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Questions Re: frame rate for HD edit
Below is an e-mail from a producer that I will be working with at the end of sptember. Can anyone answer this?
Thanks in advance
Biker
The Varicam has variable frame rate. We plan on shooting some 60p
footage, which is the equivilent of shooting 120 frames per second for film. When transferred, the footage will be super slo mo, ala NFL Films. In the past, I’ve worked on a AVID Nitris, and the editor has put the footage
through an interpolation and time warp function which basically “transfers” the 60p footage into slo mo, it runs it at 23.95 or whatever the frame rate is for video. Does Final Cut Pro have a similar function? -
12 Replies
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Yes, the frame rate converter does this. Or you can “conform” in Cinema Tools to 23.98fps.
Graeme
– http://www.nattress.com – Film Effects and Standards Conversion for FCP
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Yes.
What Graeme says, and you also get a Kona 2 card that will convert your 60p footage to slo mo 23.98 upon digitizing.
Otherwise you digitize the 60p footage at 60p and run it through the free frame rate converter plug in that panasonic provides. Digitizing on the fly with Kona 2 saves you some steps. You have to use the DVCPRO HD codec in order for this to work.
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G5 Dual 2Ghz <> 4GB RAM <> FCP 4.5 <> Kona 2ATTO 42XS <> Huge Systems 1.25 TB 4105 Fibre
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Please expand on the Kona 2 portion of your post. Are you saying that the Kona 2 is a smooth 60i to 24P downconverter and that you can do this on capture? Also, why only DVCPRO HD why not 10-bit uncompressed as well?
David
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[David Battistella] “Are you saying that the Kona 2 is a smooth 60i to 24P downconverter”
Nope. Varicam has the ability of shooting variable frame rates. It is a rather long technical explanation of how it exactly works that is not appropriate to go into here. I’m sure you can find technical details around the web, maybe a varicam manual to start, or perhaps over at ken stone’s site for some plain english http://www.kenstone.net. In fact here’s a link after a quick search that will help explain the varicam workflow (without the kona 2)
https://www.kenstone.net/fcp_homepage/dvcpro_hd_workflow_balis.html
The Varicam shoots 60p (not 60i). It also shoots frame rates between 4 and 60 frames per second progressive which you can then convert to slow down or sped up footage.
You can capture uncompressed using the Varicam specified easy set ups (for instance 8 bit 23.98 Varicam), but you won’t be able to use the software frame rate converter because it only works with the DVCPro HD codec and the embedded rp-188 stream. Capturing uncompressed can only happen when your shooting frame rate matches your playback frame rate. In order to get the full functionality of the over or under cranked footage you must digitize at 60p (59.94) in the DVCPRO HD codec and then use the software frame rate converter plug-in (which is free from Panasonic’s website) to get you to the intended speed. Hope this is a good starting point.
Jeremy
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G5 Dual 2Ghz <> 4GB RAM <> FCP 4.5 <> Kona 2ATTO 42XS <> Huge Systems 1.25 TB 4105 Fibre
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Jeremy,
I mised the Varicam component in this post. I thought we were talking HDcam. FCP and the Varicam are a very good solution for the post workflow described inteh original post. I have some HDCAM 59.94 that needs to be slomoed and downconverted to 23.98 and I think I was hoping I had found a solution.
David
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You may want to point out to the producer that shooting 60P will be like shooting 60 frames per second on film, not 120 like he originally stated.
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But you’d drop a generation coming in over HD-SDI into a K2 and setting the codec to DVCproHD…..
Graeme
– http://www.nattress.com – Film Effects and Standards Conversion for FCP
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David, there’s a new plugin going into my Standards Conversion package that will do a very smooth 60i to 24p conversion via slowing down the video so each field of the original gets mapped to a 24p frame, and it looks great. That gives you a lovely 40% slowdown…. I should, with luck, be releasing the new pacakge in the next few days….. But drop me an email if you want to know more.
Graeme
– http://www.nattress.com – Film Effects and Standards Conversion for FCP
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WOW!
Can’t believe all the great responses to my question! This is without a doubt the best forum I have ever been on!
Thanks to all for the great info! What a help!
Biker
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If Graeme releases a plug in then I would definitely check it out. He gets nothing but praise around here. I have been point to a website before that tells you how to get slow 24p out of 60i footage using after effects tricks. You can read up on it here: https://www.rarevision.com/articles/slow_motion.php#
There are a few quicktime example of what it looks like. I would also email Graeme.
Jeremy
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G5 Dual 2Ghz <> 4GB RAM <> FCP 4.5 <> Kona 2ATTO 42XS <> Huge Systems 1.25 TB 4105 Fibre
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