视频采集是开发视频监控系统的首要步骤，它关系到采集视频数据的质量，因此，视频采集会影响到其后的各种操作（包括视频预览、视频录像、视频回放、图像识别等）-Video capture is the development of video surveillance system the first step, it is related to the quality of data capture video, so the video capture will affect the subsequ