decorators.py 文件源码

def audio_video_fx(f, clip, *a, **k):
    """ Use an audio function on a video/audio clip

    This decorator tells that the function f (audioclip -> audioclip)
    can be also used on a video clip, at which case it returns a
    videoclip with unmodified video and modified audio.
    """

    if hasattr(clip, "audio"):
        newclip = clip.copy()
        if clip.audio is not None:
            newclip.audio =  f(clip.audio, *a, **k)
        return newclip
    else:
        return f(clip, *a, **k)