Found the problem. I was missing an app called "Lame"
- run command apt install Lame
- go to Settings>Voicemail Admin>Email Config> and change Mail Command to /usr/local/sbin/sendmailmp3
- rm /usr/local/sbin/sendmailmp3 - to remove existing sendmailmp3 file in /usr/local/sbin
- nano /usr/local/sbin/sendmailmp3 - add the following to this file:
#! /bin/sh
# Asterisk voicemail attachment conversion script, including voice recognition
# Use Voice Recognition Engine provided by IBM Bluemix Sppech-to-Text API
# 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)
# 01/06/2013 - V1.5 - Improved call quality of MP3
# 10/11/2014 - V1.6 - TB Sampson fix for iPhone playback too:
http://nerd.bz/1vTN3Hq
# 12/03/2017 - V2.3 - modified for use with IBM Bluemix Speech-to-Text API (thanks to Jason Klein and Ward Mundy & Associates LLC)
# 01/17/2018 - V2.4 - added "echo -e" for proper newline treatment in messages (thanks Bill Simon)
# Special thanks:
https://jrklein.com/2015/08/17/asterisk-voicemail-transcription-via-ibm-bluemix-speech-to-text-api/
# set credentials for IBM Bluemix Speech-to-Text API
# Obtain Bluemix credentials here:
https://www.ibm.com/watson/developercloud/doc/common/getting-started-credentials.html
# 1. Create Bluemix account here:
https://console.ng.bluemix.net/registration/?target=/catalog/?category=watson
# 2, Confirm registration by replying to email
# 3. Login to Bluemix:
https://console.ng.bluemix.net/login?state=/catalog/?category=watson
# 4. Agree to T&C, name your organization, and name your space (STT)
# 5. Choose Watson Speech to Text service and click Create
# 6. When Speech to Text-kb opens, click Service Credentials tab
# 7. In Actions column, click View Credentials and copy your username and password
# 8. Insert deciphered Bluemix API username and password below:
# 9. Logout by clicking on image icon in upper right corner of dialog window
API_USERNAME="hidden"
API_PASSWORD="hidden"
# set PATH
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 $TMPDIR
# dump the stream to a temporary file
cat >> stream.org
# get the boundary
BOUNDARY=`grep "boundary=" stream.org | cut -d'"' -f 2`
# cut the file into parts
# stream.part - header before the boundary
# stream.part1 - header after the boundary
# stream.part2 - body of the message
# stream.part3 - attachment in base64 (WAV file)
# stream.part4 - footer of the message
awk '/'$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
# 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 64 stream.part3.wav stream.part3.mp3
# TB Sampson mod for iPhone AND Android playback support
lame --abr 24 -mm -h -c --resample 22.050 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"
sed 's/x-wav/mpeg/g' stream.part3.wav.head | sed 's/.wav/.mp3/g' > stream.part3.mp3.head
CURL_OPTS=""
#API_USERNAME="XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX"
#API_PASSWORD="XXXXXXXXXXXX"
# Send WAV to Watson Speech to Text API. Must use "Narrowband" (aka 8k) model since WAV is 8k sample.
curl -s $CURL_OPTS -k -u $API_USERNAME:$API_PASSWORD -X POST \
--limit-rate 40000 \
--header "Content-Type: audio/wav" \
--data-binary @stream.part3.wav \
"
https://stream.watsonplatform.net/s...e?continuous=true&model=en-US_NarrowbandModel" 1>audio.txt
# Extract transcript results from JSON response
TRANSCRIPT=`cat audio.txt | grep transcript | sed 's#^.*"transcript": "##g' | sed 's# "$##g'`
# 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
echo -e "\r\n\r\n Message contents: $TRANSCRIPT" >> 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
- chmod +x /usr/local/sbin/sendmailmp3
After that the script works great to convert the WAV to MP3 which also works great. I noticed the quality of the VM is the same but the size of the MP3 is about 1/10th of a WAV file.
Phone System 