Muxer rtp [RTP output]:
    Default video codec: mpeg4.
    Default audio codec: pcm_mulaw.
RTP muxer AVOptions:
-rtpflags          <flags>      E..... RTP muxer flags
   latm                         E..... Use MP4A-LATM packetization instead of MPEG4-GENERIC for AAC
   rfc2190                      E..... Use RFC 2190 packetization instead of RFC 4629 for H.263
   skip_rtcp                    E..... Don't send RTCP sender reports
   h264_mode0                   E..... Use mode 0 for H264 in RTP
-payload_type      <int>        E..... Specify RTP payload type (from -1 to 127)
-ssrc              <int>        E..... Stream identifier (from INT_MIN to INT_MAX)
-cname             <string>     E..... CNAME to include in RTCP SR packets
-seq               <int>        E..... Starting sequence number (from -1 to 65535)

