Wired

[Alexander Gao]

it’s a result of bad lighting. the worse your lighting is, the more grainy your footage will look. this is what happens when your aperture is too large, and your shutter speed is too large, just as any photographer will tell you.

Alexander Gao

“When the revolution happens, I’ll be leading it.”

[Alexander Gao]

i meant when your shutter speed is too short

Alexander Gao

“When the revolution happens, I’ll be leading it.”

[Bret Williams]

In what way would shutter speed and aperture have anything to do with grain? Or “weird” little dots.

If you have low lighting and have to push the film, that’s going to give you grain. If you have low light and have to crank the gain in camera, or crank the vid level in post, that will give you grain. But aperture and shutter speed? Unrelated imho.

A wide aperture will give you more exposure and lose depth of field an sharpness. A fast shutter speed will give you less exposure time, but a sharper image with less motion blur.

[Justin Ferar]

What we should be talking about here is “gain” and “noise”.

The footage was shot on high gain thus has video noise (mosquitos, artifacting, whatever you choose to call it).

The only suggestion I have is a “remove noise” filter but you will lose some details.

“Too much too soon” has a remove noise filter.

Good luck.

[Alexander Gao]

exactly. if you have a faster shutter speed, there is less time for light to register on the chips or on the film, thus the camera will not produce as pristine of an image, and grain will result from a smaller of number of light rays “burning”. I think you need to touch up on your knowledge of shutter and aperture a bit.

Alexander Gao

“When the revolution happens, I’ll be leading it.”

[Justin Ferar]

My point is that I it’s misleading to refer to “grain” when discussing video unless trying to add it in post.

BTW I think your getting me confused with the other member who responded to your first post!

[John Davidson]

I don’t know what camera you’re shooting with, but I only get grain when I boost the gain. I just shot a ton of Z1U footage in Oahu and spend hours playing with shutter speeds in the sun and at night/dusk. As long as my gain was set on zero, there was no grain – day or night. The lower the shutter speed, the greater amount of motion blur you have. With the shutter speed set to 4, the video was much brighter, obviously because the frame of video received 1/4 second to process the light.

At any rate, it’s possible that his question relates in some way to Final Cut Pro since we’re in that forum, in which case, it could he’s referring to the “marching ants” one sees when one presses control-z. Because you shot this in low light, it’s very likely you did crank the gain up considerably, thereby making normally lit elements very bright. If that is the case, when you hit control-z, you’ll see lines around objects and it will freak you out.

Hit control-z again and you’ll shut the zebra line feature off.

Neo