make key mask frame ?

[luoww1992]

how to make the first key frame with mask ?
it is different to other 24bit color image.
I try to make it, but the result is bad.

[z-x-yang]

Refer to this issue.

A mask file is an 8-bit greyscale image. Set the mask value to be 1 for the first object region, to be 2 for the second, and so on.

The colour of each object is from a colour palette inside the mask file. The palette is not necessary for training or inference but is used for clearer visualization of different objects.