python转yuyv422到jpg

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.v
 
cv.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 = 720
    image_hight = 640
    image_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] = pixel
            image_u[2 * r + 1][2 * c + 0] = pixel
            image_u[2 * r + 0][2 * c + 1] = pixel
            image_u[2 * r + 1][2 * c + 1] = pixel
    Image_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] = pixel
            image_v[2 * r + 0][2 * c + 1] = pixel
            image_v[2 * r + 1][2 * c + 0] = pixel
            image_v[2 * r + 1][2 * c + 1] = pixel
    Image_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)