Thanks for this script!
Its sooo complicated to make a simple mask (even which option to select e.g. multiply, atop…),
the script helps but its still freaks me out and I guess its an important deal breaker for most newcomers.
Wondering why there is no simple function to add a mask ?
BTW.
After adding a mask (which occurs as expected) I added a ChromaKey and suddenly lost the masks alpha channel… what am I doing wrong?
fig.1: added roto for masking, result as expected.
fig.2: added a chroma key, the alpha information from the roto is somehow lost.

