Change emailed vmail from .wav to mp3

Owned by Former user (Deleted)
Last updated: Mar 17, 2014 by Former user (Deleted)
2 min read

Change voicemail from wav to MP3

 

With the release of sipXecs 46, there is now a small configuration change to make while logged into the system GUI

Follow the following instructions to make this change -

Go to System/Servers/Voicemail

Change the drop down that defaults to WAV to MP3 

Press OKAY to save

 

All information below is deprecated and no longer necessary to enable MP3 file delivery within sipXecs 4 6 and above

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A typical voicemail in wav format can be 1mb or larger. Even a short voicemail can be 192K. If you are sending this to your cell phone, it can start to use up your data plan, and take longer to download.

This hack will translate your outbound wav file into an mp3. Maybe, works here, never had a problem, ymmv*

You will see savings on the order of 70%. That 192K wav file is now a 40K mp3. And, mp3's are directly supported on most cell phones, inline without needing to load players.

Quick Start for the impatient: download postfix, lame, mutt, ripmime and system-switch-mail. Hack main.cf to do a redirect, and add my script. Seems to work. Note: this does NOT translate the web based voicemail to mp3.. just the emailed copy. Make backups, backup everything, just in case. No warranties, instructions void where taxed or prohibited by law.

We start by loading a different email server: postfix. I like it better than sendmail, we use it in our commercial email security devices, and, I don't know how to do this with sendmail. (If you are a sendmail expert, add your hacks, please)

yum repositories must be set up right, if they aren't, you can't do the downloads.

as root, do:

yum install postfix system-switch-mail lame mutt ripmime procmail

execute: system-switch-mail. select postfix (you can go back by running it again and selecting sendmail)

make sure sendmail is not running anymore: /etc/init.d/sendmail stop.
make sure sendmail doesn't start when booted
chkconfig --del sendmail (note: system-switch-mail might have done this for you already, I don't remember)

make sure postfix is running:
/etc/init.d/postfix start.

and runs when rebooted.
chkconfig --add postfix
chkconfig --level 2345 postfix on

now, the fun stuff:
Add account to do this:
adduser wav2mp3. home directory /home/wav2mp3. don't need/want a password.
mkdir /home/wav2mp3/bin /home/wav2mp3/Mail

get this file and put it into bin: (second attachment, convertwav.tgz. put in /tmp)

cd /home/wav2mp2/bin
tar -zxvf /tmp/convertwav.tgz ./
chmod a+x convertwav

need more magic: take email to wav2mp3 and make it run that script:
cd /home/wav2mp3
edit .forward and put this one line there EXACTLY (sends email to procmail, will execute .procmailrc)
"|IFS=' '&&p=/usr/bin/procmail&&test f $p&&exec $p -f||exit 75"

now, .procmailrc:
take the attached file, procmail.rc and rename it /home/wav2mp3/.procmailrc

chown -R wav2mp3:wav2mp3 /home/wav2mp3

Add config lines to postfix to redirect outbound email, internally:
echo '/^Content-Type: audio\/x-wav/ REDIRECT wav2mp3@localhost' > /etc/postfix/header_checks
postconf -e header_checks=pcre:/etc/postfix/header_checks

restart postfix.

postfix reload.

should work.. leave yourself a voicemail, see what happens.

  • ymmv: your mileage may vary. this worked on a sipx cent os iso for 4.04, upgraded to 4.2.0 with yum.
  • mp3 might be patented in and you might need to license it, depending on your use.
  • if anything ever breaks, restore.
  • if this doesn't work, figure out why, and edit the instructions.