Hi,<br><br>1)<br>Did you try to post your problem on the RTP-Proxy-Users&#39; List?<br><a href="http://lists.rtpproxy.org/mailman/listinfo/users">http://lists.rtpproxy.org/mailman/listinfo/users</a><br>Probably, you might get more help there....<br>

2)<br>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...<br>

<br>Carsten<br><br><div class="gmail_quote">2010/1/14 Vikram Ragukumar <span dir="ltr">&lt;<a href="mailto:vragukumar@signalogic.com">vragukumar@signalogic.com</a>&gt;</span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">

Hello,<br>
<br>
An update,<br>
<br>
I tried using sox to convert the two .raw files into 2 mono channel wave files. The command line i used is below :<br>
sox -r 8k -b -c 1 -u rtp.0.0.raw rtp0.wav<br>
sox -r 8k -b -c 1 -u rtp.1.0.raw rtp1.wav<br>
<br>
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.<br>


<br>
The other engineer i work with and i, think that it is possibly because non-speech data is being interpreted as speech.<br>
<br>
What switch options should i change while invoking sox from the command line to get rid of the noise?<br>
<br>
Thanks and Regards,<br>
Vikram.<br>
<br>
<br>
<br>
Vikram Ragukumar wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hello,<br>
<br>
I used Kamailio+rtpproxy to record a session and rtpproxy outputs the following files<br>
<br>
long_file_name.a.rtp, long_file_name.a.rtcp, long_file_name.o.rtp, long_file_name.o.rtcp<br>
<br>
<a href="http://www.rtpproxy.org/wiki/RTPproxy/FAQ" target="_blank">http://www.rtpproxy.org/wiki/RTPproxy/FAQ</a><br>
 From the Rtpproxy FAQ above, i tried to extract the audio using rtpbreak and sox.<br>
<br>
rtpbreak -W -r long_file_name.a.rtp<br>
rtpbreak -W -r long_file_name.o.rtp<br>
<br>
The above commands generate rtp.0.0.raw, rtp.1.0.raw.<br>
<br>
Then when i run sox using<br>
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 :<br>
<br>
sox: invalid option -- -<br>
sox: -c must be given a number<br>
<br>
Is there a switch/anything else that i am missing ?<br>
<br>
Thanks in advance,<br>
Regards,<br>
Vikram.<br>
<br>
<br>
    <br>
</blockquote>
<br>
<br>
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</blockquote></div><br><br clear="all"><br>-- <br>Carsten Bock<br>Schomburgstr. 80<br>22767 Hamburg<br>Germany<br><br>Mobile +49 179 2021244<br>Home +49 40 34927217<br>Fax +49 40 34927218<br>mailto:<a href="mailto:carsten@bock.info">carsten@bock.info</a><br>

<br><a href="http://www.brainyquote.com/quotes/authors/m/mike_ditka.html" target="_blank">Mike Ditka</a>  - &quot;If God had wanted man to play soccer, he wouldn&#39;t have given us arms.&quot;