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.

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 &lt;vragukumar(a)signalogic.com <mailto:vragukumar@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: 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. _______________________________________________ Kamailio (OpenSER) - Users mailing list Users(a)lists.kamailio.org <mailto:Users@lists.kamailio.org> http://lists.kamailio.org/cgi-bin/mailman/listinfo/users http://lists.openser-project.org/cgi-bin/mailman/listinfo/users -- Carsten Bock Schomburgstr. 80 22767 Hamburg Germany Mobile +49 179 2021244 Home +49 40 34927217 Fax +49 40 34927218 mailto:carsten@bock.info <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 would also like to mention that the rtpproxy recorded .rtp files were generated using the following command rtpproxy -l listen_ip_address -s udp:127.0.0.1:7722 -a -P -F -r record_directory_path -S spool_directory_path where -P indicates that files would be recorded in the pcap format. Thanks and Regards, Vikram. Vikram Ragukumar wrote: _______________________________________________ Kamailio (OpenSER) - Users mailing list Users(a)lists.kamailio.org http://lists.kamailio.org/cgi-bin/mailman/listinfo/users http://lists.openser-project.org/cgi-bin/mailman/listinfo/users