Ticket #4527: mpg2avi

#!/bin/sh

#
# Replaces given mpeg2 recording with avi transcoded using xvid codec.
#
# The script automatically rebuilds the seek table and updates the myth database
# with the new filename.
#

MENCODER=/usr/local/bin/mencoder
MYSQL=/usr/bin/mysql
DBUSER=mythtv
DBPASS=mythtv
DBNAME=mythconverg

# error checking
if [ $# -ne 2 ]; then
        echo "Usage: $(basename $0) directory file.mpg" 1>&2
        echo "  directory - MythTV recordings storage directory" 1>&2
        echo "  file.mpg - MPEG recording file" 1>&2
        exit 1
fi

DIR=$1
FILE=$2

if [ ! -d $DIR ]; then
        echo "$(basename $0): Directory $DIR not found" 1>&2
        exit 1
fi

if ! echo $FILE | grep -q '.mpg'; then
        echo "$(basename $0): $FILE not recognized as an mpeg file (no .mpg extension)" 1>&2
        exit 1
fi

BASENAME=$(basename $FILE .mpg)
LOGFILE=${BASENAME}.log

cd $DIR

# transcode mpg to avi using xvid codec
/usr/bin/nice -n 17 $MENCODER -passlogfile $LOGFILE $FILE -o /dev/null -vf kerndeint,scale=720:576 -oac mp3lame -ovc xvid -xvidencopts pass=1 #:max_bframes=1:trellis:vhq=4:chroma_me:chroma_opt:hq_ac:bvhq=1
/usr/bin/nice -n 17 $MENCODER -passlogfile $LOGFILE $FILE -o ${BASENAME}.avi -vf kerndeint,scale=720:576 -oac mp3lame -ovc xvid -xvidencopts pass=2:bitrate=800 #:max_bframes=1:trellis:vhq=4:chroma_me:chroma_opt:hq_ac:bvhq=1

# remove xvid pass 1 log file
rm -f $LOGFILE 2> /dev/null

# Sanity check: verify avi file exists and has size greater than zero
if [ ! -s ${BASENAME}.avi ]; then
        echo "$(basename $0): Transcoding of file $FILE failed" 1>&2
        rm -f ${BASENAME}.avi 2> /dev/null
        exit 2
fi

# Modify myth database file info
FILEINFO="$(ls -l ${BASENAME}.avi)"
FILESIZE="$(echo $FILEINFO | awk '{print $5}')"
FILELASTMOD="$(echo $FILEINFO | awk '{print $6" "$7}')"

echo "UPDATE recorded SET lastmodified='${FILELASTMOD}',filesize='${FILESIZE}',basename='${BASENAME}.avi' WHERE basename='$FILE';" | $MYSQL -u$DBUSER -p$DBPASS --batch $DBNAME

# rebuild seek table for new avi file
nice -n 17 mythcommflag -f ${BASENAME}.avi --rebuild

# rename screenshot file
if [ -f ${FILE}.png ]; then
        cp ${FILE}.png ${BASENAME}.avi.png
fi

# remove original .mpg files
# rm -f $FILE
# rm -f ${FILE}.png