VIDEOIO(V4L2:/dev/video0): can't open camera by index 原因: 摄像头未连接或损坏 `ls -l /dev` 检查一下 权限不足 `sudo python xxx.py` 或 `sudo chmod 777 /dev/video0` 具体videox根据上一条指令查到的和你报错的内容修改 最重要的:网上其他地方查不到的解决方法,程序里面注意写 `cam.releas...
VIDEOIO ERROR: V4L2: Unable to capture video memory. VIDEOIO ERROR: V4L: can't open camera by index 0 开发环境:rk3399pro嵌入式开发板 原因: 其实就是开发板上有多个摄像头接口,而这些摄像头接口虽然没有接摄像头,但是还是占用了总线,所以简单说就是,你自己的摄像头的index并不是0,那究竟是多少呢?
VIDEOIO ERROR: V4L2: Unable to capture video memory. VIDEOIO ERROR: V4L: can't open camera by index 0 开发环境:rk3399pro嵌入式开发板 原因: 其实就是开发板上有多个摄像头接口,而这些摄像头接口虽然没有接摄像头,但是还是占用了总线,所以简单说就是,你自己的摄像头的index并不是0,那究竟是多少呢?
isOpened()) # VIDEOIO ERROR: V4L: can't open camera by index 0 # False # 如果有摄像头的话,那么此时就可以正常 捕获到摄像头视频 while(cap.isOpened()): ret,frame = cap.read() cv2.imshow("frame",frame) c = cv2.waitKey(1) if c == 27: break # 释放摄像头 cap.release() cv2....
错误2:can’t open camera by index [ WARN:0] global /io/opencv/modules/videoio/src/cap_v4l.cpp (887) open VIDEOIO(V4L2:/dev/video0): can't open camera by index 1. 解决: 将设备号改成-1可以打开笔记本自带摄像头,但不知道怎么打开usb摄像头 ...
3. can’t open camera by index X 这是说找到了摄像头设备,但是无法打开。请用sudo账户权限打开即可,或者给/dev/video0字符文件添加权限(具体权限添加情况依据自己的需求而定),如: chmod 777 /dev/video0 或者 chown 等 chmod +x 等 再次运行程序即可。
can't open camera by index Check user's groups (should be part of video group): $ ls -al /dev/video* $ id Modify if necessary: # usermod -aG <group> <user> (terminal restart is required, check with id again that groups are properly applied) Details: https://tldp.org/HOWTO/We...
cout << "can not open camera!" << endl; return -1; } Size size = Size( video_cap.get(CV_CAP_PROP_FRAME_WIDTH), video_cap.get(CV_CAP_PROP_FRAME_HEIGHT) ); //保存视频或者摄像头视频到本地需要使用VideoWriter VideoWriter video_writer; ...
[ WARN:0@4.385] global cap_v4l.cpp:982 open VIDEOIO(V4L2:/dev/video4): can't open camera by index [ERROR:0@4.501] global obsensor_uvc_stream_channel.cpp:156 getStreamChannelGroup Camera index out of range Traceback (most recent call last): File "train_seg.py", line 9, in <module...
# If they aren't opened correctly if not usb_cap.isOpened(): print("Cannot open usb camera") exit() # Set usb477 height and width usb_cap.set(cv2.CAP_PROP_FRAME_WIDTH, 1280) usb_cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 720) # Window ...