Correcting the mess from the camera's auto-exposure feture
by Blahtor Magnus
on
Jul 25, 2008 at 12:54:37 pm
How to use AfterEffects to correect the Mega-Annoying flicker, produced by the auto-exposure of a camera?
I read that it is possible via the track & stabilize function but the article didn't say anything more than that.
This is what it says: AE's improved motion tracker will undoubtedly find myriad uses: to stabilize action footage shot with a long lens; level a seasick camera bobbing at sea; or remove the annoying breathing of the camera iris in footage recorded with auto-exposure. Previously, this footage often had to be discarded. But thanks to AE 6, the white point in a scene can now be tracked and continuously corrected to offset the gyrations of a camera iris attempting to render the world and everything in it as 18% gray.
I don't really understand how it is used to stabilize the flicker...
Re: Correcting the mess from the camera's auto-exposure feture by david bogie on Jul 25, 2008 at 5:52:20 pm
"Auto-exposure mess"? Do not use automatic anything on a vide camera.
but you have described a motion compensation routine, not a process that involves exposure grading.
After Effects can be used to do grading but it is not ideal. You open the color correction filters and start trying to figure out which ones might work. You need to have a vectorcope and waveform monitor available, either as software tools or hooked to an output device.
Then open the Color Finesse product's manual. Remarkable tool.
> Note: The Color Finesse plug-in included with After Effects includes excellent tools that can help you keep your colors within the broadcast-safe range. For more information, see the Color Finesse documentation in the following folder: Adobe After Effects CS3/Additional Documentation/Color Finesse 2.
bogiesan
This is my standard sigfile so do not take it personally: "For crying out loud, read the freakin' manual."
Re: Correcting the mess from the camera's auto-exposure feture by Blahtor Magnus on Jul 25, 2008 at 11:58:14 pm
I don't know.
I thought that the article that I quoted in my first post said that you can track a white spot in a footage and use the tracked data for your luminocity corection needs. Or something like that...
But it may be my bad English. Maybe I misunderstood it all.
PS:
As for turning the auto-exposure on your cam off: Ican't do that. My cam is a cheapo HD Aiptek and it produces only footage that has that extra special Annoying Flicker feature. :)
