RTP (`rtp`)

Reached from

Lower layer	Selector	Value
`udp`	`dst_port` / `src_port`	5004 (0x138c)

Field	Type	Default	Auto	Description
`version`	`uint(2)`	`2`		RTP version (2).
`padding`	`uint(1)`	`0`		P bit: padding octets at the end of the payload (the last one is their count, Manual).
`x`	`uint(1)`		Number of items of `header_extension`	X bit: a header extension follows the CSRC list (Auto).
`cc`	`uint(4)`		Number of items of `csrc`	CSRC count (Auto).
`marker`	`uint(1)`	`0`		Marker bit (profile-defined, e.g. the start of a talkspurt).
`payload_type`	`enum(7)`	`0` (pcmu)		Payload type (0 PCMU, 8 PCMA, 9 G.722, 18 G.729, 96-127 dynamic).
`sequence_number`	`uint(16)`	`1`		Sequence number, incremented by one per RTP packet.
`timestamp`	`uint(32)`	`0`		Timestamp: sampling instant of the first payload octet.
`ssrc`	`uint(32)`	`305419896`		Synchronization source identifier.
`csrc`	`list<uint(32)>` — `cc` items	`[]`		Contributing source identifiers (up to 15).
`header_extension`	`list<struct>` — `x` items	`[]`		Header extension: profile-defined 16 bits (0xBEDE: RFC 8285 one-byte elements), the length in 32-bit words (Auto) and the extension words.