managers.py 文件源码

def _writevideoframe(self):
        if not self.is_writingvideo:
            return
        if self._videoWriter is None:
            fps = self._capture.get(cv2.CAP_PROP_FPS)
            if fps == 0.0:
                # FPS???????
                if self._frameElapsed < 20:
                    # wait until more frame elapse so that the estimate is more stable.
                    return
                else:
                    fps = self._fpsEstimate
                    # print fps
            size = (int(self._capture.get(cv2.CAP_PROP_FRAME_WIDTH)), int(self._capture.get(cv2.CAP_PROP_FRAME_HEIGHT)))
            self._videoWriter = cv2.VideoWriter(self._videoFilename, self._videoEncoding, fps, size)

        self._videoWriter.write(self._frame)