I feel confused about alpha channel and the way jit.alphablend works.
I tried to make a patch to see if the value of alpha channel really affects the video, but it does not seem to change anything.
My way of doing it is to multiply alpha channel value with jit.op. I found that ｗhatever the multiplier value is, the resulted video is the same. Does this mean that changing the alpha channel value does not affect the resulted video ?
Could anyone explain it ? Thanks.
The following is the testing patch I made: