增加帧数会减少opencv videowriter中视频的持续时间吗？

问题描述

我有一个包含多个图像文件的文件夹。我将它们结合起来以15fps的速度编写视频。问题是由于某种原因，输出的最终视频的大小没有增加。 代码如下所示：

out = cv2.VideoWriter('project.avi',cv2.VideoWriter_fourcc(*'DIVX'),15,size)
for filename in glob.glob('/mnt/d/projects/sample_vids/*.jpeg'):
    print("h1")
    for i in range(1440):
        print(i)
        img = cv2.imread(filename)
        height,width,layers = img.shape
        # size = (width,height)
        # dim_width = int(img.shape[1] * scale_percent / 100)
        # dim_height = int(img.shape[0] * scale_percent / 100)
        # dim = (dim_width,dim_height)

        resized = cv2.resize(img,(size[0] + i,size[1] + i),interpolation=cv2.INTER_AREA)
        out.write(resized)
out.release()

在上面的代码中，将1440更改为120，结果与之前几乎相同。不确定，我在哪里弄错了

解决方法

• 1. 使用glob
  收集所有图像

  import cv2
  import glob 
  
  img_array = []
  for i,filename in enumerate(glob.glob('/mnt/d/projects/sample_vids/*.jpeg')):
      img = cv2.imread(filename)
      height,width,layers = img.shape
      size = (width,height)
      resized = cv2.resize(img,(size[0] + i,size[1] + i),interpolation=cv2.INTER_AREA)
      img_array.append(resized)
  

• 1. 初始化。 VideoWriter

  out = cv2.VideoWriter('project.avi',cv2.VideoWriter_fourcc(*'DIVX'),15,size)
  

• 1. 创建视频

  for i in range(len(img_array)):
    out.write(img_array[i])
  out.release()