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23.98 FPS capture
When I capture 23.98 footage and play it back it is not smotth and it looks like the are fields added to it. I captured this frame rate before and it played smoothly, then I installed a Kona 3 card and now my footage isn’t playing back smoothly
I’m running aG5, OS 10, and FCP 5.1.4
Any sigeastion or am I just missing something?
George
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10 Replies
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What codec are you editing in? What was the footage shot on? Are you capturing 29.97 or 59.94 footage as 23.98? Sounds to me like that’s what’s going on and the fields you’re seeing are pulldown that wasn’t removed.
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What are you digitizing? What settings are you using?
If your footage is 23.98, it shouldn’t have any interlaced frames which means something was probably off when it was captured.
-Russ
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It was shot on HD then downcoverted to 23.98 letterbox on a Digi-beta, I’m using the AJA 23.98 10 bit setting to capture, I checked the tape and there is no pulldown on the tape.
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So you’re sure there’s only 24fps on the Digibeta – so that it looks like it’s running fast when you play it back? because digibeta must run at 29.97, and very few video systems use that 24fps on a digibeta trick.
Then in that case, capture everything as 29.97 fps into FCP, and then have Cinema Tools conform the frame rate of your clips to 23.98 without doing any pulldown conversions.
presto!
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Cool,
thanks
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[Frantic] “It was shot on HD then downcoverted to 23.98 letterbox on a Digi-beta”
Digital Beta is a 29.97 format. I know you said that you checked the tape and didn’t see a pulldown, but I’m going to bet that it is there. Try digitizing a section in at 29.97 and then opening up the file in Cinema Tools.
If there is a 2:3 pulldown on the tape (which is standard industry practice), then you can either digitize in at 29.97 and remove the pulldown in Cinema Tools or you can digitize in at 23.98 if you set your in point to be an “A” frame.
(You might need to adjust the frame offset in the device control presets if you’re doing a batch capture. I’d be happy to explain more on this if you need it.)
-Russ
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I figureded I would have to capture on the “A” frame, Stupid question…how can I tell what an “A” frame is? Is that an even frame (2,4,5…etc) Which I did but some clip are still jittery.
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A 2:3 pulldown has a cadence of Progressive, Progressive, Interlaced, Interlaced, Progressive.
So digitize in a short section and scan through it (if you’re using QT, make sure that High Quailty video is enabled under the Visual Settings).
Once you find a interlaced frame, go back two frames. That will be the A frame. (Telecine houses put the A frame on frames 0 and 5 usually)
From there you need to digitize in a section at 23.98 starting with the A frame. If you still have interlacing, you should change the frame offset under the device presets until it captures correctly. (I went through this last week with AJA support)
Good Luck!
-Russ
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Success!!
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Nice!
-Russ
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