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Importing 23.98 in a 29.97 Project

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Evan Muehlbauer
Importing 23.98 in a 29.97 Project
on Aug 31, 2015 at 9:57:38 pm

I'm cutting a project right now that is mostly shot 29.97 fps, which I imported as DNxHD. However, for one of the days only, the footage is 23.98. I'm assuming that I'll need to convert it before I bring it in. Does anyone have any recommendations? For the record, the files are a combination of mxf and AVCHD.

Thanks ~


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Shane Ross
Re: Importing 23.98 in a 29.97 Project
on Aug 31, 2015 at 11:29:15 pm

Yes. If you are on any version prior to 8.4, make a 1080p23.98 project, import and transcode the media there. And then bring the bin over to the 29.97 project.

Please tell me it's a 1080i59.94...interlaced 29.97 project and footage...and not 30p. Yes, it makes a big difference.

Shane
Little Frog Post
Read my blog, Little Frog in High Def


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Evan Muehlbauer
Re: Importing 23.98 in a 29.97 Project
on Sep 1, 2015 at 6:24:52 am

Thanks for the reply, Shane. Yes, the project is 29.97. Unfortunately, I'm cutting on version 7.0.3. Am I to take it that importing on a 23.98 project will not work? What other options are available? Can I do the frame rate conversion on a third party software?

Evan


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Evan Muehlbauer
Re: Importing 23.98 in a 29.97 Project
on Sep 1, 2015 at 6:31:39 am
Last Edited By Evan Muehlbauer on Sep 1, 2015 at 6:36:49 am

Ah, *prior* to version 8.4. I misread that. Clearly, I just worked a 12 hour day. For that matter, I think I answered your question incorrectly. The project is 1080p/29.97...


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Shane Ross
Re: Importing 23.98 in a 29.97 Project
on Sep 1, 2015 at 4:39:54 pm

[Evan Muehlbauer] "Unfortunately, I'm cutting on version 7.0.3. Am I to take it that importing on a 23.98 project will not work?"

No. If you convert...via IMPORT or TRANSCODE...23.98 footage in a 29.97 project....it will give you a warning that you are changing the frame rate...and then convert it...poorly..to 29.97. By poorly I mean it won't add pulldown properly.

[Evan Muehlbauer] "What other options are available?"

As I stated before...make a 1080p23.98 project, import the footage into that...bring the bin of the converted footage into the 29.97 project.

[Evan Muehlbauer] "Can I do the frame rate conversion on a third party software?"

Well, yes....but then you have this major issue, and yes, it is major:

[Evan Muehlbauer] " The project is 1080p/29.97..."

29.97p...not interlaced. That's a problem when mixing 23.98p. You see, when you put 23.98 into a 29.97 interlaced project (59.94i), the repeating of the frames is spread out over FIELDS...not full frames. This is called 3:2 pulldown. Google it for the full explaination. But know that this is a tried and true method...used when shooting film but telecine to tape at 29.97 to edit 29.97 and air 29.97. Pretty much how most TV shows are done.

But 24p to 30p...there is no way to spread out the repeated frames between fields...so full frames simply repeat. 6 frames to be exact. And the result is stuttery looking footage...not smooth. And it's fairly obvious. Now, if your footage has very little movement in it, you can apply promote the motion effect in it, and set it to FLUID MOTION...this will do a decent job. BUT...if someone moves their arm fast, or there's running, or driving, it'll distort the image badly.

Can't convert this in AE either...the tool for smoothing that difference out also uses tech close to Fluid Motion...distortion will occur. I know because I recently had to deal with this issue, and even my AE Artist couldn't get it converted right. So we had to live with a lot of shots stuttering, and had to explain this issue to the network, and get special permission to allow it to get past QC.

So I hope you don't have a lot of motion in those shots.

Shane
Little Frog Post
Read my blog, Little Frog in High Def


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Evan Muehlbauer
Re: Importing 23.98 in a 29.97 Project
on Sep 1, 2015 at 9:48:48 pm

Thanks, Shane. So far I imported into a 1080p/23.98 project and opened the bin in my 29.97 project. The media plays and *looks* OK to me so far. At any rate, the mixed frame rates weren't my error, so if the look isn't perfect, well, at least the producers will know it wasn't my error.


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