splitnh

#! /usr/bin/env python3
import os, sys
from PIL import Image
if len(sys.argv) > 1:
    name = sys.argv[1]
    with Image.open(name) as img:
        base_name = os.path.splitext(name)[0]
        img.convert('RGB').save(base_name + "_n.tga")
        img.convert('RGBA').getchannel('A').save(base_name + "_h.tga")