pulldown cadence. So you have to capture one shot at a time. This is why AE couldn’t “guess” the pulldown, except when I cut the clip down to a single take. In any case, I have a lot of greenscreening and compositing to do, so I had to figure out a way to deinterlace the 23.98 footage, which is asking for trouble since the 23.98 capture discarded much of the tapes’ information.
So I went in PP 1.5 and, just for fun, exported a single clip (with a constant pulldown) and I put a check mark next to “Deinterlace”. I’m not sure what I was expecting, but I certainly didn’t expect it to do what it did.
It deinterlaced the clip.
I did it more than once. Each time, the new file imported into AE, no fields to speak of, ready for keying.
It can’t possibly be this easy. What am I missing? What will this look like on a good monitor?
Thanks for any input – SGM.
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4 Replies
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I think you will probably notice that your footage is now much smoother 😉
But not in a good way; by that I mean that Premiere probably interpolated one of the fields, and you basically lost half of your resolution. Maybe other can weight in on this since I don’t work that much with 24P.
Vince
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From my limited knowledge, if you import the original clip in AE and use ‘interpret footage’, set it to non-interlaced and interpret as 24 fps, your duration should change and everything ‘should’ be right…
Can’t you just capture a little bit the way you wanted it in the first place and compare?
Bouke
Bouke
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[Vincent Becquiot] “and you basically lost half of your resolution”
Does this apply to every single frame, or only the visibly interlaced ones? I’m trying to avoid recapturing. Money, money, money.
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Yes, using Premiere to deinterlace I believe will cause you to lose have of your temporal resolution. All bets are off as far as quality goes. You will probably also get a very jagged playback in motion areas.
Vince
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