Canon 5D: weird brightness flicker

[Phil Balsdon]

Sample in link looks stable to me.

Cinematographer, Steadicam Operator, Final Cut Pro Post Production.
https://www.steadi-onfilms.com.au/

[Pete Burger]

I could spot a brightness change on the wall in the back. I would assume it’s the changing brightness from outside the window.
But that should be on the footage of the PWM as well… So, indeed very strange…

[Andy Taplin]

It’s definitely not the light changing as it’s only on the 5D footage. You can see the levels change on the whole image, although it’s much more noticeable on the BG.

I assume in manual mode there are no ‘gotchas’ where there is still some auto exposure compensation going on?

[Pete Burger]

Did you set the “highlight tone priority” and “auto lightning optimizer” to off? In some cases they produce strange artifacts – at least on my T2i and the 7D.

[Andy Taplin]

Auto Lighting Optimiser was set to standard, so maybe that was it. I’ll try some tests

Thanks for the replies

[Chris Wright]

also, just to see if I could fix your footage, I made a quick auto fix after effects project. it auto fixed your white balance and flickering exposure.

ae cs3 aep
https://www.mediafire.com/?snyc3empeaea2bk

a gui script for enabling expressions(if you scrub, sometimes they get disabled)
https://www.redefinery.com/ae/view.php?item=rd_ExprTweaker

https://technicolorsoftware.hostzi.com/

[Andy Taplin]

Thanks Chris that ‘s really good of you 🙂 I’ve tried the AFX effect in the past that’s supposed to even out exposure without much success.

[David Williamson]

Any chance you could re-post that auto-exposure fixing AE project? I’ve run into the same issue with exposure flickering…

[Chris Wright]

https://www.mediafire.com/?fz0s3i85a45ou58
from thread
https://forums.creativecow.net/thread/50/857931#857958

if you un-hide the final output comp, and enable the top empty text layer, it will show numbers in your comp. If it says around 25 (+-5 deviation) from gamma clamp slider, the flicker will be removed automatically.

it may need a new keyframe for a new scene to scene change, but for the most part, it’s fully automatic. obviously before you render, turn the text layer off.

also, if you’re interested, I made a highlight restore program that recovers blown out spots in video >2x adobe’s RAW capability too.
https://www.mediafire.com/?o5724wvxd07mkv7
from thread
https://forums.creativecow.net/thread/2/978546#978880

https://technicolorsoftware.hostzi.com/

[Dean Barker]

can you tell me how to apply your auto fix filter? – i’m very green with after effects so explain it like you would to a newbie – thanks!