[Kamailio-Users] Converting rtpproxy recorded .rtp file to .wav file
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.
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.
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@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@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 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."
Carsten, Thank you for your reply. Carsten Bock wrote:
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....
Yes i have posted on rtpproxy users list.
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...
I have not tried Wireshark to extract the audio. I have been using rtpbreak to generate the .raw file. Subsequent to which i use sox to convert the .raw to a .wav file. By importing the the .raw file into Hypersignal software, we found that the .raw file doesnt entirely seem to be composed of speech samples, so there could be a problem at the rtpbreak step. This is the command i used to convert rtpproxy's capture file to .raw format rtpbreak -W -r capturefile.rtp Am i missing something here ? Thanks and Regards, Vikram.
Carsten
2010/1/14 Vikram Ragukumar <vragukumar@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@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:
Carsten,
Thank you for your reply.
Carsten Bock wrote:
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....
Yes i have posted on rtpproxy users list.
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...
I have not tried Wireshark to extract the audio. I have been using rtpbreak to generate the .raw file. Subsequent to which i use sox to convert the .raw to a .wav file. By importing the the .raw file into Hypersignal software, we found that the .raw file doesnt entirely seem to be composed of speech samples, so there could be a problem at the rtpbreak step.
This is the command i used to convert rtpproxy's capture file to .raw format
rtpbreak -W -r capturefile.rtp
Am i missing something here ?
Thanks and Regards, Vikram.
Carsten
2010/1/14 Vikram Ragukumar <vragukumar@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@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."
_______________________________________________ Kamailio (OpenSER) - Users mailing list Users@lists.kamailio.org http://lists.kamailio.org/cgi-bin/mailman/listinfo/users http://lists.openser-project.org/cgi-bin/mailman/listinfo/users
I ran into a similar issue and while searching for a solution, I found a few threads describing the same problem but no solution.It turns out that the sox command must have the proper arguments in order to properly decode raw files.Feeding sox with an u-law stream and asking to be decoded as an a-law stream will create garbled sound. I posted a more descriptive procedure on how to extract audio from rtpproxy pcap files here:http://voipembedded.wordpress.com/extracting-audio-from-calls-recorded-with-... Regards,Ovidiu Sas On Thu, Jan 14, 2010 at 5:37 PM, Vikram Ragukumar <vragukumar@signalogic.com> wrote:
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:
Carsten,
Thank you for your reply.
Carsten Bock wrote:
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....
Yes i have posted on rtpproxy users list.
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...
I have not tried Wireshark to extract the audio. I have been using rtpbreak to generate the .raw file. Subsequent to which i use sox to convert the .raw to a .wav file. By importing the the .raw file into Hypersignal software, we found that the .raw file doesnt entirely seem to be composed of speech samples, so there could be a problem at the rtpbreak step.
This is the command i used to convert rtpproxy's capture file to .raw format
rtpbreak -W -r capturefile.rtp
Am i missing something here ?
Thanks and Regards, Vikram.
Carsten
2010/1/14 Vikram Ragukumar <vragukumar@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@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."
_______________________________________________ Kamailio (OpenSER) - Users mailing list Users@lists.kamailio.org http://lists.kamailio.org/cgi-bin/mailman/listinfo/users http://lists.openser-project.org/cgi-bin/mailman/listinfo/users
_______________________________________________ Kamailio (OpenSER) - Users mailing list Users@lists.kamailio.org http://lists.kamailio.org/cgi-bin/mailman/listinfo/users http://lists.openser-project.org/cgi-bin/mailman/listinfo/users
-- VoIP Embedded, Inc. http://www.voipembedded.com
participants (3)
-
Carsten Bock -
Ovidiu Sas -
Vikram Ragukumar