14 Jan
2010
14 Jan
'10
9:54 p.m.
Hi,
1)
Did you try to post your problem on the RTP-Proxy-Users' List?
http://lists.rtpproxy.org/mailman/listinfo/users
Probably, you might get more help there....
2)
Did you try to extract the Audio with Wireshark? If Wireshark can play the
Audio (and i assume it is correctly implemented), then the recorded stream
as such is correct. Then you can check, if the bug lies in rtpbreak (or as a
next step: sox). Just to limit the possible sources of the problem...
Carsten
2010/1/14 Vikram Ragukumar <vragukumar(a)signalogic.com>
Hello,
An update,
I tried using sox to convert the two .raw files into 2 mono channel wave
files. The command line i used is below :
sox -r 8k -b -c 1 -u rtp.0.0.raw rtp0.wav
sox -r 8k -b -c 1 -u rtp.1.0.raw rtp1.wav
When i listen to the .wav files, i hear speech but it is buried in a lot of
noise. During blank periods (periods of no speech) there is a constant
volume high pitched noise. Also during periods of speech, there seems to be
bursts of noise in the background.
The other engineer i work with and i, think that it is possibly because
non-speech data is being interpreted as speech.
What switch options should i change while invoking sox from the command
line to get rid of the noise?
Thanks and Regards,
Vikram.
Vikram Ragukumar wrote:
--
Carsten Bock
Schomburgstr. 80
22767 Hamburg
Germany
Mobile +49 179 2021244
Home +49 40 34927217
Fax +49 40 34927218
mailto:carsten@bock.info
Mike Ditka <http://www.brainyquote.com/quotes/authors/m/mike_ditka.html> -
"If God had wanted man to play soccer, he wouldn't have given us arms."
Hello,
I used Kamailio+rtpproxy to record a session and rtpproxy outputs the
following files
long_file_name.a.rtp, long_file_name.a.rtcp, long_file_name.o.rtp,
long_file_name.o.rtcp
http://www.rtpproxy.org/wiki/RTPproxy/FAQ
From the Rtpproxy FAQ above, i tried to extract the audio using rtpbreak
and sox.
rtpbreak -W -r long_file_name.a.rtp
rtpbreak -W -r long_file_name.o.rtp
The above commands generate rtp.0.0.raw, rtp.1.0.raw.
Then when i run sox using
sox --combine merge -r 8k -A rtp.0.0.raw -r 8k -A rtp.1.0.raw -t wavpcm -s
out.wav i get the following errors :
sox: invalid option -- -
sox: -c must be given a number
Is there a switch/anything else that i am missing ?
Thanks in advance,
Regards,
Vikram.
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