Demo needs OpenCV for webcam images.(opencv is installed and set opencv4=1)-CodePudding

I am trying to do object detection from a video file by using https://github.com/pjreddie/darknet. I've installed libopencv-dev for opencv. I've set opencv4=1 in Makefile.

And run this code. ./darknet detector demo cfg/coco.data cfg/yolo-tiny-obj.cfg yolov3.weights data/1.mp4 And got error Demo needs OpenCV for webcam images.

Could anyone help me? Thanks.

CodePudding user response：

Try to clean make file and recompile darknet

make clean
make

You can load OpenCV from git and install sources

git clone https://github.com/opencv/opencv
cd opencv
mkdir build
cd build
cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/usr/local .. 
make -j7
sudo make install

And after recompile the darknet with

make clean
make