MythTV transcode with x264

mythtv-transcode-x264.sh

#!/bin/sh
set -e

# Adapted from a script at http://eternalvoid.net/tutorials/mythtv-autotranscode/

# Arguments
# $1 must be the directory/file to be transcoded.
# $2 must be the output directory / file name. The directory must be writeable by the mythtv user
# $3 must be chanid
# $4 must be starttime
# the full userjob command in mythtv-setup should look like this: /path/to/this-script/mythtv-transcode-h264.sh "%DIR%/%FILE%" "%DIR%/%TITLE% - %PROGSTART%.mkv" "%CHANID%" "%STARTTIME%"

# a temporary working directory (must be writable by mythtv user)
TEMPDIR="/tmp"

# MySQL database login information (for mythconverg database)
DATABASEUSER="mythtv"
DATABASEPASSWORD=""

# MythTV Install Prefix (make sure this matches with the directory where MythTV is installed)
INSTALLPREFIX="/usr/bin"

DIRNAME=`dirname "$2"`
BASENAME=`echo "$2" | awk -F/ '{print $NF}' | sed 's/ /_/g' | sed 's/://g' | sed 's/?//g'`
BASENAME2=`echo "$1" | awk -F/ '{print $NF}'`

# go to correct working dir
cd $TEMPDIR

# lossless mpeg2-mpeg2 transcode
$INSTALLPREFIX/mythtranscode --chanid "$3" --starttime "$4" --mpeg2
echo "DELETE FROM recordedseek WHERE chanid='$3' AND starttime='$4';" > update-database.sql
mysql --user=$DATABASEUSER --password=$DATABASEPASSWORD mythconverg < update-database.sql
echo "DELETE FROM recordedmarkup WHERE chanid='$3' AND starttime='$4';" > update-database.sql
mysql --user=$DATABASEUSER --password=$DATABASEPASSWORD mythconverg < update-database.sql
echo "UPDATE recorded SET basename='$BASENAME2.tmp' WHERE chanid='$3' AND starttime='$4';" > update-database.sql
mysql --user=$DATABASEUSER --password=$DATABASEPASSWORD mythconverg < update-database.sql

X264OPTS="crf=20:me=umh:bframes=5:ref=9"
ffmpeg -y -deinterlace -i "$1.tmp" -acodec copy -vf scale='-1:720:interl=1' -vcodec libx264 -x264opts $X264OPTS "$DIRNAME/$BASENAME"

# flag commercials
mythcommflag -c "$3" -s "$4"

# update the database to point to the transcoded file and delete the original recorded show.
NEWFILESIZE=`du -b "$DIRNAME/$BASENAME" | cut -f1`
echo "UPDATE recorded SET basename='$BASENAME',filesize='$NEWFILESIZE',transcoded='1' WHERE chanid='$3' AND starttime='$4';" > update-database.sql
mysql --user=$DATABASEUSER --password=$DATABASEPASSWORD mythconverg < update-database.sql

# cleanup temp files
rm -f \
      x264_2pass.log* \
      update-database.sql \
      "$1" \
      "$1.tmp" \
      "$1*.png"