220.127.116.11 Other Requirements
The following rules MUST be followed when packetizing an RTVideo frame:
§ The RTP sequence numbers MUST be continuous across video frames.
§ The first packet of a video frame MUST have the F (first packet flag) bit set to "1".
§ The last data packet of a video frame MUST have the L (last packet flag) bit set to "1".
§ The last packet of a video frame (either the data packet or the FEC metadata packet) MUST have the RTP M bit set to "1".
§ The PacketNumber, HiPN, LastPacketLength, HiLPL, DV and EndOffset fields for all FEC metadata packets (up to 31) MUST be set correctly. For each FEC packet, if the value of DV is "01", the FECPacketsNumber SHOULD<10> be set correctly.
§ The HiFC, FrameCounter, HiRFC, and RefFrameCounter fields MUST be set to the correct frame counter and the reference frame counter for the data packet and MUST be set to "0" for the FEC metadata packet.