60i Slow motion in a 23.98 timeline

mikeshu

Well-known member
Hi guys,

I was wondering if you guys can help me out with bit of a technical question. I read Barry Green's book on the DVX100 and was experimenting with slowing down 60i by 40% in a 23.98 or 24P time line. Apparently this works perfectly fine in other NLE's as I read on DVXuser.com, but in FCP this produces stuttery movement. I read the book again and again, tried many different filters such as de-interlace and flicker removal, but I still get a choppy (or choppier) result.

I then imported the 60i footage into After Effects, and slowed it down within a 23.98 composition, and exported as a 23.98 footage. When I re-imported into FCP, it looks almost perfectly smooth. However, there was a flutter between the fields from frame to frame, as if it were doubling the fields every other frame. Checking on "Interpret Footage" and playing round with the field ordering didn't really do much help. Besides I would very much rather do it within FCP rather than to be required to go to After Effects or Shake (which I have yet to acquire) to get the desired slow motion result.

My question is if anybody has successfully made glass-smooth slow motion from 60i footage into a 23.98 timeline within FCP. Mr. Green suggested that I'd ask the FCP group to see if anybody has had success.

Thanks everyone in advance for their responses!
 
Haven't tried it myself, but the add-on that gets mentioned a lot for FCP speed effects is Twixtor. Try googling that one. I think it works as a stand alone and a FCP filter. Using just what FCP offers out the box, you're not likely to find a tone of success, FCP's just not the best for speed changes unfortuneately (at least not in my eyes in my experiences).

cheers.
 
Frame Rate

Frame Rate

You did not mention "Shutter speed" - did you set it as per the book?
This will make sure that your shutter is not going to interfere with the final look.

I would not say the 60i slo-mo is like glass but it is pretty good. You could de-interlace it in Motion or other similar apps but I have not spent that much time on it to say for certain that it is noticeably better.

good luck
 
The Frame Rate Converter is actually the "DVCPRO-HD Frame Rate Converter" and is in the Extras folder of the 5.1 installation disk. With 5.1.2 it now installs automatically.
 
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