问题描述
我在寻找一个简单例如使用V4L2在Linux下访问摄像机。
在哪里可以找到它?由于操作简单,越好。
I'm looking for a simple example for camera access in Linux using V4L2.Where I can find it? As simple, as possible.
谢谢,
推荐答案
在这里尝试uvccapture code - >的
这是非常小但非常混凝土的例子,这使得所有使用V4L2概念(打开,设置格式,分配内存,请求缓冲区,Dqbuffer和查询缓冲区 - ioclts所有intems)。
Try the uvccapture code here -> http://staticwave.ca/source/uvccapture/It is very small yet very concrete example which makes use of all the V4l2 concepts (open,set format, allocate memory, Request Buffer, Dqbuffer and Query-buffer - all intems of ioclts).
uvcgrab ()函数是一个寻找它利用Dqbuffer和查询的缓冲区。
uvcgrab() function is the one to look for which makes use of Dqbuffer and Query-buffer.
ioctl (vd->fd, VIDIOC_DQBUF, &vd->buf);
ioctl (vd->fd, VIDIOC_QBUF, &vd->buf)
在研究它,你可以继续寻找这个这将缓解您的理解定义的ioctl
While Studying it you can keep looking for the ioctl definition in this link which will ease your understanding.
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