HELP: UDP broadcast vlc stream weirdness!

Hi I'm trying using vlc to broadcast UDP stream within a LAN, Making it like a TV channel.

I used command line to launch VLC which then vlc is 开发者_C百科ok to run =

cvlc --repeat filename.avi --sout '#standard{access=udp,mux=ts,dst=239.255.12.42:8001}

problem is it works on some network, and I have problem receiving it on a network without router!

Question: what is some magical about the address "239.255.x.x" ? what network hardware is require for UDP broadcast besides switches and cables? Does wireless can accept UDP broadcast?

Thanks for your answers!

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The 239.255.x.x addresses are part of the multicast address space, ranging from 224.0.0.0 to 239.255.255.255 (and there are some specific-use areas in there).

You've correctly noted that it doesn't work without a router. This is because the basic IP stack still wants to know how to route those addresses to determine which interface to send them on. You can either add a static route for multicast (that address or all multicast addresses), or put in a default gateway.

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Read about using command line options here.

More specific answer:

standard (alias std)

Sends a stream.

Options:

access: how to send: file, udp, rtp, http.

mux: which muxer (ie, which format) will be used. It can be one of avi (for AVI format) ogg (for OGG format) ps (for MPEG2-PS format) ts (for MPEG2-TS format).

url: if you use the file access, it will be the location where to store the stream; if you use another access, it will be the unicast or multicast IP address where you want to stream.

sap: if you use the udp or rtp accesses, use this option to announce your stream, using SAP/SDP.

name! This option contains the name under which you want to announce the program.

slp: like sap, but use the SLP protocol. You need to have libslp on your system.

sap_ipv: if you use the sap option, use this option to specify if you want to send the SAP announces in IPv4 or IPv6. The value of this option is 4 or 6.