import cv2 as cv
import yuvio
import os
import cv2 as cv
import numpy as np#参考：https://pypi.org/project/yuvio/yuv_frame = yuvio.imread("my.yuv", 720, 640, 'yuyv422')y = yuv_frame.y
u = yuv_frame.u
v = yuv_frame.vcv.imshow('y',y)reshaped_y = y.reshape(720,640)
reshaped_u = u.reshape(720,320)
reshaped_v = v.reshape(720,320)img = "my.jpg"
outImg = "out.jpg"cv.imwrite(img, y)
im = cv.imread(img)
##截取图像高从25到479，宽从0到720
im = im[25:479,0:720]
cv.imwrite(outImg, im)
cv.waitkey(0)

参考：

YUV Colorspace

https://github.com/labradon/yuvio/blob/main/README.md

另外下面代码yuv420p的转换，来自于网上。

import os
import cv2 as cv
import numpy as np# 读取yuv420p的一帧文件，并转化为png图片
if __name__ == '__main__':filepath = 'test.yuv'binfile = open(filepath, 'rb')size = os.path.getsize(filepath)image_width = 720image_hight = 640image_y = [[0] * image_width for i in range(image_hight)]image_u = [[0] * image_width for i in range(image_hight)]image_v = [[0] * image_width for i in range(image_hight)]for r in range(image_hight):for c in range(image_width):image_y[r][c] = binfile.read(1)[0]Image_Y = np.array(image_y)for r in range(int(image_hight / 2)):for c in range(int(image_width / 2)):pixel = binfile.read(1)[0]image_u[2 * r + 0][2 * c + 0] = pixelimage_u[2 * r + 1][2 * c + 0] = pixelimage_u[2 * r + 0][2 * c + 1] = pixelimage_u[2 * r + 1][2 * c + 1] = pixelImage_U = np.array(image_u)for r in range(int(image_hight / 2)):for c in range(int(image_width / 2)):pixel = binfile.read(1)[0]image_v[2 * r + 0][2 * c + 0] = pixelimage_v[2 * r + 0][2 * c + 1] = pixelimage_v[2 * r + 1][2 * c + 0] = pixelimage_v[2 * r + 1][2 * c + 1] = pixelImage_V = np.array(image_v)binfile.close()compose = np.array([Image_Y, Image_V, Image_U]).transpose([1, 2, 0]).astype(np.uint8)#compose = np.array([Image_Y, Image_U, Image_V]).transpose([1, 2, 0]).astype(np.uint8)Image = cv.cvtColor(compose, cv.COLOR_YUV2RGB)#Image = cv.cvtColor(compose, cv.COLOR_YUV2BGR)cv.imwrite("one_frame_of_highway.yuv.png", Image)