Modified encode to be useful for multiple casts.

This commit is contained in:
Thomas Gideon 2010-11-05 12:20:09 -04:00
parent 4d09fd9ce3
commit 4300e276c0
2 changed files with 62 additions and 27 deletions

1
.gitignore vendored
View file

@ -11,3 +11,4 @@
*.mp3
*.m4a
*.chapters.txt
*.conf

View file

@ -28,17 +28,25 @@
# 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.
function clean {
if [ -f "$1" ]
then
echo "Cleaning existing file, $1."
rm $1
fi
}
if [ -z "$1" ]
then
echo "Provide a cast type!"
echo "$0 <cast type> <slug> [date]"
echo "$0 <cast config> <slug> [date]"
exit 1
fi
type=$1
config=$1
if [ -z "$2" ]
then
echo "Provide a slug!"
echo "$0 <cast type> <slug> [date]"
echo "$0 <cast config> <slug> [date]"
exit 2
fi
slug=$2
@ -52,21 +60,35 @@ else
year=$(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}."
# load info from cast specific config file
. $config
if [ -z "${file_prefix}" ]
then
echo "${config} must set file_prefix."
exit 1
fi
echo "Info for tagging."
echo "Title: $title"
echo "Artist: $artist"
echo "Cover: $cover"
echo "Album: $album"
echo "Genre: $genre"
echo "URL: $url"
echo "Copyright: $copyright"
echo "Comment: $comment"
base_file=${file_prefix}${date}
echo ""
echo "Encoding MP3, ${base_file}.mp3 at ${mp3_bitrate} kbps."
clean "${base_file}.mp3"
echo ""
# encode lossy, MP3, adding ID3v2 tags for everything
# *except* cover art
lame -b 112 \
lame -b ${mp3_bitrate} \
--cbr \
--tt "${title}" \
--ta "${artist}" \
@ -76,15 +98,19 @@ lame -b 112 \
--tg "${genre}" \
--id3v2-only \
--noreplaygain \
cmdln.net_${date}.wav \
cmdln.net_${date}.mp3
${base_file}.wav \
${base_file}.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
${base_file}.mp3
echo ""
echo "Encoding ${base_file}.flac."
clean "${base_file}.flac"
echo ""
# lossless encoding
flac \
--picture="|image/jpeg|||${cover}" \
@ -97,14 +123,18 @@ flac \
--tag=comment="${comment}" \
--tag=url="${url}" \
--tag=copyright="${copyright}" \
cmdln.net_${date}.wav
${base_file}.wav
echo ""
echo "Encoding ${base_file}.m4a at ${aac_quality}."
clean "${base_file}.m4a"
echo ""
# AAC encoding, lossy
# docs recommend against setting bandwidth and bitrate setting
# doesn't seem to result in the desired quality as tweaking
# the quality setting (max 500)--200 was arrived at by iteratively
# encoding the same raw audio and subjective listening to the results
faac -q 200 \
faac -q ${aac_quality} \
-o cmdln.net_${date}.m4a \
--title "${title}" \
--artist "${artist}" \
@ -114,23 +144,27 @@ faac -q 200 \
--writer "${artist}" \
--comment "${comment}" \
--cover-art "${cover}" \
cmdln.net_${date}.wav
${base_file}.wav
# put together the just-so input file for mp4chaps
echo "00:00:00.000 Start" > \
cmdln.net_${date}.chapters.txt
grep "{{offset|" ~/Documents/cmdln_notes/weekly_archive/${date}.notes | \
${base_file}.chapters.txt
grep "{{offset|" ${aac_notes_path}/${date}.notes | \
sed -e "s/.*offset|\(.*\)}}.*|\(.*\)}}.*/\1 \2/" >> \
cmdln.net_${date}.chapters.txt
${base_file}.chapters.txt
# write the chapter marks to the AAC/MP4 file
mp4chaps -o -z -i cmdln.net_${date}.m4a
mp4chaps -o -z -i ${base_file}.m4a
echo ""
echo "Encoding ${base_file}.ogg at quality ${ogg_quality}."
clean "${base_file}.ogg"
echo ""
# 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 5 \
--comment=METADATA_BLOCK_PICTURE="$(metaflac --export-picture-to=- cmdln.net_${date}.flac| base64 -w 0)" \
cmdln.net_${date}.flac
-q ${ogg_quality} \
--comment=METADATA_BLOCK_PICTURE="$(metaflac --export-picture-to=- ${base_file}.flac| base64 -w 0)" \
${base_file}.flac