cuetoflacs.lua

#!/usr/bin/env lua
require("cue") -- https://github.com/TheLinx/LuaCue/

if not (arg[1] and arg[2]) then
  print("usage: cuetoflacs.lua in.cue out-dir")
  os.exit()
end

dir = arg[1]:match("(.+/).+") or "./"

if arg[3] then
  run = print
else
  run = os.execute
end

local fhand = assert(io.open(arg[1], "r"))
local sheet = cue.decode(fhand)
s = ('ffmpeg -i "%s%s"'):format(dir, sheet.filename) -- prepare our command line
for k, v in pairs(sheet.tracks) do
  local sstart, send = v.indices[1], sheet.tracks[k+1] and sheet.tracks[k+1].indices[1] -- get our indices
  print(("converting track #%02d - %s"):format(k, v.title)) -- verbosity
  local title = v.title:lower():gsub("[^%w- ]", ""):gsub(" .", string.upper):gsub(" ", "") -- apply my fascist file naming conventions
  title = title:sub(1,1):upper()..title:sub(2) -- it needs two steps.
  local fname = ("%s%02d-%s.flac"):format(arg[2], k, title) -- houston, we have a file name
  run(("%s -ss %s%s '%s' > /dev/null 2>&1"):format(s, sstart, (send and " -t "..(send - sstart) or ""), fname)) -- ffmpeg out the file.
  run(('metaflac --set-tag="ARTIST=%s" --set-tag="TITLE=%s" --set-tag="ALBUM=%s" --set-tag="TRACKNUMBER=%d" --set-tag="TOTALTRACKS=%d" %s --remove-tag=ENCODER'):format(v.performer, v.title, sheet.title, k, #sheet.tracks, fname)) -- apply vorbis comments.
end