URGENT ON SET

[Mohamed Younis]

Getting rolling shutter problems from regular light. I tried 24fps 23.98 and 25 fps timebase. I'm in Egypt so the power is 220v.
Anyone knows what I can do?

 

[kylebainter]

what do you mean "regular light"? Practical lights? I believe your shutter has to be 173 degree. based on the 50 hz cycle.

 

[Ramesh Jai]

If you mean 'flicker' from regular light then you could try playing around with shutter speed.. Thanks

 

[Mohamed Younis]

i tried a lot

 

[Pete Wallington]

You're in Egypt, so 220-240v and PAL land.
Try 25fps as your project setting, and 180 degree shutter.

Are you talking practical or tungsten lights? If you're using HMIs switch your ballasts to flicker-free.

Are you seeing the flicker on the footage when looking at it on computer? Ie you're sure it's in the footage and not an LCD or EVF issue?

 

[Paul Ellington]

i tried a lot

IF IT'S A REAL JAM, MEGA-PLAYGROUND IN NYC WAS ABLE TO FIX A PROBLEM LIKE THIS IN POST.... PRICEY BUT IT CAN BE DONE.

 

[Paul Ellington]

MEGA-PLAYGROUND.COM ASK FOR ASK FOR MARK DOYLE TELL HIM I SENT YOU AND HE WILL HOOK YOU UP.

 

[Michael Kromschroeder]

Mohamed, you should be fine with 25 fps and 1/50 (180°)

 

[Vico Martin]

Pete and Michael it´s right, 25 fps 1/50 it´s the right point to avoid flicker problems in any 50Hzs land.

 

[Andrew clemson]

Im totally lost here. What do you classify as "regular light"? daylight? Tungsten?

Neither should flicker at a base framerate of 25FPS

 

[ericyoung]

In 50Hz mains Egypt, if you're shooting at higher varispeeds than 25fps then only shoot speeds which are multiples of 25 at 180 degree shutter. If you aren't then you will have to try altering your shutter angle/speed/phase to minimise flicker or banding in footage.

Also, if you are shooting say above approximately 75 fps, then small tungsten fixtures (less than say 1kW) may fiicker due to low thermal inertia of small tungsten filaments which brighten and dim with the alternating AC current - larger lamps with bigger filaments don't dim as much when the mains current alternates through zero.

 

[Mohamed Younis]

I got some good shots thanks to your advice. Will post some later on shot on red.
Again thanks