October 4, 2014 at 3:08PM

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Frustrating problem with Canon DSLR footage.

Hi,

I am experiencing some extremely annoying issues with with some canon 70d footage I am editing.

https://www.youtube.com/watch?v=z3OqpaAxlwk&feature=youtu.be
This is just a few seconds rendered from my 5 minute video. It looks the worst in that shot but happens pretty much every time there is a lot of movement in a shot. In the video you will see "lines" quickly moving up and down randomly as the camera moves.
I have been searching problems similar to this and closest thing I find is the rolling shutter issue common on dslr video but this looks different to me. Does anyone have any idea what this is and if there is a solution to fix it in post?

9 Comments

I don’t see which lines you’re talking about. I watched the clip a few times, and while it looked a bit jittery (would be interesting to know what frame rate and shutter speed were you shooting with), I didn’t see any lines. Are they really tiny and perhaps only visible at 1080p?

I will say that lines moving up and down “randomly” while the camera moves sounds like an aliasing issue. Does this happen with really sharp parts of the image that have high contrast?

October 5, 2014 at 9:36AM

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Ryan Toyota
Graphic Designer / Typographer / Video Editor
1236

I am with Ryan. Bit Jittery yes but noise... :S

October 6, 2014 at 2:43AM

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Ragüel Cremades
Film producer and director
7679

I don't see it either, a little more info on what settings you're shooting on might help.

October 7, 2014 at 6:40PM, Edited October 7, 6:40PM

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Michael Militscher
Director / Commercial Producer
2492

Since I don't see it either, I will throw a wild guess that you're experiencing "screen-tearing".

I suggest trying to watch this footage on a different monitor - a new model perhaps, or something professional. If the problem is gone, then it's just your screen.

Again, just a guess.

October 8, 2014 at 2:57AM

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Daniel Falcon
Director, VFX artist
239

I think Daniel might be right. If none of us are experiencing it, there’s a good chance it’s screen tearing. You could also try adjusting the resolution and/or refresh rate of your display?

Ryan Toyota

October 10, 2014 at 1:20AM, Edited October 10, 1:20AM

Yeah.. I don't see any lines either. If it's big yellow "lines" (more like bars) going up and down the screen, that could be from fluorescent lighting. Just shutter down till they aren't noticeable.

October 8, 2014 at 3:54PM

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Will Watkins
Cinematographer // Editor
258

You get rid of fluorescent lighting flicker by matching your shutter speed to the refresh rate of the local power. So it’s not a guessing game. You just set it to 1/60th or 1/50th depending on what country you’re in.

Here’s a chart showing the power frequency in different countries around the world: http://en.wikipedia.org/wiki/Mains_electricity_by_country#Table_of_mains...

Ryan Toyota

October 11, 2014 at 4:13AM

Sam, I see "tearing" lines in the top 20% of the screen. As if the top of the screen is catching up to the rest of the image.

Is it the effect you are describing?

Please can you share with us the settings you are shooting with?

Also, are you on a laptop or a desktop?

I am watching on a laptop and I get these artifacts.

October 10, 2014 at 8:45PM

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Alex Zakrividoroga
Director
3829

Samuel no lines here either.
Probably like the guys said it's a monitor issue.
Where do you edit your footage? Have you checked that your timeline is progressive and not interlaced? (just a silly guess)..

October 13, 2014 at 10:22AM

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Apostolos Nikolaidis
Filmmaker / Director
160

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