sorry if this is obvious, i am tryin figure the best and less costy method to achieve this :
i want to be able to fade movies to black when sending them into a compositing slab;
[jit.op @op * @val 0.] will (obviously) give a green background instead of black in uyvy mode, even after reconversion to rgba.
if i understand well how the operation shaders work they need two textures ; a "@val" attribute or "param val" does not really exist , which means in order to fade a movie to black i need to multiply it with a second texture being a black matrix , which i d like to avoid .
i am aware of Vade's fader shader , which does the job perfectly , i am just curious about an internal solution .
am i missing something ?
example here :