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CUBEMAP(1) General Commands Manual CUBEMAP(1)


cubemap - scalable video reflector, designed to be used with VLC


cubemap [options] [FILE]


cubemap is a high-performance, high-availability video reflector, specifically made for use with VLC.

High-performance, through a design with multiple worker threads, epoll and sendfile (yes, sendfile); a 2GHz quadcore can saturate 10 gigabit Ethernet, given a modern kernel, a modern NIC and the right kernel tuning.
High-availability. You can change any part of the configuration (and even upgrade to a newer version of Cubemap) by changing cubemap.config and sending a SIGHUP; all clients will continue as if nothing had happened (unless you delete the stream they are watching, of course). Cubemap also survives the encoder dying and reconnecting.
Support for setting max pacing rate through the fq packet scheduler (depends on Linux 3.13 or newer).
Reflects anything VLC can reflect over HTTP, even the muxes VLC has problems reflecting itself (in particular, FLV).
Multicast support, both for sending and receiving (supports only protocols that can go over UDP, e.g. MPEG-TS). Supports both ASM and SSM.
IPv4 support. Yes, Cubemap even supports (some) legacy protocols.


tests the config and exits
configuration file (defaults to cubemap.config in the current directory)


cubemap was written by Steinar H. Gunderson <>.


cubemap is licensed under the GNU General Public License, version 2.



April 27, 2014