VideoWriter输出损坏的视频文件 [英] VideoWriter outputs corrupted video file
本文介绍了VideoWriter输出损坏的视频文件的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
这是我保存web_cam流的代码.它可以正常工作,但是输出视频文件有问题.
This is my code to save web_cam streaming. It is working but the problem with output video file.
import numpy as np
import cv2
cap = cv2.VideoCapture(0)
# Define the codec and create VideoWriter object
#fourcc = cv2.cv.CV_FOURCC(*'DIVX')
#out = cv2.VideoWriter('output.avi',fourcc, 20.0, (640,480))
out = cv2.VideoWriter('output.avi', -1, 20.0, (640,480))
while(cap.isOpened()):
ret, frame = cap.read()
if ret==True:
frame = cv2.flip(frame,0)
# write the flipped frame
out.write(frame)
cv2.imshow('frame',frame)
if cv2.waitKey(1) & 0xFF == ord('q'):
break
else:
break
# Release everything if job is finished
cap.release()
out.release()
cv2.destroyAllWindows()
推荐答案
由于错误的帧速率和帧分辨率,输出文件已损坏.使用此代码:
The output file is corrupted because of the wrong frame rate and frame resolution. Using this code :
out = cv2.VideoWriter('output.avi', -1, 20.0, (640,480))
我们将每秒fps/帧速率设置为20.这是不正确的.此外,框架的宽度和高度是错误的.我通过从捕获的web_cam配置文件中获取fps,宽度,高度来解决.
We set the fps/frame rate per second 20. Which was not correct. Also, the frame width and height was wrong. I solved by getting fps, width, height from the captured web_cam profile.
cap = cv2.VideoCapture(0) #web-cam capture
fps = cap.get(cv2.CAP_PROP_FPS)
width = cap.get(cv2.CAP_PROP_FRAME_WIDTH) # float
height = cap.get(cv2.CAP_PROP_FRAME_HEIGHT) # float
out = cv2.VideoWriter('output.avi', -1,fps, (int(width), int(height)))
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