Sluggo wrote: I'd watch that once.

Tooooo kind, I wouldn't speak so loudly, someone might FORCE you to actually do it. heh heh heeeh.... *cough* hehehe BWAHHHHHAHAHHA Force you; get it?!

The final product should compress nicely.

ThrowgnCpr wrote: i would give this a watch too. It would be nice so that you could tweek it a bit so that only new additions show up. There are obvious slight color differences or minor shifts in the frame that will show up, but these really aren't changes. You can see this on your preview of R2D2 - all the lines around him. It would be nice if only the new boulders and shadow showed up in the print. just a thought.

All thoughts welcomed. New Additions Identification depends on the two sources used. Which could mean looking at looong stretches of blank black screen. (especially as i'm leaning toward HD and BR) Tweaking will happen, how it's applied is the 'art'. Which i'm not always the best judge of. Have a bunch of other screen caps to test with. For instance with the Ewok how do you pronounce the brown eyes out of the sea of black?

There's also a 'subtraction' blending mode. The results lean to more blacks. Here's a wikipedia explanation of the two:

Subtract
This blend mode simply subtracts pixel values of one layer with the other. In case of negative values, black is displayed.

Difference
Difference subtracts the top layer from the bottom layer or the other way round, to always get a positive value. Blending with black produces no change, as values for all colours are 0. (The RGB value for black is 0,0,0). Blending with white inverts the picture.

Trying a bit with the 2004s and a laser disc capture and I think this will be more benefitial and more successful results using the HD Broadcasts and the Blu-Ray. As on a pixel by pixel count they will be more alike for the difference to produce a true black. The problem with these two sources is the HD broadcast might be the 16-236 (?) while the BR might be the full color range 0-255.

Also there's probably a different Difference which would leave white behind instead of black. The all black screen has it's appeal, but white might be easier to spot with.