在Python中保存后，OpenCV视频不会播放

Question

在Python上将分辨率更改为300x300后，我试图保存一个视频，但我的视频在保存后无法播放

0xc10100be error: "This file isn't playable. That might be because the file type is unsupported, the file extension is incorrect, or the file is corrupt."

这是我的节目：

import numpy as np
import cv2

cap = cv2.VideoCapture("F:\\mi\\Camera\\2b7d9eccaddffffe3c9ba70b7fe6c12e(0).mp4")
cv2.namedWindow("vid1", 0)
cv2.resizeWindow("vid1", 300,300)

fourcc = cv2.VideoWriter_fourcc(*'XVID')
out = cv2.VideoWriter('output.avi', fourcc, 20.0, (300,300))

while(cap.isOpened()):
    ret, frame = cap.read()
    cv2.imshow('vid1',frame)
    out.write(frame)                            
    if cv2.waitKey(25) & 0xFF == ord('q'):
        break

cap.release()
out.release()
cv2.destroyAllWindows()

怎么了

Answer 1

在我看来，你没有用“out”做任何事情

您应该添加：

out.write(frame)

在循环内部

Answer 2

在向我的老师询问这个问题后，他修改了我的程序：

import numpy as np
import cv2

cap = cv2.VideoCapture("F:\\mi\\Camera\\2b7d9eccaddffffe3c9ba70b7fe6c12e(0).mp4")
cv2.namedWindow('frame',0)
cv2.resizeWindow('frame',300,300)
fourcc = cv2.VideoWriter_fourcc(*'XVID')
out = cv2.VideoWriter('output.avi', fourcc, 20.0, (300,300))

while(cap.isOpened()):
    ret, frame = cap.read()
    if ret:
        vidout=cv2.resize(frame,(300,300)) #create vidout funct. with res=300x300
        out.write(vidout) #write frames of vidout function
        cv2.imshow('frame',frame)
        if cv2.waitKey(1) & 0xFF == ord('q'):
            break
    else:
        break
cap.release()
out.release()
cv2.destroyAllWindows()

谢谢你关注我的问题