AAC:
m=audio 4002 RTP/AVP 97
a=rtpmap:97 MPEG4-GENERIC/44100/2
a=fmtp:97 profile-level-id=1;mode=AAC-hbr;sizelength=13;indexlength=3;indexdeltalength=3; config=1210
c=IN IP4 10.10.40.41
mpga:
m=audio 4002 RTP/AVP 14
b=AS:192
c=IN IP4 10.10.40.41