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Decode Maemo Recorder .libc Using Audacity
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johndoe32102002
2008-11-21 , 03:53
Posts: 64 | Thanked: 19 times | Joined on Feb 2008
#
1
I was unable to find instructions on the internet on how to recover, or decode, .libc-generated files from Maemo Recorder to another computer.
Thanks to Rich at
http://houseofmabel.com/
for the instructions via email.
Instructions:
1.) Download the .exe ilbc script created by Jeffery (from
http://www.iconbar.com/forums/viewth...threadid=10868
) at
http://www.iconbar.com/forums/attach...10868/ilbc.zip
(or attached in to this thread in a .zip).
2.) Run the .exe in command line or terminal using wine.
Windows Users: Start --> Run --> type cmd --> cd <folder with input file> --> type ilbctest.exe 30 -decode input_file.ilbc output_file.raw
Linux Users: Terminal --> cd <folder with input file> --> wine ilbctest.exe 30 -decode input_file.ilbc output_file.raw
If you do not know what user you are, you are a Windows User.
The output should look similar to below:
*---------------------------------------------------*
* *
* iLBC test program *
* *
* *
*---------------------------------------------------*
Mode : 30 ms
Input file : -decode
Encoded file : input_file.ilbc
Output file : output_file.raw
--- Decoding block 57636 ---
Length of speech file: 1729.1 s
Packet loss : 0.0%
Time to run iLBC : 31.8 s (1.8 % of realtime)
3.) The script should have provided an output_file.raw in the directory you "cd"ed (changed to). Ensure it is there, or redo steps (1) and (2).
4.) Install audacity from
http://audacity.sourceforge.net/download/
5.) Open Audacity --> File --> Import --> Raw Data
6.) In Audacity still, find the file output_file.raw in the directory you "cd"ed (changed to) --> Press the Open button.
7) This step is where Rich and I differed in instructions.
Rich used the following settings (also see in the .zip attached to this forum):
Import Raw Data:
Signed 16 bit PCM
***Big-Endian***
1 Channel (Mono)
Start Offset: 0 bytes
Amount to import: 100%
Sample rate: 8000 Hz
I used the following settings, successfully (also see in the .zip attached to this forum):
Import Raw Data:
Signed 16 bit PCM
**Little-Endian***
1 Channel (Mono)
Start Offset: 0 bytes
Amount to import: 100%
Sample rate: 8000 Hz
Press the Import button.
8.) Hopefully when you play the file using one of the two above methods, the data will sound intact. If not, please report here. If so, please continue to save the file.
9.) File --> Export --> Save (Default is .wav, which is large, but works on all systems)
Hope this guide helped.
Regards,
John
Attached Files
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