【发布时间】：2017-07-23 21:16:35
【问题描述】：
我已经阅读了许多关于包含文件完整路径的解决方案并尝试过，但它不起作用！
这是我正在处理的基本代码：
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)
这是我得到的错误：-
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]
请帮忙！！
【问题讨论】：
标签： python python-2.7 opencv numpy computer-vision