Convert all video files under current folder to mp4

convert.py

import os, os.path
import subprocess

def convert(in_name, out_name, delete=True):
    prog = "ffmpeg"
    params = ["-i", "{}".format(in_name),
              "-pix_fmt", "yuv420p",
              "-vcodec", "libx264",
              "{}".format(out_name)]
    res = subprocess.call([prog, *params])
    if delete:
        os.remove(in_name)
    return res

for line in os.walk("./"):
    base, sub_dir, files = line
    if (len(files) > 0):          # True files, not dirs
        for f in files:
            f_name, ext = os.path.splitext(f)
            full_path = os.path.join(base, f)
            if ext in (".mp4", ".webm", ".ogg"):         # Can use preview
                print("Omitted: {}".format(full_path))
                continue
            elif ext in (".rm", ".rmvb", ".wmv",
                         ".mkv", ".mpg", ".mov",
                         ".flv", "avi"):
                convert_path = os.path.join(base, "{}.mp4".format(f_name))
                res = convert(in_name=full_path, out_name=convert_path,
                              delete=True)
                print("Convert: {} -> {} with code {}".format(full_path,
                                                              convert_path,
                                                              res))