Well, going further down my virtual studio path…
I have a Blackmagic Design Ultimatte 12 (although now I find out that the Ultimatte 11 is as good and very cheap here in the USA- less than $3,000!).
I need to create a virtual studio, and I was planning on bringing in SDI live video (people on green screen) into Unreal- do green screen removal and comp work using composure.
It works, but only OK…
Ultimatte 12 (11):
It does incredible work in terms of compositing- extremely good green screen removal, and a ton of ways to integrate your foreground, background, etc. to make it all very realistic- much better, I feel, than the ability of Unreal, mainly in the area of the removal and ‘fixing’ of the green screen process. I always feel that the green screen work inside of Unreal results in edges, etc. that make the image look a bit ‘pasted on’, (no matter how hard you try for realism).
It seems that the ‘big boys’ are doing something like this, using the Ultimatte, I assume, for all the same reasons.
You have basically, two ways of approaching this, as far as I can tell:
a) Feed Ultimatte into Unreal, have Unreal do the comp work, not the green screen removal- use Ultimatte for that. Problem is, now that I dig deeper:
Ultimatte outputs two required SDI signals: one is the key (your live scene) and the other is the matte. So, you need to input two SDI streams into Unreal, and have Unreal combine them (key+matte) so you end up with the transparent background (hence, the required matte output). The key output has no alpha channel, so the background is black- you need the combo of the key and matte.
I guess, inside Unreal, you create two media profiles to accept 2 SDI channels (don’t know how to do this), and then somehow combine them inside of Unreal…don’t know how to do this either.
Above comments are the way I’d like to do it- help…!
The other way, which gets you some more functionality, is use Ultimatte as intended- Take your scene in Unreal and output it over SDI to the Ultimatte background input. Live video (camera) into Ultimatte- and, it does all the comp work.
Not as flexible as doing it all in Unreal (??). And, apparently, the ‘big boys’ do it inside unreal (Ultimatte into Unreal).
I do see you can create a media output (Unreal to SDI) and you can configure the output to be the key, or key+matte.
Anybody have ideas or knowledge as to how to accomplish this?