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The multicat package contains a set of tools designed to easily and efficiently manipulate multicast streams in general, and MPEG-2 Transport Streams. 1)


multicat can be installed with the Pakfire web interface or via the console:

 pakfire install multicat


There is no web interface for this Addon. To run this Addon open the client console or terminal and access the IPFire box via SSH.

To obtain a list of possible commands:

multicat -h

The output is similar to this:

[root@ipfire-rpi3bplus ~]# multicat -h
Usage: multicat [-i <RT priority>] [-t <ttl>] [-X] [-T <file name>] [-f] [-p <PCR PID>] [-s <chunks>] [-n <chunks>] [-k <start time>] [-d <duration>] [-a] [-r <file duration>] [-S <SSRC IP>] [-u] [-U] [-m <payload size>] [-R <RTP header size>] <input item> <output item>
    item format: <file path | device path | FIFO path | directory path | network host>
    host format: [<connect addr>[:<connect port>]][@[<bind addr][:<bind port>]]
    -X: also pass-through all packets to stdout
    -T: write an XML file with the current characteristics of transmission
    -f: output packets as fast as possible
    -p: overwrite or create RTP timestamps using PCR PID (MPEG-2/TS)
    -s: skip the first N chunks of payload [deprecated]
    -n: exit after playing N chunks of payload [deprecated]
    -k: start at the given position (in 27 MHz units, negative = from the end)
    -d: exit after definite time (in 27 MHz units)
    -a: append to existing destination file (risky)
    -r: in directory mode, rotate file after this duration (default: 97200000000 ticks = 1 hour)
    -S: overwrite or create RTP SSRC
    -u: source has no RTP header
    -U: destination has no RTP header
    -m: size of the payload chunk, excluding optional RTP header (default 1316)
    -R: size of the optional RTP header (default 12)

The current pakfire multicat release is version 2.0 and was released by the VideoLAN project team on 4 January 2012

Feel free to edit this wiki or post comments in the IPFire Forum.

addons/multicat/start.txt · Last modified: 2019/03/11 19:53 by Jon