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Weird horizontal edges on movement

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Cory Lewis
Weird horizontal edges on movement
on Oct 27, 2014 at 6:01:01 pm
Last Edited By Cory Lewis on Oct 27, 2014 at 6:07:42 pm

I've been trying to figure this out.


I received a file from someone who did color correction on a video I previously worked on, he did the CC on his PC. It came back as a "animation" when I looked at the file format. I converted it to Apple Pro Res so that I can finish the output but it had these funky horizontal lines whenever someone moved on-screen.

http://i580.photobucket.com/albums/ss250/Chiryder/Mobile%20Uploads/FullSize...


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Dave LaRonde
Re: Weird horizontal edges on movement
on Oct 27, 2014 at 6:07:54 pm

This definitely sounds like a frame rate issue, and it most likely stems from not removing 3:2 pulldown properly prior to editing.

Without a painstaking description of the frame rate(s) at which the footage was shot (plus the kind of camera used to shoot it), then edited, exported and returned to you, that's pretty much the best anybody can say right now.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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Cory Lewis
Re: Weird horizontal edges on movement
on Oct 27, 2014 at 6:11:05 pm

Thank you for answering!

Does it matter that the person that did the CC could not see the problem on his end?

I'll look into the frame rates. But, I know it was shot in 24fps and output on my end as such. I didn't check with him.


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Dave LaRonde
Re: Weird horizontal edges on movement
on Oct 27, 2014 at 6:14:21 pm

The key: was pulldown removed prior to editing, and was it edited in a timeline with the proper frame rate? Was there interlacing involved?

It sounds like it probably happened on your end prior to CC.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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Cory Lewis
Re: Weird horizontal edges on movement
on Oct 27, 2014 at 8:29:17 pm

I'm sorry. Pull down?

The timeline frame rate was correct.

The file I gave him didn't have this problem, when I exported it.


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Dave LaRonde
Re: Weird horizontal edges on movement
on Oct 27, 2014 at 9:44:55 pm

Then it sounds like the CC guy did a little extra, turning a 23.976 video file into 29.97 by adding pulldown back into it. Your description of the problem sounds like what you'd see in interlaced 29.97 video.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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