The goal of Xplico is extract from an internet traffic capture the applications data contained. For example, from a pcap file Xplico extracts each email (POP, IMAP, and SMTP protocols), all HTTP contents, each VoIP call (SIP), and so on. Xplico isn’t a network protocol analyzer. Xplico is an open source Network Forensic Analysis Tool (NFAT). Xplico is released under the GNU General Public License.
Xplico has a new tool called pcap2wav that decode RTP stream. pcap2wav has a web interface and decodes the audio G711ulaw, G711alaw, G722, G729, G723, G726 and RTAudio (x-msrta) .
Info and free use: http://pcap2wav.xplico.org/
Now Xplico has a new tool named pcap2wav and it is able (the only) to decode RTaudio (msrta) on Linux.