Keying Noisy footage

[freeflowform]

I have HD 10 bit 444 footage shot on blue screen that is very evenly lit but it is VERY noisy …
When I use the degrain feature and the patch feature in the master keyer it eats away at the key far to much …

Are there any good tips or tricks to get this to key better ?

Is furnace degrain the best solution (waiting to get this license)

Is the master keyer not the appropriate keyer for this challenge ?

thanks in advance

[Anonymous]

Master Keyer works amazingly well for properly shot green/blue screen.

I wouldn’t Denoise your clip prior to keying. I mean, try both ways, but, I’ve never felt it was beneficial. In the Keyer setup, are you using any KeyIn blur? setting that to 1 or 2 always helps.

There is a degrain in the Master Keyer that works quite well, although is quite slow to process.

You can always preprocess your matte out, and, depending on the clip’s motion vectors, selectively averaging the matte over a few frames will help.

And finally, you may be dealing with a more fundamental issue here when it comes to 4:4:4. From my experience, there are not a lot of telecine houses out there that have noise reducers for 4:4:4. If you can, see if a 4:2:2 transfer is any better.

Good luck.

randy

[Anonymous]

@jayrandall 31263 wrote:

I wouldn’t Denoise your clip prior to keying. I mean, try both ways, but, I’ve never felt it was beneficial. In the Keyer setup, are you using any KeyIn blur? setting that to 1 or 2 always helps.

I never knew about this feature. I will definitely try that.

@jayrandall 31263 wrote:

There is a degrain in the Master Keyer that works quite well, although is quite slow to process.

This is the one under where patch is correct? Do you use this after pulling the initial key ?
I found that when I sampled say the black area while using degrain, my key started to get chewed into ..

@jayrandall 31263 wrote:

You can always preprocess your matte out, and, depending on the clip’s motion vectors, selectively averaging the matte over a few frames will help.

I’m not sure what you mean by this … or maybe it’s just that I dont know how 🙂
can you explain further … thanks so much randy … sorry for all the questions

[Anonymous]

Get the best key you can. Process out the matte.

Average your matte over a few frames, or, timewarp it with mix set to 0.5 or 1 or try a few different ones. When the motion in your clip allows for it, blend/mix to the averaged/mixed matte. Depending on what your clip is, this won’t work. but, if it’s a guy standing in the frame with not a lot of movement, you can average your matte heavily, eliminate noise, and save the day.

The Degrain in the Master Keyer happens at the correct step in the process, but sometimes is a bit heavy handed.

Don’t shrink your matte too much, or erode it. If you have noisy edges, you may be able to use Sapphire Distort Fine to warp the edges of your fill. Pull your key, and use your matte as the Lens, and the Front as your front in the Sapphire Distort spark. Set it to Distort Fine, and then use the result of this as your new front. This may help eliminate some of the buzzy edges.

[pixelmonk]

Furnace DeNoise, with analysis on is your friend.

Paul

[Anonymous]

HUGE HELP !!!

thanks so much … the blur in helped tons

I owe you a beer

[shannones riders]

Hope you don’t mind if I ask this here, but it’s somewhat related to the topic.

I have to key well exposed RED footage. The client mentioned that some other facilities applied temporal noise reduction on RED stuff to get rid of compression noise and get a better key.

I watched some of the fxphd RED courses, but I can’t remember to anything like this.
I’ll try this with Furnace, but I think this only helps at footages with heavier compression like HDV.
What do you guys think?

Thanks,

pH.

[Ron Dohanetz]

Furnace has two related plug ins; Denoise and Degrain. As you’d imagine Denoise sorts out ‘electronic’ noise, and Degrain looks for film grain structure.

The results with Denoise on RED footage can be truly breathtaking. It has a temporal function, and could be what your client is alluding to.

[Author]

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