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Old April 10th, 2006, 06:04 PM   #1
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30p to 24p?

I recently shot about 7 hours of footage for my Senior Thesis Film on an XL2. Somehow I knocked the switch from 24p to 30p for about six minutes worth of footage. What is the best way to manipulate this footage so it looks like 24p and doesn't stick out like a sore thumb? (It's all essential footage, so I can't just scrap it!)

Thanks guys and gals.

Corey
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Old April 11th, 2006, 12:09 PM   #2
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Corey,

Does the sound have to sync? If not, then the easiest way is to just Interpret the footage as 24p. It will run 25% longer, and look slightly slo-motion. I do this all the time as an effect or for insert shots, since 60i->30p->24p looks much cleaner than 60i->24p.

If you do have to sync the sound, then it's tougher. The 24p conversion programs all tell you not to shoot 30p under any circumstances. Twixtor/FieldKit might be better. It requires you to deinterlace prior to changing frame rates anyway, so maybe it can handle it. I've never tried.

Josh
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Old April 11th, 2006, 02:56 PM   #3
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Corey,

If you are editing in Vegas, just drop it on the timeline and it will match so very close that I bet you could play "Stump the Chump" with friends and tell them that one clip in this 5 minute segment is 30p instead of 24p and I'll bet you'll stump many of them.

Now your film instructor might be able to tell the difference, but then only if you tell him it is somehow different, otherwise, it'll look like progressive footage "filmed in better light".
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Old April 11th, 2006, 03:24 PM   #4
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What edit system are you using?

For FCP there is www.nattress.com Film Effects for $99. But, FCP can also do the drop in the timeline and render and it will match the 24P stuff well.

Try it.
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Old April 11th, 2006, 07:02 PM   #5
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Oops,
Corey, I should have looked at your profile. With a G5 you are obviously NOT using Vegas. If FCP will mix media like Vegas, just throw it on the timeline where you were going to place it and I doubt anyone will notice the diff when you render the final product.
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Old April 11th, 2006, 07:42 PM   #6
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twixtor is the way to do it, check cinema tools as well
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Old April 11th, 2006, 10:53 PM   #7
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edit the project in a 29.97 time line ..
IMO if you do not want it to stick out like a sore thumb do NOTHING.
the 24p must be 29.97 for NTSC playback .. it was recorded to tape with pull down so it's already at 29.97 ... so the 30p plays back at 30p(29.97) ..
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Old April 12th, 2006, 12:07 PM   #8
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Don is correct... 29.97 interlaced to 24P is easy but TRUE 30P to 24P looks like junk. I assume the people saying it looks good are REALLY talking about 29.97 interlaced to 24P.

There is no practical way to overcome it because in order to get 30 to 24 they use the interlace fields to do some sort of blend. If you go 30P to 24P you will just lose 6 frames which looks like junk. Edit the whole thing in 29.97, which is where it will end up anyway.

I love the look of 30P but you should never use it for anything other than NTSC 29.97 delivery, it does not bump to film or transfer to 24P or PAL without looking very poor.


ash =o)
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Old April 13th, 2006, 10:23 PM   #9
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Thanks everyone

Thanks everyone, you've given me some food for thought. Sounds like there's no perfect fix... that's what I was afraid of. If I can get ahold of some of the aformentioned software, I'll see how it looks, otherwise I may just have two minutes that look more like video. Next time I'll pay more attention to my camera settings!

Last edited by Corey Aumiller; April 13th, 2006 at 11:10 PM.
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Old April 16th, 2006, 05:55 PM   #10
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Actually no. 30p is a lot better looking than 24p. I just finished film school and we do everything in 30p because 24p sometimes when you compress it. starts to look like bad. and i have noticed that 30p keeps it quality when compressin it. now dont get me wrong 24p is great and i have done a lot of projects in 24p. I guess what is boils down to it wich one you like better you really cant go wrong with either one of them.
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Old April 16th, 2006, 06:08 PM   #11
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That's pretty subjective.

Any framerate -- 60i, 24p, 30p -- has its shining uses. 60i looks better for sports and reality shows. 24p tends to look better for drama, narrative film work, etc.. 30p is a nice compromise between the two.

I strongly disagree that 24p "starts to look bad" when you compress it, if you do it properly. If it looked great to start with, then it should look great when you're done, else you did a poor compression job.
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Old April 16th, 2006, 06:11 PM   #12
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Quote:
Originally Posted by David Jimerson
That's pretty subjective.

Any framerate -- 60i, 24p, 30p -- has its shining uses. 60i looks better for sports and reality shows. 24p tends to look better for drama, narrative film work, etc.. 30p is a nice compromise between the two.

I strongly disagree that 24p "starts to look bad" when you compress it, if you do it properly. If it looked great to start with, then it should look great when you're done, else you did a poor compression job.
yeah you have a very good point. this was just a suggestion that was made from one of my teachers. probably cause they wer not doing something right.
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