I have modified bfransen's script to output a 16-bit PCM wav file (for uncompressed audio that I can burn to CD-R). It's worked really well for me, but I recently ran into an issue that has me stumped. I was trying to dump the audio for an episode of Sesame Street so I could make an audio CD of a song my son likes. However, I'm getting a mix of the program audio plus a descriptive narration for the "visually impaired." I've tried adding audio bitstream filters (-absf) "dump_extra" and "remove_extra" as well as mapping (-map) different audio tracks to the output to wav, but I can't seem to shake the narration. I do not hear the narration as I watch the program in mythfrontend. Any ideas anyone?
[EDIT] I figured it out. I was not using the correct syntax for the -map option. When I ran the ffmpeg command by hand, I saw the error of my ways. If anyone needs to know, you should use -map like this -map 0.1:0 where 0.1 is the 1st audio track in the program and 0 is the audio track on the output file. If you run the ffmpeg command by hand, it will become more apparent. How can we make the logging more verbose so I would not need to run the command by hand?[/EDIT]
Code: #!/bin/sh
# convert recordings to wav audio only
# version 0.6
# usage:
# first parameter must be %DIR%/%FILE% of the recording
# second parameter must be the desired base name of the output
# third parameter must be %CHANID% if you set USECUTLIST=Y
# fourth parameter must be %STARTTIME% if you set USECUTLIST=Y
# In the mythtv setup screen invoke this script like this:
# MYTHTV User Job Command:
# /usr/local/bin/myth2wav "%DIR%/%FILE%" "%TITLE% - %SUBTITLE%" "%CHANID%" "%STARTTIME%"
# options:
USECUTLIST=Y #Y or N
# where the converted audio is stored
OUT_DIR=/myth/music
# create temp filename so multiple instances won't conflict
TMPNAME=toWAV-$$
TMPFILE=/myth/tmp/$TMPNAME.wav
TMPCUTFILE=/myth/tmp/$TMPNAME.mpg
FFINPUTFILE=$1
# log file location
LOGFILE=/var/log/mythtv/myth2wav.log
CDate="`date`"
echo "" >> $LOGFILE
echo $CDate >> $LOGFILE
echo "File to encode: $1 Name: $2" >> $LOGFILE
# start timer
beforetime="$(date +%s)"
# check if using cutlist
if [ $USECUTLIST = Y ];then
MYTHCOMMFRAMES=`mythcommflag --getcutlist -f $FFINPUTFILE | grep 'Cutlist:' | cut -d \ -f 2`
if [ -n "$MYTHCOMMFRAMES" ]; then
echo "Extracting Cutlist..." >> $LOGFILE
/usr/bin/nice -n19 /usr/bin/mythtranscode --chanid "$3" --starttime "$4" --outfile "$TMPCUTFILE" --mpeg2 --honorcutlist
FFINPUTFILE=$TMPCUTFILE
fi
fi
# run ffmpeg to do conversion
echo "Encoding..." >> $LOGFILE
/usr/bin/nice -n19 /usr/bin/ffmpeg -i $FFINPUTFILE -vn -acodec pcm_s16le -ar 44100 -ac 2 $TMPFILE
ERROR=$?
# make output filename unique
OUTPUTFILE=$OUT_DIR/$2.wav
i=1
while [ -e "$OUTPUTFILE" ]
do
OUTPUTFILE=$OUT_DIR/$2-$i.wav
i=`expr $i + 1`
done
# move temp file to output location
chown mythtv "$TMPFILE" && mv "$TMPFILE" "$OUTPUTFILE"
# stop timer
aftertime="$(date +%s)"
seconds="$(expr $aftertime - $beforetime)"
if [ $ERROR -eq 0 ]; then
echo "File Encoded Sucessfully: $OUTPUTFILE" >> $LOGFILE
hours=$((seconds / 3600))
seconds=$((seconds % 3600))
minutes=$((seconds / 60))
seconds=$((seconds % 60))
echo "Encoding Time: $hours hour(s) $minutes minute(s) $seconds second(s)" >> $LOGFILE
else
echo "ERROR: $ERROR" >> $LOGFILE
fi
# clean up left over files
unlink $TMPFILE 2> /dev/null
unlink $TMPCUTFILE 2> /dev/null
unlink $TMPCUTFILE.map 2> /dev/null
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sorry!