cmd/ffstreams.py

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3.5 KiB
Python
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import argparse
import re
import subprocess
import sys
from voussoirkit import pathclass
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from voussoirkit import winglob
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from voussoirkit import winwhich
AUDIO_EXTENSIONS = {
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'aac': 'm4a',
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'ac3': 'ac3',
'flac': 'flac',
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'mp3': 'mp3',
'opus': 'opus',
'*': 'mka',
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}
SUBTITLE_EXTENSIONS = {
'ass': 'ass',
'subrip': 'srt',
'*': 'mks',
}
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FFMPEG = winwhich.which('ffmpeg')
def make_maps(input_file, prefix, search_pattern, extension_map, moveto=None):
input_file = pathclass.Path(input_file)
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if moveto is not None:
moveto = pathclass.Path(moveto)
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command = [FFMPEG, '-i', input_file.absolute_path]
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try:
output = subprocess.check_output(command, stderr=subprocess.STDOUT)
except subprocess.CalledProcessError as exc:
output = exc.output
output = output.decode('utf-8')
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maps = []
for line in output.splitlines():
match = re.search(search_pattern, line)
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if match is None:
continue
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(stream_index, codec) = (match.group(1), match.group(2))
extension = extension_map.get(codec, extension_map['*'])
output_filename = input_file.replace_extension('')
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output_filename = output_filename.add_extension(f'{prefix}{stream_index}.{extension}')
print(f'{stream_index}, codec={codec}, ext=.{extension}')
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if moveto:
output_filename = moveto.with_child(output_filename.basename)
args = ['-map', f'0:{stream_index}', '-c', 'copy']
if extension == 'mks':
args.extend(['-f', 'matroska'])
args.append(output_filename.absolute_path)
maps.extend(args)
return maps
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def audio_maps(input_file, moveto=None):
return make_maps(
input_file,
prefix='a',
search_pattern=r'Stream #0:(\d+)[^\s]*: Audio: (\w+)',
extension_map=AUDIO_EXTENSIONS,
moveto=moveto,
)
def subtitle_maps(input_file, moveto=None):
return make_maps(
input_file,
prefix='s',
search_pattern=r'Stream #0:(\d+)[^\s]*: Subtitle: (\w+)',
extension_map=SUBTITLE_EXTENSIONS,
moveto=moveto,
)
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def ffstreams(input_file, do_audios=False, do_subtitles=False, dry=False, moveto=None):
maps = []
if do_audios:
maps.extend(audio_maps(input_file, moveto=moveto))
if do_subtitles:
maps.extend(subtitle_maps(input_file, moveto=moveto))
if not maps:
return
command = [FFMPEG, '-i', input_file.absolute_path, *maps]
print(command)
if not dry:
subprocess.run(command, stderr=subprocess.STDOUT)
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def ffstreams_argparse(args):
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for pattern in args.input_filename:
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for input_filename in winglob.glob(pattern):
input_file = pathclass.Path(input_filename)
ffstreams(
input_file,
do_audios=args.audios,
do_subtitles=args.subtitles,
dry=args.dry,
moveto=args.moveto,
)
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def main(argv):
parser = argparse.ArgumentParser(description=__doc__)
parser.add_argument('input_filename', nargs='+')
parser.add_argument('--moveto', dest='moveto', default=None)
parser.add_argument('--audio', '--audios', dest='audios', action='store_true')
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parser.add_argument('--subtitles', '--subs', dest='subtitles', action='store_true')
parser.add_argument('--dry', dest='dry', action='store_true')
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parser.set_defaults(func=ffstreams_argparse)
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args = parser.parse_args(argv)
return args.func(args)
if __name__ == '__main__':
raise SystemExit(main(sys.argv[1:]))