mkalttree

Takes a tree of audio files (typically FLACs) and clones it into another directory, transcoded to a target codec. Converts multiple files in parallel.

usage: mkalttree [-h] [-c] [-f] [-X] [-j PROCESSES] [-n] [-l] [-q] {mp3,opus} SRCDIR DESTDIR

Transcodes a tree of audio files

positional arguments:
  {mp3,opus}            output codec
  SRCDIR                source base directory
  DESTDIR               destination base directory

options:
  -h, --help            show this help message and exit
  -c, --no-covers       don't copy cover art files
  -f, --force           also process up-to-date files
  -X, --ignore-exclude  ignore .exclude files
  -j PROCESSES, --jobs PROCESSES
                        number of processes to spawn
  -n, --dry-run         don't actually produce files
  -l, --copy-lossy      don't transcode lossy sources
  -q, --quiet           suppress progress output

Codec support

Codec	Input	Output
FLAC	Yes	No
MP3	Yes	Yes
Opus	Yes	Yes
Vorbis	Yes	No
AAC	Yes	No

Codec support is controlled by the CODEC_TABLE global dictionary in mkalttree. See the comments above it for a description of the format and how to add codecs or change the transcoding command.

Requirements

In its default configuration, this script requires:

• ffmpeg (with libmp3lame for MP3 support)
• opus-tools