Breezeelee: 临时关闭selinux，setenforce 0 试试

暴躁小萌: catkin_make恢复生成所有软件包的命令有点问题，等号左右不能有空格，用这个： catkin_make -DCATKIN_WHITELIST_PACKAGES=“”

喵了个咪的803: halcon可以直接连接机械手吗

weixin_64100055: 出现这个错误 /home/tju530/catkin ws/src/usb_cam-develop/src/usb_cam.cpp: In member functionvoid usb cam::UsbCam::mjpeg2rgb(char*,int,char*,int)':/home/tju530/catkin ws/src/usb cam-develop/src/usb_cam.cpp:503:61: error;"avcodec send packet’was not declared in this scopedecoded_len = avcodec_send packet(avcodec_context_，&avpkt);avcod /home/tju530/catkin ws/src/usb_cam-develop/src/usb cam.cpp:518:75: error:ec receive frane was not declared in this scopeint error code = avcodec receive frame(avcodec context, avframe camera ); bunti monline 7 dg8 0 1o aotget usb cam-develop/CHakeFiles/usb cam.dir/build.make:65: recipe for target "usb cam-develop/CHakeFiles/usb cam.dir/src/usb cam.cpp.o' failedmake[2]: ##* Tusb can-develop/CHakeFiles/usb cam.dir/src/usb cam.cpp.o] Error 1CHakeFiles/Makefile2:418: recipe for target 'usb cam-develop/CHakeFiles/usb candir/all'failedmake[1]: es [usb cam-develop/CHakeFiles/usb cam.dir/all] Error 2Makefile:143: recipe for target 'all' failedata[all] Error 2

午夜萧峰: 感谢大佬指点，解决了，大佬新年快乐