使用 cv2.videowrite() 创建的视频无法播放？

Question

import numpy
import cv2
import random
image=cv2.imread(r"C:\Users\Sriram\Desktop/img.png")
print(image.shape)
image=cv2.resize(image,(1080,600))
fourcc=cv2.VideoWriter_fourcc(*"MP4V")
def rand():
    n=random.randrange(0,255,15)
    x=random.randrange(0,255,15)
    y=random.randrange(0,255,15)

    return cv2.copyMakeBorder(image,40,40,40,40,cv2.BORDER_CONSTANT,None,(x,n,y))
#cv2.imwrite(r"C:\Users\Sriram\Desktop/new.jpg",image)
l=[rand() for i in range(30)]
print(l)
video=cv2.VideoWriter(r"C:\Users\Sriram\Desktop/video.mp4",fourcc,25,(1080,600))
for i in l:
    video.write(i)

cv2.destroyAllWindows()
video.release()

这是我的代码，仅通过更改图像的边框就可以从图像创建视频并且它有效并且输出视频 file.but 视频文件无法在我的电脑中打开 当我尝试播放视频时出现错误的压缩代码 fourcc 我尝试了不同的 fourcc "xvid"、"mpv4"、"mpjg"没有成功

Answer 1

您的输出视频帧大小不正确。您的输入帧大小为 (1080,600)。我们在每边添加了 40px 边框，所以最终的框架尺寸将是 (1080+40*2,600+40*2) 即 (1160,680)

import numpy
import cv2
import random
image=cv2.imread(r"C:\Users\Sriram\Desktop/img.png")
print(image.shape)
image=cv2.resize(image,(1080,600))
fourcc=cv2.VideoWriter_fourcc(*"MP4V")
def rand():
    n=random.randrange(0,255,15)
    x=random.randrange(0,255,15)
    y=random.randrange(0,255,15)

    return cv2.copyMakeBorder(image,40,40,40,40,cv2.BORDER_CONSTANT,None,(x,n,y))
#cv2.imwrite(r"C:\Users\Sriram\Desktop/new.jpg",image)
l=[rand() for i in range(30)]
print(l)
video=cv2.VideoWriter(r"C:\Users\Sriram\Desktop/video.mp4",fourcc,25,(1160,680))
for i in l:
    video.write(i)

cv2.destroyAllWindows()
video.release()

使用 cv2.videowrite() 创建的视频无法播放？

video created using cv2.videowrite() does not play?

python

opencv

cv2