import cv2
import numpy as np
# 读取三角形
triangle = cv2.imread('triangle.png')
fps = 24
# 视频格式
fourcc = cv2.VideoWriter_fourcc('M', 'J', 'P', 'G')
# 定义视频对象
videoWriter = cv2.VideoWriter('缩放.avi', fourcc, fps, (500, 500))
# 1倍缩小到0.2倍
for i in range(1, 8):
# 锁定视频总的大小，否则图像大小不同无法接成视频
back = np.zeros([500, 500, 3], dtype='uint8')
# 1按照每帧0.1倍的速度缩小到0.2倍
img12 = cv2.resize(triangle, (int(triangle.shape[1] * (1 - 0.1 * i)), int(triangle.shape[0] * (1 - 0.1 * i))))
for j in range(3):
back[:img12.shape[0], :img12.shape[1], j] = img12[:, :, j]
videoWriter.write(back)
for i in range(8, 1, -1):
back = np.zeros([500, 500, 3], dtype='uint8')
# 0.2按照每帧0.1倍的速度方法到1倍
img12 = cv2.resize(triangle, (int(triangle.shape[1] * (1 - 0.1 * i)), int(triangle.shape[0] * (1 - 0.1 * i))))
for j in range(3):
back[:img12.shape[0], :img12.shape[1], j] = img12[:, :, j]
videoWriter.write(back)
videoWriter.release()
