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 ``transfx.crossfadeout``
"""
if final_color is None:
final_color = 0 if clip.is_mask else [0, 0, 0]
final_color = np.array(final_color)
def filter(get_frame, t):
if (clip.duration - t) >= duration:
return get_frame(t)
else:
fading = 1.0 * (clip.duration - t) / duration
return fading * get_frame(t) + (1 - fading) * final_color
return clip.transform(filter)