autocast/encode.bash

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#!/bin/bash
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#
# encode.bash - Drives a set of encoders and tagging utilities to convert a
# single WAV input file into flac, Ogg Vorbis, AAC and MP3 files with complete
# and consistent metadata.
#
# Copyright (c) 2010, Thomas Gideon
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of Thomas Gideon nor the
# names of additional contributors may be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
if [ -z "$1" ]
then
echo "Provide a cast type!"
echo "$0 <cast type> <slug> [date]"
exit 1
fi
type=$1
if [ -z "$2" ]
then
echo "Provide a slug!"
echo "$0 <cast type> <slug> [date]"
exit 2
fi
slug=$2
if [ -z "$3" ]
then
date=$(date +%Y-%m-%d)
year=$(date +%Y)
post_date=$(date +%Y/%m/%d)
else
date=$(date +%Y-%m-%d -d $3)
year=$(date +%Y -d $3)
post_date=$(date +%Y/%m/%d -d $3)
fi
echo $date
# assemble common values for tags/comments
title="The Command Line ${date}"
artist="Thomas Gideon"
cover="${HOME}/Dropbox/Public/color_cover_art.jpg"
album="The Command Line"
genre="Podcast"
url="http://thecommandline.net/${post_date}/${slug}/"
copyright="http://creativecommons.org/licenses/by-sa/3.0/us"
comment="Weekly ${type} cast. Email to feedback@thecommandline.net. Show notes and license information for this episode at ${url}."
# lossless encoding
flac \
--picture="|image/jpeg|||${cover}" \
--tag=title="${title}" \
--tag=artist="${artist}" \
--tag=album="${album}" \
--tag=year="${year}" \
--tag=genre="${genre}" \
--tag=composer="${artist}" \
--tag=comment="${comment}" \
--tag=url="${url}" \
--tag=copyright="${copyright}" \
cmdln.net_${date}.wav
# AAC encoding, lossy
faac -q 100 \
-b 112 \
-c 44100 \
-o cmdln.net_${date}.m4a \
--title "${title}" \
--artist "${artist}" \
--album "${album}" \
--year "${year}" \
--genre "${genre}" \
--writer "${artist}" \
--comment "${comment}" \
--cover-art "${cover}" \
cmdln.net_${date}.wav
# put together the just-so input file for mp4chaps
echo "00:00:00.000 Start" > \
cmdln.net_${date}.chapters.txt
grep "{{offset|" ~/Documents/cmdln_notes/weekly_archive/${date}.notes | \
sed -e "s/.*offset|\(.*\)}}.*|\(.*\)}}.*/\1 \2/" >> \
cmdln.net_${date}.chapters.txt
# write the chapter marks to the AAC/MP4 file
mp4chaps -o -z -i cmdln.net_${date}.m4a
# encode the Ogg Vorbis from the flac copies the tags/comments
# already set into the flac file except the cover art;
# using metaflac, can encode the binary block in flac
# per the latest recommendations from Xiph for cover art
oggenc \
-q 4 \
--comment=METADATA_BLOCK_PICTURE="$(metaflac --export-picture-to=- cmdln.net_${date}.flac| base64 -w 0)" \
cmdln.net_${date}.flac
# encode lossy, MP3, adding ID3v2 tags for everything
# *except* cover art
lame -b 112 \
--cbr \
--tt "${title}" \
--ta "${artist}" \
--tl "${album}" \
--ty "${year}" \
--tc "${comment}" \
--tg "${genre}" \
--id3v2-only \
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--noreplaygain \
cmdln.net_${date}.wav \
cmdln.net_${date}.mp3
# lame package from Lucid lacks the --ti switch for image
# found eyed3 via a web search
eyeD3 --add-image ${cover}:FRONT_COVER \
--set-text-frame="TCOP:${copyright}" \
cmdln.net_${date}.mp3