yolov4-tiny colab notebook stop training model after T4 upgrade

[aabilityuk]

Hello dear community! I am trying to use YOLOv4-tiny colab notebook (YOLOv4-tiny) for training the model, but i have got some errors on that stage:

#install environment from the Makefile

%cd /content/darknet/

# compute_37, sm_37 for Tesla K80

# compute_75, sm_75 for Tesla T4

# !sed -i 's/ARCH= -gencode arch=compute_60,code=sm_60/ARCH= -gencode arch=compute_75,code=sm_75/g' Makefile




#install environment from the Makefile

#note if you are on Colab Pro this works on a P100 GPU

#if you are on Colab free, you may need to change the Makefile for the K80 GPU

#this goes for any GPU, you need to change the Makefile to inform darknet which GPU you are running on.

!sed -i 's/OPENCV=0/OPENCV=1/g' Makefile

!sed -i 's/GPU=0/GPU=1/g' Makefile

!sed -i 's/CUDNN=0/CUDNN=1/g' Makefile

!sed -i "s/ARCH= -gencode arch=compute_60,code=sm_60/ARCH= ${ARCH_VALUE}/g" Makefile

!make

Here is errors:

/content/darknet chmod +x *.sh g++ -std=c++11 -std=c++11 -Iinclude/ -I3rdparty/stb/include -DOPENCV pkg-config --cflags opencv4 2> /dev/null || pkg-config --cflags opencv -DGPU -I/usr/local/cuda/include/ -DCUDNN -Wall -Wfatal-errors -Wno-unused-result -Wno-unknown-pragmas -fPIC -Ofast -DOPENCV -DGPU -DCUDNN -I/usr/local/cudnn/include -c ./src/image_opencv.cpp -o obj/image_opencv.o Package opencv was not found in the pkg-config search path. Perhaps you should add the directory containing `opencv.pc' to the PKG_CONFIG_PATH environment variable Package 'opencv', required by 'virtual:world', not found ./src/image_opencv.cpp:16:10: fatal error: opencv2/core/version.hpp: No such file or directory 16 | #include <opencv2/core/version.hpp> | ^~~~~~~~~~~~~~~~~~~~~~~~~~ compilation terminated. make: *** [Makefile:165: obj/image_opencv.o] Error 1

My project is on windows (YOLO darknet). Help me please to find a solution.

P.S.

A couple years ago YOLOv4-tiny colab notebook worked very good with no errors. My guess it stop training the model after upgrade from K80 GPU to T4. thank you very much!

[stephanecharette]

Note this repo is no longer maintained. You may want to see this repo instead: https://github.com/hank-ai/darknet#table-of-contents

The colab example notebooks in that repo were last updated in August 2025: https://github.com/hank-ai/darknet/tree/master/colab

[aabilityuk]

Note this repo is no longer maintained. You may want to see this repo instead: https://github.com/hank-ai/darknet#table-of-contents

The colab example notebooks in that repo were last updated in August 2025: https://github.com/hank-ai/darknet/tree/master/colab

Thank you very much for a quick reply!!! I really appreciate it! I will check the new repo.

[aabilityuk]

Dear guru @stephanecharette , i opened up a question in new repo you suggested, could you please take a look and help me a little bit, i am very new to yolo/darknet. Here is a link to my question: hank-ai/darknet#145

Thank you so much