video.py 文件源码

def jump(self, frame=None, ms=None):
        assert frame is not ms, "Use either frame or ms, not both!"
        if frame:
            if frame >= self.frames:
                raise ReadFrameException('Cannot jump to frame (frame does not exists)')
            self.vid.set(cv2.CAP_PROP_POS_FRAMES, frame)
        if ms:
            self.vid.set(cv2.CAP_PROP_POS_MSEC, ms)
        # print("jumped to frame %i" % self.vid.get(cv2.CAP_PROP_POS_FRAMES))