jpg图片转换成yuv420(NV12)数据文件

代码功能：将文件夹下所有jpg文件转换成同名的yuv文件。

yuv文件是yuv420（NV12）格式的数据位，文件内容为yyyyyyyyy…uvuvuv…

import os
import cv2
from tqdm import tqdm


def bgr2yuv420bin(path_yuv, img_bgr):
    yuv = cv2.cvtColor(img_bgr, cv2.COLOR_BGR2YUV)
    y = yuv[:, :, 0]
    u = yuv[:, :, 1]
    v = yuv[:, :, 2]
    u = cv2.resize(u, (int(u.shape[1] / 2), int(u.shape[0] / 2)))
    v = cv2.resize(v, (int(v.shape[1] / 2), int(v.shape[0] / 2)))
    with open(path_yuv, 'wb') as f:
        for row in range(y.shape[0]):
            for col in range(y.shape[1]):
                f.write(y[row, col])
        for row in range(u.shape[0]):
            for col in range(u.shape[1]):
                f.write(u[row, col])
                f.write(v[row, col])


path_jpg = r'/media/fang/Samsung USB/tsr/input_src/weight'  # jpg图片路径 不要有中文
path_output = r'/media/fang/3441-913C/tsr/test'  # 输出yuv文件路径

for root, dirs, files in os.walk(path_jpg):
    for file in tqdm(files):
        img = cv2.imread(root   '/'   file)
        bgr2yuv420bin(path_output   '/'   file.replace('jpg', 'yuv'), img)

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