(No such device),这通常表明指定的设备不存在或无法访问。以下是对该问题的详细分析和解决步骤: 1. vidioc_dqbuf 函数的作用和上下文 vidioc_dqbuf 是V4L2 API的一部分,用于视频捕获。它允许应用程序从驱动程序的缓冲区队列中检索一个已捕获数据的缓冲区。这是视频捕获过程中的一个关键步骤,通常在启动视频捕获后,...
V4L2英文全称是Video for Linux2，它是专门为视频设备设计的内核驱动。在做视频的开发中，一般我们操控...
what(): VIDIOC_DQBUF error 19, No such device [camera/camera_nodelet_manager-1] process has died [pid 2318, exit code -6, cmd /opt/ros/kinetic/lib/nodelet/nodelet manager __name:=camera_nodelet_manager __log:=/home/mateusz/.ros/log/d9cc3536-d7f1-11e6-b223-243c200a98cb/came...
./cpp-pointcloud terminate called after throwing an instance of 'std::runtime_error' what(): VIDIOC_DQBUF error 19, No such device Aborted (core dumped) ./cpp-tutorial-2-streams There are 1 connected RealSense devices. Using device 0, an Intel RealSense SR300 Serial number: 614205002887 Fi...
[video4linux2,v4l2 @ 0xd2d270] ioctl(VIDIOC_DQBUF): No such device /dev/video2: No such device frame= 0 fps=0.0 q=-1.0 Lsize=N/A time=00:00:00.00 bitrate=N/A speed= 0x video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown ...
what(): VIDIOC_DQBUF error 19, No such device [camera/camera_nodelet_manager-1] process has died [pid 2318, exit code -6, cmd /opt/ros/kinetic/lib/nodelet/nodelet manager __name:=camera_nodelet_manager __log:=/home/mateusz/.ros/log/d9cc3536-d7f1-11e6-b223-243c200a98cb...
what(): VIDIOC_DQBUF error 19, No such device [camera/camera_nodelet_manager-1] process has died [pid 2318, exit code -6, cmd /opt/ros/kinetic/lib/nodelet/nodelet manager __name:=camera_nodelet_manager __log:=/home/mateusz/.ros/log/d9cc3536-d7f1-11e6-b223-243c200a98cb/came...