Having a strange prob

[martijn15]

Hello people,
I have a strange problem with OBS studio.
i am wotking in the after school business and we want to make a movie witih a green screen and OBS.
I set everything up with green screen , lights and camera (logitech c922 pro stream ) and followed a youtube tutorial to make a the settings right.
If i use the chorma key filter and do it like this (picture 1 till 4 )
sadly i then get a picture like the last one , the picture looks like a ghost or the kid in front of the screen looks seethru....
How do i solve this ?
When i look a tutorials on youtube and there the chroma key is set,the green screen directly changes in black screen
(https://www.youtube.com/watch?v=ZW_9FwBArDw)
this does not happen when i setup... very frustrating

PLease help us

Thanks

 

[R1CH]

While your lighting is good, the color of the green screen or the camera settings seems way off. It's more blue than green. Try and reduce the blue cast so you get a real bright vibrant green and it will work better.

 

[konsolenritter]

Green-Screen-Technique is very sensitive to right luminance, colors and contrast.

In the "Video instellen" strongly disable any automatic white balancing. (The camera "sees" to much green for now and does bias against that much green. But instead you need to get that much green.) So disable AWB and pitch the white balance by hand as long (or until) the kids faces look anything acceptable near "neutral skin color" in your eyes.

Afterwards twist the greenscreen settings until the tradeoff between stable (enough) foreground and (possibly best) keyed out background fits your needs.

And, of course: The kids should avoid greenish colors in their shirts. Otherwise you have to switch the whole thing to blue-screen. ;-P

 

[martijn15]

Thanks both, i am going to try it out...

While your lighting is good, the color of the green screen or the camera settings seems way off. It's more blue than green. Try and reduce the blue cast so you get a real bright vibrant green and it will work better.

How do i reduce the blue cast ?
not so good at obs yet...

thanks

 

[martijn15]

Green-Screen-Technique is very sensitive to right luminance, colors and contrast.

In the "Video instellen" strongly disable any automatic white balancing. (The camera "sees" to much green for now and does bias against that much green. But instead you need to get that much green.) So disable AWB and pitch the white balance by hand as long (or until) the kids faces look anything acceptable near "neutral skin color" in your eyes.

Afterwards twist the greenscreen settings until the tradeoff between stable (enough) foreground and (possibly best) keyed out background fits your needs.

And, of course: The kids should avoid greenish colors in their shirts. Otherwise you have to switch the whole thing to blue-screen. ;-P

Where can i do this in OBS? setting the AWB?
thanks

 

[koala]

White balance is something the camera has to do. You seem to use a Logitech c922, so try the information Google will find for this:

Google Search

www.google.com

 

[AaronD]

If it's a cheap camera, then it might have Auto White Balance permanently on, *in the camera*, and you can't disable that. In that case, you're screwed. Get a different camera that can accept manual settings, *in the camera*. Then set the white balance *in the camera* to manual, and tell it the type of light that you're using. (incandescent, tungsten, sunlight, sunlight with clouds, etc.)

Another option is to get a card that is pure white or perfectly gray, hold it in front of the camera with all of your lighting exactly as it's going to be, and tell it that "this is white" or "this is gray". Not all cameras can do that, and certainly not the cheap ones!

In any case, you absolutely do not want Auto White Balance! In trying to make the overall scene somewhat white on average, it completely screws up the vast sea of green that you really do want to be green. And again, THE CAMERA is probably the culprit here, not OBS.

 

[konsolenritter]

Where can i do this in OBS? setting the AWB?
thanks

As said, look into the "Video instellen" button in your cam's source. A dialog should pop up showing what you may change parameters on that camera. Can't say how that dialog will look like, but have an eye for something like a checkbox "auto" or a slider for something named like "whitebalance" or "color".