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HDX900 footage, the FS100, and the FRC
Ok so, I had a nice day at the beach playing with the HDX900 all to FS100. I played with every frame rate and resolution. Now I get home and import it into FCP and to my surprise the FRC can’t handle the 1080i footage at all. Either nothing happpens or I get an error message about only working with 720p footage.
Is this just a product of the FS-100 P2 mode ? Whats the workflow for off speed footage at 1080i if not ?
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10 Replies
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The FRC is strictly for 720p. Slow motion and fast motion effects are possible because you are shooting 60 frames a second. 1080i is interlaced, and there is nothing which can be converted for effect. What you shoot, is what you get. (24pA being the exception, but not part of the FRC)
Chris Bell
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I’m struggling a bit with this. Varicam is always 720p/60 no matter what frame rate you choose. It just pads the extra frames and hence the need for the FRC.
The hdx900 is still recording 60fps even in 1080i mode right? Whats going to those frames at 1080i/24p if so ? I’m curious because 1080i/24 in FCP looks alot like 720p/24 before you apply the FRC to it.
I would have figured it was just flaging the footage to be automatically uprezed and stil recording 720p/60. There a paper somewhere that covers dvcprohd’s version of 1080i ?
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The FRC is only for frame rate conversion- i.e. variable frame rate- undercranking and overcranking. It is *not* part of the pulldown removal to resolve 60p to 23.98.
Noah
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The HDX is a duel format camera. It can record either 720p or 1080i. When you shoot 1080l, you are laying down 1080 60i to tape. When you shoot 720p, you are laying down 720 60p to tape. When you shoot 24p in 1080, a pulldown is added to get you to 29.97.
You can only use the FRC with 720p footage, and your choices are limited with the HDX.
Chris Bell
PS: anyone know if you can frame rate convert 60p footage from the HDX with the FRC for slow mo effect? Is 60p flagged like a varicam?
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I’m not talking about doing pulldown from 60 to 24. I mean when you shoot 24p on the Varicam you have to run the footage thru the FRC to strip out the extra frames correct ? I didn’t mean shooting in 60p just that the Varicam is always recording at 60p. I’m curious how 24p in the 1080i mode works is all.
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So, the HDX in 1080 mode is recording differently for each of the 1080i frame rates unlike 720 when its always 60fps to tape ?
I was thinking it did something like always recording at 1080/30p and flag frames like the 720 modes. So there are no extra duplicate frames to worry about stripping and hence no need for the FRC ?
Now to confuse me a bit more why does it refer to all the modes as 1080i modes when some use progressive frames ? Is it outputting interlaced footage when recorded at 30P ?
Sorry if this basic stuff I should know but, I’m brand spanking new to 1080i. I’ve been using the Varicam so long my brain is having trouble adjusting.
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There are three DVCPRO HD recording standards that are available int he 900.
DVCPRO HD Varicam 720 60p records 960×720 pixels 4:2:2 with 6:1 compression
DVCPRO HD 1080i 60i records 1280 x1080 pixels 4:2:2 with 6:1 compression
DVCPRO HD 1080i 50i records 1440×1080 pixels 4:2:2 with 6:1 compressionThe 1080i 50i standard has the most pixels per frame and could be considered for 24p projects but bearing in mind that the camera head is 1280 x720 pixels.
Mike Brennan
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Ok so its always shooting 60i (or 50i) even in the progressive modes and the pulldown is done just like the dvx100 correct ? https://eww.pavc.panasonic.co.jp/pro-av/support/mvp_e/user/point/dvx100/24p24pa.htm
So no need for a FRC.
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Hi there,
I think you are confused. The FRC is ONLY for off speed footage. If you are shooting 24 and working in a 24fps time line then you don’t do anything. When digitizing you have the option not to capture duplicate frames, but that has nothing to do with the FRC. As far as always shooting interlaced….no.
Cheers,
Nick Gardner -
Well if you didn’t choose that option then you would. I never even noticed it till you mentioned it. You also need the FRC to bring in 60p footage as slow motion. I’m not an editor by trade in case you can’t tell by my struggle with this 😉
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