remove frames that should have been skipped by the Faceswap -een arg

prune.py

#!/usr/bin/env python3
import argparse
import re
import os
import os.path


def frame_of( filename ):
    return int(re.search( '_(\d+)_\d+\.png$', filename ).group(1))


parser = argparse.ArgumentParser(description='TODO')
parser.add_argument( 'facedir' )
parser.add_argument( '-k', '--keep', type=int, default=6 )
args = parser.parse_args()


for f in sorted(os.listdir(args.facedir)):
    frame = frame_of(f)
    if ((frame - 1) % args.keep != 0):
        path = os.path.join( args.facedir, f )
        print( "\tDEL:", path )
        os.remove(path)