python-视频分帧&多帧合成视频

1.视频分帧： 

import cv2
vidcap = cv2.VideoCapture('005.avi')
success,image = vidcap.read()
count = 0
success = True
while success:
  success,image = vidcap.read()
  cv2.imwrite("frame%d.jpg" % count, image)     # save frame as JPEG file
  if cv2.waitKey(10) == 27:                     
      break
  count += 1

2.多帧合成视频：

import cv2

def images_to_video():
    fps = 30  # 帧率
    num_frames = 500
    img_array = []
    img_width = 720
    img_height = 1280
    for i in range(num_frames+1):
        filename = "./frames/"+str(i)+".png"
        img = cv2.imread(filename)

        if img is None:
            print(filename + " is non-existent!")
            continue
        img_array.append(img)

    out = cv2.VideoWriter('demo.avi', cv2.VideoWriter_fourcc(*'DIVX'), fps,(img_width,img_height))

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


def main():
   
    images_to_video()


if __name__ == "__main__":
    main()