Window.cpp:1255: error: (-2:Unspecified error) The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Cocoa support

Python
,
1

Hello. I am getting this error when I am running my code. Everything works with my code. I started having this problem when I ran Yolov5 for my project. I am currently using Yolov8 for my project and everything worked fine.

Here’s my project (it should work fine on your PC):

import cv2
import pandas as pd
import numpy as np
from ultralytics import YOLO
from tracker import*
import time
from math import dist
model=YOLO('yolov8s.pt')



def RGB(event, x, y, flags, param):
    if event == cv2.EVENT_MOUSEMOVE :  
        colorsBGR = [x, y]
        print(colorsBGR)
        

cv2.namedWindow('RGB')
cv2.setMouseCallback('RGB', RGB)

cap=cv2.VideoCapture('C:/Input/Playlist_2022-09-13_0732.avi')

my_file = open("coco.txt", "r")
data = my_file.read()
class_list = data.split("\n") 
#print(class_list)

count=0

tracker=Tracker()

cy1=322
cy2=368

offset=6

vh_down={}
counter=[]


vh_up={}
counter1=[]

while True:    
    ret,frame = cap.read()
    if not ret:
        break
    count += 1
    if count % 3 != 0:
        continue
    frame=cv2.resize(frame,(1020,500))
   

    results=model.predict(frame)
#    print(results)
    a=results[0].boxes.data
    a_cpu = a.cpu()
    px=pd.DataFrame(a_cpu.data).astype("float")
#    print(px)
    list=[]
             
    for index,row in px.iterrows():
#        print(row)
 
        x1=int(row[0])
        y1=int(row[1])
        x2=int(row[2])
        y2=int(row[3])
        d=int(row[5])
        c=class_list[d]
        if 'car' in c:
            list.append([x1,y1,x2,y2])
    bbox_id=tracker.update(list)
    for bbox in bbox_id:
        x3,y3,x4,y4,id=bbox
        cx=int(x3+x4)//2
        cy=int(y3+y4)//2
        
        cv2.rectangle(frame,(x3,y3),(x4,y4),(0,255,255),1)
        


        if cy1<(cy+offset) and cy1 > (cy-offset):
           vh_down[id]=time.time()
        if id in vh_down:
          
           if cy2<(cy+offset) and cy2 > (cy-offset):
             elapsed_time=time.time() - vh_down[id]
             if counter.count(id)==0:
                counter.append(id)
                distance = 10 # meters
                a_speed_ms = distance / elapsed_time
                a_speed_kh = a_speed_ms * 3.6
                cv2.circle(frame,(cx,cy),4,(0,0,255),-1)
                cv2.putText(frame,str(id),(x3,y3),cv2.FONT_HERSHEY_COMPLEX,0.6,(255,255,255),1)
                cv2.putText(frame,str(int(a_speed_kh))+'Km/h',(x4,y4 ),cv2.FONT_HERSHEY_COMPLEX,0.8,(0,255,255),2)
                print (str(int(a_speed_kh)))

                
        #####going UP#####     
        if cy2<(cy+offset) and cy2 > (cy-offset):
           vh_up[id]=time.time()
        if id in vh_up:

           if cy1<(cy+offset) and cy1 > (cy-offset):
             elapsed1_time=time.time() - vh_up[id]

 


             if counter1.count(id)==0:
                counter1.append(id)      
                distance1 = 50 # meters
                a_speed_ms1 = distance1 / elapsed1_time
                a_speed_kh1 = a_speed_ms1 * 3.6
                cv2.circle(frame,(cx,cy),4,(0,0,255),-1)
                cv2.putText(frame,str(id),(x3,y3),cv2.FONT_HERSHEY_COMPLEX,0.6,(255,255,255),1)
                cv2.putText(frame,str(int(a_speed_kh1))+'Km/h',(x4,y4),cv2.FONT_HERSHEY_COMPLEX,0.8,(0,255,255),2)

           

    cv2.line(frame,(274,cy1),(814,cy1),(255,255,255),1)

    cv2.putText(frame,('L1'),(277,320),cv2.FONT_HERSHEY_COMPLEX,0.8,(0,255,255),2)


    cv2.line(frame,(177,cy2),(927,cy2),(255,255,255),1)
 
    cv2.putText(frame,('L2'),(182,367),cv2.FONT_HERSHEY_COMPLEX,0.8,(0,255,255),2)
    d=(len(counter))
    u=(len(counter1))
    cv2.putText(frame,('goingdown:-')+str(d),(60,90),cv2.FONT_HERSHEY_COMPLEX,0.8,(0,255,255),2)

    cv2.putText(frame,('goingup:-')+str(u),(60,130),cv2.FONT_HERSHEY_COMPLEX,0.8,(0,255,255),2)
    cv2.imshow("RGB", frame)
    
    if cv2.waitKey(1)&0xFF==27:
        break
cap.release()
cv2.destroyAllWindows()

Here’s the error that I am getting:

error: OpenCV(4.8.0) D:\a\opencv-python\opencv-python\opencv\modules\highgui\src\window.cpp:1255: error: (-2:Unspecified error) The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Cocoa support. If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script in function 'cvNamedWindow'
2

looks like you accidentally installed the headless pip package, which comes without any gui (to be used on webservers, etc.) so:

pip uninstall <what you have now>
pip install opencv_python
3

Hello Berak, thanks for helping.

I am still getting the same error.

4

I tried creating a new environment to install opencv, but I still get the same error when I use it.

5

I have used the following script and now my code is running again. However, it is very slow.

pip cache purge