采用v4l2 进行USB摄像头数据采集，并且，能够通过QT界面来进行图像数据的显示-Using v4l2USB camera data acquisition, and, through QT interface to the display image data,,,

linux 下C语言运用V4L2开发的USB摄像头获取数据并生成JPG图片的程序，-V4L2 linux using C language development of USB camera to obtain data and generate JPG pictures of the procedure,