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Frame Rate Conversion Issues

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Odille Grouillard
Frame Rate Conversion Issues
on Jan 13, 2016 at 5:53:35 pm

Hi guys,

We shot some footage at 120fps on an iPhone. I then converted it from H264 to ProRes HQ 422 in MPEG Streamclip. Then in FCP7, I viewed it in Cinema Tools and conformed the 120fps footage to 24fps. Pretty standard.

The issue I have right now it that every 8th frame or so, a frame is doubled. Not the smooth 120fps footage but some clunky, jagged playback.

Do any of you have any work arounds for this specific issue?

Any help would be great,
Odille


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Shane Ross
Re: Frame Rate Conversion Issues
on Jan 13, 2016 at 10:25:45 pm

Scroll through that iPhone footage...do you see any repeated frames there? Might be tougher as it's more frames, and less difference between frames...

Shane
Little Frog Post
Read my blog, Little Frog in High Def


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Odille Grouillard
Re: Frame Rate Conversion Issues
on Jan 14, 2016 at 12:37:38 am

Hi Shane,

It's hard to tell but it looks like there are repeated frames. I tried taking them out individually but it doesn't look much better.
Is there any way to fix this?


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Dave LaRonde
Re: Frame Rate Conversion Issues
on Jan 14, 2016 at 3:09:28 am

120 fps shot on a nice GoPro, perhaps? Something that's actually a camera and not a phone impersonating a camera?

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


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Odille Grouillard
Re: Frame Rate Conversion Issues
on Jan 14, 2016 at 3:45:43 am

I'm fully embracing the clunky nature/general crappiness of the iPhone camera. I would just like to fix this one issue.
Has anyone had any luck with plugins like Duplicate Frame Remover?


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Dave LaRonde
Re: Frame Rate Conversion Issues
on Jan 14, 2016 at 3:33:01 pm

Since you put it that way, I say leave the footage alone. You're denying one of the more annoying aspects of the camera by trying to fix it. I say go whole hog for maximum effect.

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


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Dave LaRonde
Re: Frame Rate Conversion Issues
on Jan 14, 2016 at 4:42:06 pm

In other words, embrace the poor quality.

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


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Odille Grouillard
Re: Frame Rate Conversion Issues
on Jan 14, 2016 at 9:14:59 pm

Alright.
Thanks Dave!


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