maemo.org - Talk - View Single Post - [Implemented] Call recording for N900

iKneaDough	2009-12-25 , 18:11
Posts: 81 \| Thanked: 115 times \| Joined on Jan 2008	#41

Happy Holidays, everyone!

Here is my Holiday gift: A method for recording calls from the device!

note: it will require command line tinkering.

I got the idea and most of the information thanks to the blog link which dalonso posted here.

First you will need to get the pulseaudio-utils package either from here , or you can enable the tools repository and run

Code:

apt-get install pulseaudio-utils

there is a link to a single-click install file to add the tools repo here .

The pulseaudio-utils package provides two apps which I use in the scripts: 'parec' to record raw audio streams, and 'pacat' to play back raw audio streams.

The streams involved are: 'sink.hw0.monitor' for incoming sounds and 'source.hw0' for outgoing sounds when using the phone handset, and 'sink.hw1.monitor' for incoming and 'source.hw0' for outgoing when using a bluetooth headset.

In my home directory I created a few simple scripts for recording

for recording while using the handset, I have a script 'simpleRec.sh':

Code:

NOW=`date +%F-%H-%M-%S` 
echo $NOW > simpleDateTime
parec -d "sink.hw0.monitor" > MyDocs/tmp/$NOW.pulse.in.raw &
parec -d "source.hw0" > MyDocs/tmp/$NOW.pulse.out.raw

for recording while using bluetooth, I have a script 'simpleBtRec.sh':

Code:

NOW=`date +%F-%H-%M-%S` 
echo $NOW > simpleDateTime
parec -d "sink.hw1.monitor" > MyDocs/tmp/$NOW.pulse.in.raw &
parec -d "source.hw1" > MyDocs/tmp/$NOW.pulse.out.raw

To play back the most recent recorded call 'simpleLastPlay.sh' :

Code:

LAST=`cat simpleDateTime`
pacat MyDocs/tmp/$LAST.pulse.in.raw &
pacat -v MyDocs/tmp/$LAST.pulse.out.raw

To play back an older call using a unique date or time 'simplePlay.sh' :

Code:

pacat MyDocs/tmp/*$1*pulse.in.raw &
pacat -v MyDocs/tmp/*$1*pulse.out.raw

for example if you know you recorded a call on Dec 1 at 12:00 am, you could run ' ./simplePlay.sh 12-01-00-00 ' or any part of the date or time that you can remember, as long as it is unique.

To stop recording or playback just press ctrl+c.

Another script I made to stop any recording or playback if you can't get back to its original terminal window 'simpleStop.sh' :

Code:

killall parec
killall pacat

Final note: Please use it only where it is legal to do so, and please do not use it for any nefarious purpose. Enjoy!

The Following 28 Users Say Thank You to iKneaDough For This Useful Post:
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