Remuxes an audio file from an arbitary container into MKA with FFmpeg.

any2mka.py

import argparse
import subprocess
import typing
import re
import os
import glob
import sys

class FFmpegFail(Exception):
	def __init__(self, statuscode, *args):
		Exception.__init__(self, f"FFmpeg failed with a non-zero statuscode ({statuscode}).", *args)

class FFmpegRemuxIntoMKA(subprocess.Popen):
	"""Batch process a list of audio container 
	bytestreams and converts into the MKA container."""
	FILEEXTENSION_FIND = re.compile(r'\.[a-z0-9]+$')

	def __init__(self, remove_infile= False):
		self.ffmpeg_argv = ['ffmpeg',
			'-nostdin',
			'-i', '', #< Input filename (must contain extension).
			'-c', 'copy',
			'-vn', # disable video-streams to be MKA.
			'', #> Output filename (must contain extension).
			'-y', #> Force overwriting if exists.
		]

		self.replace_file = bool(remove_infile)

	def main(self, infiles: typing.Iterable[str]):
		"""Processes a list of files through FFmpeg.
		Raises `FFmpegFail` if FFmpeg exits with a non-zero status code."""
		for ifile in infiles:
			self.ffmpeg_argv[3] = ifile
			self.ffmpeg_argv[7] = self.FILEEXTENSION_FIND.sub('.mka', ifile)

			subprocess.Popen.__init__(self, self.ffmpeg_argv, stderr= subprocess.PIPE)
			(_, fflogs) = self.communicate()

			print("Remuxed: %s -> %s" % (ifile, self.ffmpeg_argv[7]), file= sys.stderr)

			if self.returncode != 0:
				raise FFmpegFail(self.returncode, self.ffmpeg_argv, fflogs)
			else:
				if self.replace_file:
					os.unlink(ifile)
					print("Removed: %s" % ifile, file= sys.stderr)

if __name__ == '__main__':
	optparser = argparse.ArgumentParser(
		prog=        "Any2MKA",
		description= "a simple remuxer used to remux audio files into the MKA audio file-format."
					"uses FFmpeg as the backend for this process.")

	optparser.add_argument('FILES',
		help= "Glob expression to grab the input files.",
		type= lambda f: glob.glob(f))

	optparser.add_argument('-r', '--replace',
		help= "Whether remove the input file after conversion.",
		dest= 'REPLACE_FILE', action= 'store_true')

	opts = optparser.parse_args()

	rmux = FFmpegRemuxIntoMKA(opts.REPLACE_FILE)
	rmux.main(opts.FILES)

This is made for my personal use, as you can see the code quality isn't good.

I'd not use this, nor do I currently.