#! /bin/sh # Asterisk voicemail attachment conversion script # Revision history : # 22/11/2010 - V1.0 - Creation by N. Bernaerts # 07/02/2012 - V1.1 - Add handling of mails without attachment (thanks to Paul Thompson) # 01/05/2012 - V1.2 - Use mktemp, pushd & popd # 08/05/2012 - V1.3 - Change mp3 compression to CBR to solve some smartphone compatibility (thanks to Luca Mancino) # 01/08/2012 - V1.4 - Add PATH definition to avoid any problem (thanks to Christopher Wolff) # 01/12/2012 - V1.5 - Fixed extension case. Made sox conversion (jka) # set PATH # dependencies: sudo apt-get install dos2unix lame sendmail sox PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" # save the current directory pushd . # create a temporary directory and cd to it TMPDIR=$(mktemp -d) cd $TMPDIR # dump the stream to a temporary file cat >> stream.org # get the boundary BOUNDARY=`grep "boundary=" stream.org | cut -d'"' -f 2` # cut the file into parts # stream.part - header before the boundary # stream.part1 - header after the bounday # stream.part2 - body of the message # stream.part3 - attachment in base64 (WAV file) # stream.part4 - footer of the message awk '/'$BOUNDARY'/{i++}{print > "stream.part"i}' stream.org # if mail is having no audio attachment (plain text) PLAINTEXT=`cat stream.part1 | grep 'plain'` if [ "$PLAINTEXT" != "" ] then # prepare to send the original stream cat stream.org > stream.new # else, if mail is having audio attachment else # cut the attachment into parts # stream.part3.head - header of attachment # stream.part3.wav.base64 - wav file of attachment (encoded base64) sed '7,$d' stream.part3 > stream.part3.wav.head sed '1,6d' stream.part3 > stream.part3.wav.base64 # convert the base64 file to a wav file dos2unix -o stream.part3.wav.base64 base64 -di stream.part3.wav.base64 > stream.part3.WAV # jka: Convert GSM encoded wav to Microsoft PCM sox stream.part3.WAV -e signed-integer stream.part3.wav # convert wav file to mp3 file # -b 24 is using CBR, giving better compatibility on smartphones (you can use -b 32 to increase quality) # -V 2 is using VBR, a good compromise between quality and size for voice audio files lame -m m -b 24 stream.part3.wav stream.part3.mp3 # convert back mp3 to base64 file base64 stream.part3.mp3 > stream.part3.mp3.base64 # generate the new mp3 attachment header # change Type: audio/x-wav to Type: audio/mpeg # change name="msg----.wav" to name="msg----.mp3" cat stream.part3.wav.head | sed 's/x-wav/mpeg/g' | sed 's/x-WAV/mpeg/g' | sed 's/\.wav/\.mp3/g' | sed 's/\.WAV/\.mp3/g' > stream.part3.mp3.head # generate first part of mail body, converting it to LF only mv stream.part stream.new cat stream.part1 >> stream.new cat stream.part2 >> stream.new cat stream.part3.mp3.head >> stream.new dos2unix -o stream.new # append base64 mp3 to mail body, keeping CRLF unix2dos -o stream.part3.mp3.base64 cat stream.part3.mp3.base64 >> stream.new # append end of mail body, converting it to LF only echo "" >> stream.tmp echo "" >> stream.tmp cat stream.part4 >> stream.tmp dos2unix -o stream.tmp cat stream.tmp >> stream.new fi # send the mail thru sendmail cat stream.new | sendmail -t # go back to original directory popd # remove all temporary files and temporary directory rm -Rf $TMPDIR