视频捕捉，用一个抓图应用程序进行测试，进入/test 目录，敲入./vgrabbj -f /tmp/1.jpg。应该会在/tmp 目录下生成一张摄像头拍摄的图片了。-video capture with a screen in application testing, access/test directory, Knock./vgrabbj-f/tmp/1.jpg. Should the/tmp directory generated a camera shooting pictures