import numpy as np
from moviepy.decorators import requires_duration
[docs]@requires_duration
def fadeout(clip, duration, final_color=None):
"""
Makes the clip progressively fade to some color (black by default),
over ``duration`` seconds at the end of the clip. Can be used for
masks too, where the final color must be a number between 0 and 1.
For cross-fading (progressive appearance or disappearance of a clip
over another clip, see ``composition.crossfade``
"""
if final_color is None:
final_color = 0 if clip.ismask else [0,0,0]
final_color = np.array(final_color)
def fl(gf, t):
if (clip.duration-t)>=duration:
return gf(t)
else:
fading = 1.0 * (clip.duration - t) / duration
return fading*gf(t) + (1-fading)*final_color
return clip.fl(fl)