# Output format: album/tracks.format
-o "%(album,playlist_title)U/%(track_number,playlist_index)s - %(title)U.%(ext)s"
--windows-filenames
# --restrict-filenames

# Extract audio
-f bestaudio
--extract-audio
--audio-format mp3

# Thumbnail squared
--convert-thumbnails png
--ppa "ThumbnailsConvertor+ffmpeg_o:-c:v png -vf crop=\"'if(gt(ih,iw),iw,ih)':'if(gt(iw,ih),ih,iw)'\""
--embed-thumbnail

# Metadata, with playlist number as track number if the latter is missing
--embed-metadata
--parse-metadata "playlist_index:%(track_number)s"

# Misc
--no-overwrites
--concurrent-fragments 4