Convert rgba 10bit to 8 bit, cut last vertical and horizontal lines and changing channel layout

frame_conv_numpy.py

import numpy as np
x = np.fromfile(r'1920x1080BGRA16.raw', np.uint16)
y = x/256
z= y.astype(np.uint8)
z.tofile('1920x1080BGRA.raw')
w= np.zeros((1919*1079*4), np.uint8)
for i in range(1079):
    #cut with reordering BGRA ->  ARGB
    for j in range(1919):
        w[j*4 +     1919*4*i ] = z[j*4 + 3 + 1920*4*i]
        w[j*4 + 1 + 1919*4*i ] = z[j*4 + 2 + 1920*4*i]
        w[j*4 + 2 + 1919*4*i ] = z[j*4 + 1 + 1920*4*i]
        w[j*4 + 3 + 1919*4*i ] = z[j*4     + 1920*4*i]
        
  #simple cut
  #w[1919*4*i:1919*4*(i+1)] = z[1920*4*i:1920*4*i+1919*4]
    
w.tofile('1919x1079ARGB_8b.raw')