multicat.1


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73

.TH Multicat "1" "August 23, 2010" "Multicat 1.0"
.SH NAME
multicat \- Multicast equivalent of Netcat
.SH SYNOPSIS
.B multicat
[\fI-i <RT priority>\fR] [\fI-t <ttl>\fR] [\fI-p <PCR PID>\fR] [\fI-s <chunks>\fR]
[\fI-n <chunks>\fR] [\fI-d <time>\fR] [\fI-a\fR] [\fI-S <SSRC IP>\fR] [\fI-u\fR]
[\fI-U\fR] [\fI-m <payload size>\fR] <input item> <output item>
.SH DESCRIPTION
Multicat is a 1 input/1 output application. Inputs and outputs can be network
streams (unicast and multicast), files, character devices or FIFOs. It is thought
to be a multicast equivalent of the popular netcat tool.

Multicat tries to rebuild the internal clock of the input stream; but it wants
to remain agnostic of what is transported, so in case of files the said clock
is stored to an auxiliary file (example.aux accompanies example.ts) while
recording. Other inputs are considered "live", and the input clock is simply
derived from the reception time of the packets.
.SH ITEMS
Item format \fB<file path | device path | FIFO path | network host>\fR
.TP
Host format \fB[<connect addr>[:<connect port>]][@[<bind addr][:<bind port>]]\fR
.SH OPTIONS
.B \-a
Append to existing destination file (risky)
.TP
\fB\-d\fR <time>
Exit after a definite time (in 27 MHz units)
.TP
\fB\-i\fR <RT priority>
Real time priority
.TP
.B \-h
Show summary of options
.TP
\fB\-m\fR <payload size>
Size of the payload chunk, excluding optional RTP header (default 1316)
.TP
\fR\-n\fR <chunks>
Exit after playing N chunks of payload
.TP
\fB\-p\fR <PCR PID>
PCR PID
.TP
\fB\-s\fR <chunks>
Skip the first N chunks of payload
.TP
\fB\-S\fR <SSRC IP>
Overwrite or create RTP SSRC
.TP
\fB\-t\fR <ttl>
TTL of the packets send by multicat
.TP
.B \-u
Source has no RTP header
.TP
.B \-U
Destination has no RTP header
.SH SEE ALSO
.BR aggregartp (1),
.BR desaggregartp (1).
.BR ingests (1).
.BR offsets (1).
.br
Read the README file for more information about the configuration of multicat.
.SH AUTHOR
multicat was written by Christophe Massiot.
.SH LICENCE
This program is free software; you can redistribute it and/or modify it under the terms of
version 2 of the GNU General Public License as published by the Free Software Foundation.
.PP
This manual page was written by Rémi Duraffort <ivoire at videolan dot org>,
for the Debian project (and may be used by others).