sound.py 文件源码

def extract_sound(self, start=0, end=None):
        if not start and not end:
            raise ValueError
        start_pos = self.to_index(start)
        if end:
            end_pos = self.to_index(end)
        else:
            end_pos = len(self.raw)

        _buffer = io.BytesIO()
        _output = wave.open(_buffer, "wb")
        _output.setnchannels(self.channels)
        _output.setsampwidth(self.samplewidth)
        _output.setframerate(self.framerate)
        raw = self.raw[start_pos:end_pos]
        _output.writeframes(self.raw[start_pos:end_pos])
        _output.close()
        _buffer.seek(0)
        return Sound(_buffer)