MusicVideo.py 文件源码

def compose(self) -> VideoClip:
        """
        Composes the music video into a VideoClip
        """
        segments = [segment.crop_scale(self.dimensions) for segment in self.segments]
        segments = [segment.apply_effects() for segment in segments]

        # Add buffers for crossfaded video segments
        buffered_video_segments = []
        for index, segment in enumerate(segments):
            buffered_video_segments.append(segment)

            if index == len(segments) - 1:
                continue

            next_segment = segments[index + 1]

            for effect in next_segment.effects:
                if isinstance(effect, v_effects.CrossFade):
                    buffer = segment.trailing_buffer(effect.duration)
                    if buffer.audio:
                        buffer = buffer.set_audio(buffer.audio.audio_fadeout(effect.duration))
                    buffered_video_segments.append(buffer)

        segments = buffered_video_segments

        # Build composite video
        composite_video_segments = [segments[0]]
        for index, segment in enumerate(segments[1:]):
            # Start current segment where previous segment ends in composite video
            previous_segment = composite_video_segments[index]
            segment = segment.set_start(previous_segment.end)

            # Apply any crossfade for the current segment
            for effect in segment.effects:
                if isinstance(effect, v_effects.CrossFade):
                    segment = segment.set_start(previous_segment.end - effect.duration)
                    segment = segment.crossfadein(effect.duration)
                    if segment.audio:
                        segment = segment.set_audio(segment.audio.audio_fadein(effect.duration))

            composite_video_segments.append(segment)

        music_video = CompositeVideoClip(composite_video_segments)

        if self.audio_file:
            music_video.audio = AudioFileClip(self.audio_file)

        return music_video