docs: comments for future ffmpeg use

main.lua

@@ -0,0 +1,35 @@
+------------------------------
+------- Main Lua Script ------
+------------------------------
+
+------------------------------
+---------- Variables ---------
+------------------------------
+
+-- path to traverse
+local path=''
+
+-- file type to look for to examine
+local file_type='m4a'
+
+-- encoding to convert from
+local input_encoding='alac'
+
+-- encoding to convert TODO
+local output_encoding='flac'
+
+------------------------------
+-------- Functions -----------
+------------------------------
+
+
+------------------------------
+---------- Body --------------
+------------------------------
+
+-- TODO: check if ffmpeg is installed/available
+-- TODO: Loop through the path provided
+-- TODO: Check if the file is the file_type
+-- TODO: Check if the file has the encoding of ALAC
+---- Use the hint found at https://stackoverflow.com/questions/10934936/determine-whether-an-audio-file-is-encoded-in-apple-lossless-alac
+---- ffprobe -v error -select_streams a:0 -show_entries stream=codec_name -of default=noprint_wrappers=1:nokey=1 file.m4a