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Frame Rate confusion.

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Sina Ghi
Frame Rate confusion.
on May 11, 2014 at 4:29:24 am

Hey there !

I conduct video interviews, shooting from 2 different angles with 2 Canon 7Ds. Usually, both cameras are set to 1080p 30fps. Then I convert them to PRO RES and edit on Final Cut Pro.

Unfortunately, during my last interview, one of the Canon 7Ds was recording in 720p 60fps (by accident).

Now it's time for me to edit the interview, I converted the 1080p 30fps footage to PRO RES like I usually do, but what about the 720p 60fps footage, should I convert it to PRO RES 720p 30fps instead of keeping 60fps ?

Someone please help.
Many thanks.


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Edwin Street
Re: Frame Rate confusion.
on May 11, 2014 at 5:39:37 am
Last Edited By Edwin Street on May 11, 2014 at 8:06:03 am

When you convert to ProRes also convert the frame rate to 30. It wouldn't entirely matter because when you drop it into the timeline it will convert anyway to 30fps but it's good practise to do it before hand.

The H.264 codec on the Canon 7D is very good so I'd recommend using ProRes 422 (HQ) if you want to keep all the detail. But this really depends on how powerful your computer is if you are to edit with this codec.


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Warren Eig
Re: Frame Rate confusion.
on May 12, 2014 at 3:05:52 pm

Don't use ProResHQ. You'll get no benefit unless you are shooting 2K or above. You'll just use more disc space.

Warren Eig
O 310-470-0905


email: warren@babyboompictures.com
website: http://www.BabyBoomPictures.com


REEL: http://www.babyboompictures.com/BabyBoomPictures/Reels.html


For Camera Accessories - Monitors and Batteries
website: http://www.EigRig.com



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Edwin Street
Re: Frame Rate confusion.
on May 14, 2014 at 7:12:09 am
Last Edited By Edwin Street on May 14, 2014 at 7:13:31 am

No there is a benefit to using ProRes HQ, I've converted 1080p 7D files and have studied the difference. Canon 7D uses a GOP structure of M=1, N=12 so each of these frames becomes an i-frame when converting to ProRes. H.264 is, currently, the best encoder (file/size) at keeping detail from frame to frame so the more bits you can throw at it when encoding to i-frames the better. Hard drive space is so cheap these days, there's no reason not to use HQ if you want the video to look better. But it depends on how attached you are to your work... if it's going on TV and you're not going to look twice at it once it's done, go ahead and use 422, but if it's for a personal film, then HQ or higher is the way to go. Nothing is ever going to look as good as the original file, unless you convert it to uncompressed/lossless.


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Warren Eig
Re: Frame Rate confusion.
on May 14, 2014 at 3:30:04 pm

Yes there is a benefit to converting to ProRes as h.264 is GOP and ProRes is I-frame. What flavor of ProRes is where we disagree. Read Apple's white paper on ProRes. You gain nothing from HQ variety when shooting with the 7D. If you perceive there is a difference, it is not on the scope, just your preception. The HQ variety is for 2k or above.

Warren Eig
O 310-470-0905


email: warren@babyboompictures.com
website: http://www.BabyBoomPictures.com


REEL: http://www.babyboompictures.com/BabyBoomPictures/Reels.html


For Camera Accessories - Monitors and Batteries
website: http://www.EigRig.com



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