from moviepy.decorators import apply_to_audio, apply_to_mask
[docs]def speedx(clip, factor = None, final_duration=None):
"""
Returns a clip playing the current clip but at a speed multiplied
by ``factor``. Instead of factor one can indicate the desired
``final_duration`` of the clip, and the factor will be automatically
computed.
The same effect is applied to the clip's audio and mask if any.
"""
if final_duration:
factor = 1.0* clip.duration / final_duration
newclip = clip.fl_time(lambda t: factor * t, apply_to=['mask', 'audio'])
if clip.duration is not None:
newclip = newclip.set_duration(1.0 * clip.duration / factor)
return newclip