MP4不起作用用于制作框架的视频，但AVI起作用

发布于 2025-01-25 10:29:55 字数 681 浏览 1 评论 0原文

我正在使用以下代码从我拥有的图片中创建电影，并使用以下代码段：

import cv2
import os

image_folder = 'shots'
video_name = 'video.avi'
fps = 25

images = [img for img in os.listdir(image_folder) if img.endswith(".png")]

images = sorted(images)[:][:steps]

frame = cv2.imread(os.path.join(image_folder, images[0]))
height, width, layers = frame.shape

video = cv2.VideoWriter(video_name, 0, fps, (width, height))

for image in images:
  video.write(cv2.imread(os.path.join(image_folder, image)))

cv2.destroyAllWindows()
video.release()

问题是，当我将扩展名更改为mp4时，它不起作用。如何更改代码以使其能够工作？ mp4的原因是该过程的速度非常慢，我认为这是因为avi比mp4具有更高的质量。

原文

I am using the following code to create a movies out of pictures that I have and use the following code snippet:

import cv2
import os

image_folder = 'shots'
video_name = 'video.avi'
fps = 25

images = [img for img in os.listdir(image_folder) if img.endswith(".png")]

images = sorted(images)[:][:steps]

frame = cv2.imread(os.path.join(image_folder, images[0]))
height, width, layers = frame.shape

video = cv2.VideoWriter(video_name, 0, fps, (width, height))

for image in images:
  video.write(cv2.imread(os.path.join(image_folder, image)))

cv2.destroyAllWindows()
video.release()

The problem is that when I change the extension to mp4 it does not work. How can I alter my code so that I can get it to work? The reason for mp4 is the speed of the process which is very slow and I think it is because avi has more quality than mp4.

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当梦初醒 2025-02-01 10:29:55

在cv2.VideWriter语法中具有（文件名，fourcc，fps，frameSize）这些参数您缺少一个称为fourcce> fourcc的参数（fourcc：4--编解码器的字符代码用于压缩帧）

import cv2
import os

image_folder = 'shots'
video_name = 'video.mp4'
fps = 25

images = [img for img in os.listdir(image_folder) if img.endswith(".png")]

images = sorted(images)[:][:steps]

frame = cv2.imread(os.path.join(image_folder, images[0]))
height, width, layers = frame.shape

video = cv2.VideoWriter(video_name,cv2.VideoWriter_fourcc(*'MP4V'), fps, (width, height))

for image in images:
  video.write(cv2.imread(os.path.join(image_folder, image)))

cv2.destroyAllWindows()
video.release()

In cv2.VideoWriter syntax have (filename, fourcc, fps, frameSize) these parametrs you are missing one parameter called fourcc (fourcc: 4-character code of codec used to compress the frames)

import cv2
import os

image_folder = 'shots'
video_name = 'video.mp4'
fps = 25

images = [img for img in os.listdir(image_folder) if img.endswith(".png")]

images = sorted(images)[:][:steps]

frame = cv2.imread(os.path.join(image_folder, images[0]))
height, width, layers = frame.shape

video = cv2.VideoWriter(video_name,cv2.VideoWriter_fourcc(*'MP4V'), fps, (width, height))

for image in images:
  video.write(cv2.imread(os.path.join(image_folder, image)))

cv2.destroyAllWindows()
video.release()

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