V4L2较V4L有较大的改动，并已成为2.6的标准接口，函盖video\dvb\FM...，多数驱动都在向V4l2迁移。更好地了解V4L2先从应用入手，然后再深入到内核中结合物理设备／接口的规范实现相应的驱动。本文先就V4L2在视频捕捉或camera方面的应用框架。-The V4L2 larger changes than the V4L 2.6 standard interface, and has become, covers the video \ dvb \ the FM ..., the majority of drivers are in the migration to V4l2. A better understanding The V4L2 start with the application to start, and then deep into the kernel, combined with the physical device/interface specification to achieve the appropriate driver. This article first V4L2 video capture or camera application fr a mework.