14 Jan
2010
14 Jan
'10
9:25 p.m.
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:
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.