[Kamailio-Users] Converting rtpproxy recorded .rtp file to .wav file

[Vikram Ragukumar]

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.