DV / HDCAM Keying

@nthony · **DV / HDCAM Keying -** November 18th, 2009, 03:13 PM

Does anyone have any tips for keying DV / HDCAM footage with Flame? With Nuke / Shake I convert the colour space of the footage to YCbCr (YUV), blur the red and blue channels, minimising the compression artefacts. After the blur operator, I convert back to RGB, then key.

I've had a quick look on Flame, but only found the Mono operator, this does break out the channels, but Ideally I would also like to convert the colour space before blurring the individual channels.

As Flame works in RGB is the above technique possible, without starting a Flame project in YCbC?

Any tips would be most kind,

@nthony

aitorarroyo · December 8th, 2009, 03:11 PM

The problem is not the Shake, Nuke or Flame. It´s the artifacts. You can use Furnace F_Denoise. Separete the channels RGB and use this filter. Combine the channel and try to do the Key.
Good luck!

Gentle Fury · December 8th, 2009, 03:20 PM

its actually a lot more than just noise. Most DV cameras apply a sharpen filter to the image which introduces dark edges...and of course 4:1:1 stairstepping....all in all video is not meant for keying and it is horrible to work with.

@nthony · December 9th, 2009, 04:38 AM

Quote:

Originally Posted by aitorarroyo

The problem is not the Shake, Nuke or Flame. It´s the artifacts. You can use Furnace F_Denoise. Separete the channels RGB and use this filter. Combine the channel and try to do the Key.
Good luck!

Thank you, I'll give that spark a try.

@nthony · December 9th, 2009, 04:41 AM

Quote:

Originally Posted by Gentle Fury

its actually a lot more than just noise. Most DV cameras apply a sharpen filter to the image which introduces dark edges...and of course 4:1:1 stairstepping....all in all video is not meant for keying and it is horrible to work with.

Too true... dv for keying is a pain in the proverbial butt.

pgill · January 7th, 2010, 08:40 AM

The modular keyer has a switch where you can key in yuv in the 3d keyer.

@nthony · January 13th, 2010, 02:32 AM

Quote:

Originally Posted by pgill

The modular keyer has a switch where you can key in yuv in the 3d keyer.

Thank you very much for the tip, could you let me know where I could find the switch?

pgill · 02:42 AM

If you go into the MK and then key3d, two thirds from the right. There is a softness/noise category in there is a colour button defaulting to rgb, tap on the rgb it toggles to yuv.

Could you let us know how well it keys, I may have to do some keying on canon 7d footage, urrgh!

peter nemec · January 13th, 2010, 05:28 AM

Hi ther, so in flame the best for this type od keying is modular keyer, or I have good experience with master keyer. It is a best keyer for rgb or yuv, you have to play with it, little bit, but in end you will have best result.

if you want, contact me, www.peternemec.com. And I show you how. bye