import numpy as np
from moviepy.decorators import audio_video_fx, requires_duration
[docs]@audio_video_fx
@requires_duration
def audio_fadeout(clip, duration):
""" Return a sound clip where the sound fades out progressively
over ``duration`` seconds at the end of the clip. """
def fading(gf,t):
gft = gf(t)
if np.isscalar(t):
factor = min(1.0 * (clip.duration - t) / duration, 1)
factor = np.array([factor,factor])
else:
factor = np.minimum( 1.0 * (clip.duration - t) / duration, 1)
factor = np.vstack([factor,factor]).T
return factor * gft
return clip.fl(fading, keep_duration = True)