rtp fill gap

[Morthred]

we are using your project to sniff sip/rtp packets on our network and save it as wav, sometimes there were about %20 packet loss when we look sequence number on rtp packet . we think that there is 2 way to fill gaps

1. put silence packet on missing
2. interpolation
   do you have any method or project or example about silence packet or interpolation
   Thanks