59.94i misinterpreted

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J_1980 Author

Level 1

8 points

59.94i misinterpreted

Hello!

I have been working with the same 59.94i footage in Final Cut X for the past three years. I upgraded from Final Cut X 10.3 to 10.4, and now all of my 59.94i footage is being interpreted by Final Cut as 29.97i. When I de-interlaced the footage previously in 10.3, it would convert to 59.94p. This is important to my project because I use a lot of slow motion.

I have previous exports of my footage (exported with 10.3), and when compared frame by frame to the a current export (in 10.4), the frame rate is clearly different.

The 59.94i frame rate footage is shown in Final Cut as 29.97i, no matter what the frame rate of the project is.

I am have used the same computer through out. It currently runs on: 13inch macbook pro, early 2011, with MacOS 10.13.2. 16GB Memory.

Thank you for any suggestions.

Final Cut Pro X, macOS High Sierra (10.13.2), 16GB Ram

Posted on Dec 22, 2017 2:26 AM

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Answer 1

Top-ranking reply

tsmcafee

Level 1

8 points

Jan 26, 2018 3:03 PM in response to J_1980

I think I found a solution.

Back story:

I film 60i on C100 mark i. I used to import to Final Cut Pro and then deinterlace which would result in 60p clips which I would slow down 40% and the result was smooth slow motion. Doing this same process in in FCP 10.4 failed to work and resulted in, what looks like, 40% of a 24p clip.

Fix:

Decided to try to slow down before deinterlace. Result is smooth 40% slow motion again! The clip still says 29.9i in info. I do not see lines in my footage. Not sure what is going on here but it works for me so I am happy. Let me know if you have the same result.

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Answer 2

Jan 17, 2018 5:50 AM in response to J_1980

Canon C100 MK II records up to 60p, I can't remember right now if only in MP4 mode or also in AVCHD. The 60i trick was for C100 MK I because it only could do 60i in AVCHD. Yesterday I was also struggling with it, previous versions of Final Cut Pro X recognized 60i files as a some sort of 60p files when deinterlaced, but if now if you deinterlace and apply manually 40% playback as speed, it seems the result is the same as before (have to double check this). I've tested with C100 MK I footage. If you are shooting with C100 MK II, I suggest that you work in 60p mode as it will be so much easier and quality will be lot better.

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Answer 3

J_1980 Author

Level 1

8 points

Dec 22, 2017 4:54 AM in response to Tom Wolsky

The camera I shot with was the Canon C100 Mark ii, which captures slow motion in the "60i" setting. Here is an example of someone else who converted their C100 60i footage to 60p, and it is a clear 60 frames per second.

https://www.youtube.com/watch?v=PdtF3YUZ_o0

In FXP 10.3 (and earlier) I was able to de-interlace, and the footage would read in the info box as 59.94p.

This post here explains the method I was using and it always worked ok.

http://noamkroll.com/turn-60i-into-60p-for-24p-slow-motion-with-one-click-in-fcp -x-essential-for-c100-any-other-camera-l…

I took the footage I exported last week, and compared it frame by frame with the footage I exported after upgrading to Final Cut 10.4, and the quality for each image is exactly the same, the only difference is that only half the frames are there for the parts that are slowed down in the project (for the parts where there is no slowing of the footage, they two are the same).

I should have de-interlaced my footage to 60p before editing so not to run into this problem, but since Final Cut was de-interlacing for in me in the program, I didn't see the need. Now I've lost half my frames, and am considering reinstalling Final Cut X 10.3.

Any other thoughts are appreciated.

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Answer 4

J_1980 Author

Level 1

8 points

Dec 22, 2017 12:14 PM in response to Tom Wolsky

It really is 60fps, it's in the camera manual, and you can see it clearly in the footage I linked to above. I deinstalled FXP 10.4, and reinstalled 10.3, and now the extra frames are back, but the footage is not de-interlaced. I see every frame, but it has lines in the movement. If I compare this to my export from last week, it look awful.

I spoke with Apple for over an hour, and it's possible it was the upgrade in my OSX to High Sierra. As of right now, I am back to using Final Cut X 10.3, the footage is read by Final Cut as 29.97i, and I am unable to de-interlace it.

Maybe the C100 is the only camera that creates these types of files, so it is not a common issue.

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Answer 5

Tom Wolsky

Level 10

152,805 points

Dec 22, 2017 12:18 PM in response to J_1980

Is there any chance you could share a clip of this media J_1980? I'd really appreciate it. DropBox. WeTransfer. Whatever you go do would be great. If the media can't be shared I understand.

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Answer 6

tsmcafee

Level 1

8 points

Jan 27, 2018 1:25 PM in response to J_1980

Have this same issue. I found that you can slow down the footage before deinterlace and it is smooth slow motion. Only issue is, it is still interlaced... Hard to tell but still there. Did you find any solution?

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Answer 7

Tom Wolsky

Level 10

152,805 points

Dec 22, 2017 6:38 AM in response to J_1980

Is it really 59.94i? I thought only a defunct Samsung camera shot that. Could you post a piece of this media somewhere? Would love to compare it in the two OSs and versions.

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Answer 8

tsmcafee

Level 1

8 points

Jan 26, 2018 2:09 PM in response to J_1980

Having the same issue. Have you found a solution yet?! Filming on c100. Shooting in 60i. I used to import the 60i footage and then deinterlace. The clip would then show up as 60p and I would slow down with smooth slow motion results.

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Answer 9

tsmcafee

Level 1

8 points

Jan 28, 2018 4:26 PM in response to J_1980

another development in a search for a solution. Going back to version 10.3, I do not see interlaced lines on 60i interlaced clips I import. When I import 60i clips into version 10.4, I see interlaced lines. When I deinterlace these clips in 10.4, I still see interlaced lines... not sure what this means but it is handling these interlaced clips differently in 10.4.

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Answer 10

tsmcafee

Level 1

8 points

Jan 27, 2018 1:26 PM in response to tsmcafee

just found that interlaced lines are visible, which makes sense. However, difficult to see....

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Answer 11

Tom Wolsky

Level 10

152,805 points

Dec 22, 2017 3:57 AM in response to J_1980

With the exception of one camera, that was short lived and long gone thankfully, there is no such thing as 59.94i. That was a stupid designation used by camera manufacturers. What they mean when they say 59.94i is 59.94 interlaced fields recorded at 29.97 frames per second. 29.97i is the correct designation. 29.97 frames of interlaced video. When you made it 59.94 you threw away half the resolution to make a full frame out of each field. Interpolation might make it look a little better but that’s what happens when you use the basic setting.

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