OpenCV錯誤：錯誤：（-215）scn == 3 || scn == 4在函數cv :: cvtColor

Question

我已經閱讀了許多關於包含文件完整路徑的解決方案，並且已經嘗試過了，但它不工作！

這是基本的代碼上我的工作：

import numpy as np 
import cv2 
import sys 
import os 

# capture frames from a video 
cap = cv2.VideoCapture('F:\KUNAL ECE\SPIG\ video.avi') 
#cap = cv2.VideoCapture(sys.argv[1]) 
# Trained XML classifiers describes some features of some object we want to detect 
car_cascade = cv2.CascadeClassifier('F:\KUNAL ECE\SPIG\cars.xml') 

# loop runs if capturing has been initialized. 
while True: 
    # reads frames from a video 
    ret, frames = cap.read() 

    # convert to gray scale of each frames 
    gray = cv2.cvtColor(frames, cv2.COLOR_BGR2GRAY) 

這是我收到的錯誤： -

OpenCV Error: Assertion failed (scn == 3 || scn == 4) in cv::cvtColor, file C:\projects\opencv-python\opencv\modules\imgproc\src\color.cpp, line 9748 
Traceback (most recent call last): 
    File "F:\KUNAL ECE\SPIG\car.py", line 20, in <module> 
    gray = cv2.cvtColor(frames, cv2.COLOR_BGR2GRAY) 
cv2.error: C:\projects\opencv-python\opencv\modules\imgproc\src\color.cpp:9748: error: (-215) scn == 3 || scn == 4 in function cv::cvtColor 

warning: Error opening file (/build/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:779) 
warning: F:\KUNAL ECE\SPIG\ video.avi (/build/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:780) 
[Finished in 0.5s] 

請幫助！

Answer 1

我認爲opencv沒有找到/讀取您指定的avi文件。嘗試串

在消除空間「F：/ KUNAL ECE/SPIG/video.avi」