Source code for moviepy.video.fx.blink
[docs]def blink(clip, duration_on, duration_off):
"""
Makes the clip blink. At each blink it will be displayed ``duration_on``
seconds and disappear ``duration_off`` seconds. Will only work in
composite clips.
"""
new_clip = clip.copy()
if new_clip.mask is None:
new_clip = new_clip.with_mask()
duration = duration_on + duration_off
new_clip.mask = new_clip.mask.transform(
lambda get_frame, t: get_frame(t) * ((t % duration) < duration_on)
)
return new_clip