Repackage all h264 mkv files to mp4 files in the current folder.

mkv2mp4.py

#!/usr/env python

import os
import sh
import re

for fname in os.listdir("."):
    if not fname.endswith(".mkv"):
        continue
    new_name = fname[:-4] + ".mp4"

    if os.path.exists(new_name):
        continue

    meta = ""

    series = re.search(r'S(\d\d)', fname)
    episode = re.search(r'E(\d\d)', fname)

    meta = {
        'title': new_name[:-4]
    }
    if series and episode:
        meta['episode_id'] = '{}x{}'.format(int(series.group(1)), int(episode.group(1)))

        show_name = re.match(r'^(.*) S\d\d.*E\d\d.*', fname)
        meta['show'] = '{}'.format(show_name.group(1))

    args = ["-i", fname, '-vcodec', 'copy', '-acodec', 'copy']
    for k, v in meta.items():
        args += ['-metadata', "{}={}".format(k, v)]
    args += [new_name]
    try:
        print fname
        sh.ffmpeg(*args)
    except Exception as e:
        print e.stderr
        raise