Opened 6 years ago

Closed 2 years ago

#4799 closed enhancement (fixed)

audio codec conversion codec 0x0135 sipro lab kelvin

Reported by: sdevaraj Owned by:
Priority: wish Component: avcodec
Version: git-master Keywords: g729
Cc: Blocked By:
Blocking: Reproduced by developer: yes
Analyzed by developer: no


I'm trying to convert codec 0x0135 sipro lab kelvin to mp3. I think ffmpeg currently doesn't support this conversion.

commandline - ffmpeg -i sipro_codec_wav.wav test.mp3 - sample wav

Attachments (1)

ffmpeg_wavfile_sample.wav (30.1 KB ) - added by Carl Eugen Hoyos 6 years ago.

Download all attachments as: .zip

Change History (7)

by Carl Eugen Hoyos, 6 years ago

Attachment: ffmpeg_wavfile_sample.wav added

comment:1 by Carl Eugen Hoyos, 6 years ago

Keywords: sipr added
Reproduced by developer: set
Status: newopen

My guess is that this is 8.5kbit 8kHz stereo sipr.

comment:2 by compn, 6 years ago

Thank you for the sample, if it's not in mplayer I will try to add it.

Did you upload the codec dll yet?

comment:3 by compn, 6 years ago

sorry, i cannot find the dll file for this codec. which means i cant find a solution to convert your sample file.

try asking on for a codec to decode your file.

good luck!!!

if you have any information at all on the name of the program used to make or record these calls. or maybe the name of the hardware used? any information like that will help me to locate the codec.

you can also try contacting cisco and and sipro. maybe one of them can help...

comment:5 by compn, 6 years ago

these files might have been recorded by Qfiniti Workforce Management call system software suite for call centers.

but i dont know what version would be using this kelvin codec. any help locating it would be appreciated.

comment:6 by Carl Eugen Hoyos, 2 years ago

Keywords: g729 added; sipr removed
Resolution: fixed
Status: openclosed
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