在 python 中使用 OpenCV 2.4.0 创建视频
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Creating a video using OpenCV 2.4.0 in python
提问by ATOzTOA
I am trying to create a video using OpenCV 2.4.0in python 2.7.2. But the avifile size is 0.
我正在尝试使用OpenCV 2.4.0in创建视频python 2.7.2。但是avi文件大小为0。
My code:
我的代码：
from cv2 import *
im1 = cv.LoadImage("1.jpg")
fps = 20
frame_size = cv.GetSize(im1)
#writer = cv.CreateVideoWriter("out.avi", CV_FOURCC('M', 'J', 'P', 'G'), fps, frame_size, True)
v = VideoWriter()
v.open("out.avi", cv.CV_FOURCC('F', 'M', 'P', '4'), fps, (800,600), True)
print v.isOpened()
isOpened()is always returning false.
isOpened()总是回来false。
Another try:
另一个尝试：
#!/usr/bin/env python
import sys
from cv2 import *
im1 = cv.LoadImage("1.jpg")
if not im1:
print "Error loading image"
im2 = cv.LoadImage("2.jpg")
if not im1:
print "Error loading image"
fps = 20
frame_size = cv.GetSize(im1)
writer = cv.CreateVideoWriter("out.avi", cv.CV_FOURCC('M', 'J', 'P', 'G'), fps, frame_size, True)
if not writer:
print "Error in creating video writer"
sys.exit(1)
else:
cv.WriteFrame(writer, im1)
cv.WriteFrame(writer, im2)
del writer
No errors, but the output is empty.
没有错误，但输出为空。
What am I missing?
我错过了什么？
采纳答案by Ayub Khan
import cv2
img1 = cv2.imread('1.jpg')
img2 = cv2.imread('2.jpg')
img3 = cv2.imread('3.jpg')
height , width , layers = img1.shape
video = cv2.VideoWriter('video.avi',-1,1,(width,height))
video.write(img1)
video.write(img2)
video.write(img3)
cv2.destroyAllWindows()
video.release()
A simple code for what you want to do. for details here
您想要做什么的简单代码。详情请看这里
回答by lama12345
Found this code, which works for me (generating colored noise):
找到了对我有用的代码（产生有色噪声）：
writer = cv2.VideoWriter("output.avi", cv2.VideoWriter_fourcc(*"MJPG"), 30,(640,480))
for frame in range(1000):
writer.write(np.random.randint(0, 255, (480,640,3)).astype('uint8'))
writer.release()
Source: https://github.com/ContinuumIO/anaconda-issues/issues/223#issuecomment-285523938
来源：https: //github.com/ContinuumIO/anaconda-issues/issues/223#issuecomment-285523938
回答by YakovK
height, width, layers = img.shape
out = cv2.VideoWriter("output.avi", cv2.VideoWriter_fourcc(*"XVID"), 30,(width,height))
out.write(img)
out.release()
