encode-podcast.sh

#!/bin/bash

# Encode a WAV to a finalized podcast MP3 with metadata, in the current directory
# Requires lame
# With Homebrew on Mac OS X: brew install lame

# Usage:
# Call the script with three arguments:
# 	-t or --title followed by the title of the episode in quotes
# 	-s or --summary followed by the iTunes Summary for the episode, in quotes
# 	the name of the file, which is assumed to have the episode number in it.
#
# So, for episode 104, the correct syntax would be:
#
# encode-podcast.sh -t "Minutiæ" -s "Please email us about Photos.app, UXKit, and React." atp104.wav

for ARGS in "$@"
do
	case "$ARGS" in
		-t|--title)
				shift
				EPISODE_TITLE="$1"
				shift
		;;

		-s|--summary)
				shift
				EPISODE_SUMMARY="$1"
				shift
		;;

		-*|--*)
				echo "	$NAME [warning]: Don't know what to do with arg: $1"
				exit 1
		;;
	esac
done # for args

INPUT_WAV_FILE="$@"

	# Strip everything from the filename except the numbers
EPISODE_NUMBER=`echo "$INPUT_WAV_FILE" | sed 's#.*/##g' | tr -dc '[0-9]'`

echo "
 INPUT_WAV_FILE:	$INPUT_WAV_FILE
  EPISODE_TITLE: 	$EPISODE_TITLE
 EPISODE_NUMBER:	$EPISODE_NUMBER
EPISODE_SUMMARY: 	$EPISODE_SUMMARY
"

SHOW_AUTHOR="ATP"

# Artwork: ideally 1400x1400, but less than 128 KB to maximize compatibility
ARTWORK_JPG_FILENAME="${HOME}/Dropbox/ATP/Artwork.jpg"

# Output quality (kbps): 96 or 64 recommended
MP3_KBPS=96

# Really long lines make baby Jesus cry
lame --noreplaygain --cbr -h -b $MP3_KBPS \
--resample 44.1 --tt "$EPISODE_NUMBER: $EPISODE_TITLE" --tc "$EPISODE_SUMMARY" \
--ta "$SHOW_AUTHOR" --tl "$SHOW_AUTHOR" --ty `date '+%Y'` --ti "$ARTWORK_JPG_FILENAME" \
--add-id3v2 "$INPUT_WAV_FILE" "${INPUT_WAV_FILE%%.wav}.mp3"