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https://www.kernel.org/doc/html/v4.10/media/intro.html
http://www.tldp.org/HOWTO/Webcam-HOWTO/index.html
V4L2编程
https://baike.baidu.com/item/V4L2
V4L2 soc camera 分析 - 系统架构图
嵌入式Linux下Camera编程--V4L2
Linux之V4L2基础编程
https://unix.stackexchange.com/questions/5452/manipulating-dev-video
ioctl VIDIOC_QBUF,DQBUF和驱动交换一个buffer
基于V4L2摄像头采集图片程序设计
用V4L2采集图像经常卡死在VIDIOC_DQBUF
v4l2API无法执行VIDIOC_DQBUF的问题
linux下V4L2编程,ioctl VIDIOC_DQBUF时,为什么总是返回-1呢?如何解决?
V4L2 ,VIDIOC_DQBUF,Invalid argument
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