Block diagram
rtpdump is a format used by rtptools to record and replay rtp data from network capture.
This page hosts a formal specification of Rtpdump (rtptools) using Kaitai Struct. This specification can be automatically translated into a variety of programming languages to get a parsing library.
meta:
id: rtpdump
title: Rtpdump (rtptools)
file-extension:
- rtp
- rtpdump
license: Unlicense
imports:
- /network/rtp_packet
endian: be
doc: |
rtpdump is a format used by rtptools to record and replay
rtp data from network capture.
doc-ref: https://chromium.googlesource.com/external/webrtc/stable/talk/+/master/media/base/rtpdump.h
seq:
- id: file_header
type: header_t
- id: packets
type: packet_t
repeat: eos
types:
header_t:
seq:
- id: shebang
contents: '#!rtpplay1.0'
- id: space
contents: ' '
- id: ip
type: str
encoding: ascii
terminator: 0x2f # '/'
- id: port
type: str
encoding: ascii
terminator: 0x0a # '\n'
- id: start_sec
type: u4
doc: |
start of recording, the seconds part.
- id: start_usec
type: u4
doc: |
start of recording, the microseconds part.
- id: ip2
type: u4
doc: |
network source.
- id: port2
type: u2
doc: |
port.
- id: padding
type: u2
doc: |
2 bytes padding.
packet_t:
seq:
- id: length
type: u2
doc: |
packet length (including this header).
- id: len_body
type: u2
doc: |
payload length.
- id: packet_usec
type: u4
doc: |
timestamp of packet since the start.
- id: body
size: len_body
type: rtp_packet