A simple alternative to MaskTools2's mt_lutspa.
VapourSynth-Draw is a filter that behaves almost the same as mt_lutspa: Accept an expression input and take the pixel's coordinate into the calculation.
8~16 bit integer YUV or GRAY clip.
draw.Draw(clip, expr[])
- clip: 8~16 bit integer YUV or GRAY clip.
- expr: expressions. Multiple expressions can be given to individual planes of a clip. The
following operators can be used in the expressions:
- +, -, *, /, %, abs, pow, max, min
- >, <, >=, <=, =, not, and, or
- ?
- numbers: any integer/float point numbers without exponent
from vapoursynth import core
src = xxx # an 1080p YUV420P8 clip...
# Draw a white circle at the middle of a 8bit 1080p clip with radius of 100
circle = core.draw.Draw(src, 'x 960 - 2 pow y 540 - 2 pow + 100 2 pow < 255 0 ?')
# Draw a white rectangular on Y plane and set UV to 128
rect = core.draw.Draw(src, ['x 960 - abs 100 < y 540 - abs 50 < and 255 0 ?', '128'])
# Draw a white grid with block size of 25
grid = core.draw.Draw(src, 'x 25 % 0 = y 25 % 0 = or 255 0 ?')- note: due to the use of the lookup table, it will take some time to initialize. But after that it will affect little on processing speed.