897664ccc5
Skip modifier, when using strip as a mask that ends before specified timeline frame. To make behavior of missing mask more consistent, modifier is also skipped, when strip produces blank output due to missing data. Skipping modifier due strip boundary only works, when "Mask Time" is set to Relative mode. This is because absolute mode ignores strip offsets. Pull Request: https://projects.blender.org/blender/blender/pulls/121498