将图像转换为.wav文件，反之亦然

Question

我尝试通过获取每个像素值进行转换，然后将其转换为字节格式，然后将其写为.wav文件。但是输出文件无法播放。我做错了什么？

        import cv2
    import numpy

    from tkinter.filedialog import askopenfilename

    file_path = askopenfilename(initialdir="C:/Users/Batman/Documents/Programming/tkinter/",
                               filetypes =(("jpg", "*.jpg"),("All Files","*.*")),
                               title = "Choose a file."
                               )


    img=cv2.imread(file_path,1)
    cv2.imshow('original',img)

    height, width, channels = img.shape

    s = b''

    for x in range(height):
        for y in range(width):
            for z in range(3): 
                int_num=int(img[x][y][z])

                s = s+ bytes([int_num])

    file = open("sbytes.wav", 'wb')
    file.write(s)
    file.close()

    cv2.waitKey(0)