v4l2_ctrl_handler_free(&foo->ctrl_handler);returnerr;} v4l2_ctrl_new_std函数返回指向新的控制v4l2_ctrl指针,但是如果你不需在control ops外访问这个指针,那么就没有必要存储。 v4l2_ctrl_new_std功能将在大多数领域基于control ID,除了min,max,步骤和默认值。这些在过去四个参数中传递。这些值是特定于驱动...
IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO ...
– 列出所有可用的控制器:v4l2-ctrl -l – 获取控制器的当前值:v4l2-ctrl -C “control_name” – 设置控制器的值:v4l2-ctrl -c “control_name=value” 这些命令只是v4l2命令中的一部分,更多的命令和参数可以通过“man v4l2-ctl”、“man v4l2-sysfs”、“man v4l2-ctrl”命令来查看其详细的使用说明。通过...
(Not Supported) Control ioctls: test VIDIOC_QUERY_EXT_CTRL/QUERYMENU: OK (Not Supported) test VIDIOC_QUERYCTRL: OK (Not Supported) test VIDIOC_G/S_CTRL: OK (Not Supported) test VIDIOC_G/S/TRY_EXT_CTRLS: OK (Not Supported) test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK (Not...
(Not Supported) Control ioctls: test VIDIOC_QUERY_EXT_CTRL/QUERYMENU: OK (Not Supported) test VIDIOC_QUERYCTRL: OK (Not Supported) test VIDIOC_G/S_CTRL: OK (Not Supported) test VIDIOC_G/S/TRY_EXT_CTRLS: OK (Not Supported) test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK (Not...
struct v4l2_control control;//具体控制的值 1. 2. 3. 4. 5. 6. 7. 下面具体说明开发流程(网上找的) 打开视频设备 在V4L2中,视频设备被看做一个文件。使用open函数打开这个设备: AI检测代码解析 //用非阻塞模式打开摄像头设备 intcameraFd;
#define VIDIOC_S_CTRL _IOWR('V', 28, struct v4l2_control) /*设置控制*/ --- 1.2重要结构 头文件include/linux/videodev2.h include/media/v4l2-dev.h V4L2驱动核心实现文件:driver/media/video/v4l2-dev.c v4l2-dev.h中定义的video_device是V4L2驱动程序的核心...
defineVIDIOC_ENUMINPUT _IOWR('V', 26, struct v4l2_input)#defineVIDIOC_G_CTRL _IOWR('V', 27, struct v4l2_control)#defineVIDIOC_S_CTRL _IOWR('V', 28, struct v4l2_control)#defineVIDIOC_G_TUNER _IOWR('V', 29, struct v4l2_tuner)#defineVIDIOC_S_TUNER _IOW('V', 30, struct v4l2_...
//ctrl 数组中的 control ,即 v4l2_ext_control 的个数 struct v4l2_ext_control * controls //control 数组, v4l2_ext_control 包含要设定的 ID ,以及 value 应用程序可以使用 V4L2_CTRL_FLAG_NEXT_CTRL 来对扩展 control 进行枚举, V4L2_CTRL_FLAG_NEXT_CTRL 返回下一个 ID 更高的 control ID : ...
omxh265enc num-slices=8 periodicity-idr=240 cpb-size=500gdr-mode=horizontal initial-delay=250 control-rate=low-latencyprefetch-buffer=true target-bitrate=25000 gop-mode=low-delay-p ! video/x-h265,alignment=nal ! rtph265pay ! udpsink buffer-size=60000000 host=192.168.25.89port=5004 async=fa...