Video4Linux是Linux下用于获取视频和音频数据的API接口，在这篇文章中，着重阐述如何利用Video4Linux获取摄像头数据，以实现连续影像的播放。 -Video4Linux is Linux used for access to video and audio data of the API interface, In this article, focuses on how to use Video4Linux access to camera data, in order to achieve continuous video playback.