Read ADB screencap raw image using python

cmd = 'adb exec-out screencap'
pipe = subprocess.Popen(cmd, stdout=subprocess.PIPE, shell=True)
img_bytes = pipe.stdout.read()

img = np.array(Image.frombuffer('RGBA', (960, 540), img_bytes[12:], 'raw', 'RGBX', 0, 1))

References
https://stackoverflow.com/questions/22034959/what-format-does-adb-screencap-sdcard-screenshot-raw-produce-without-p-f