[vlc] Re: H263 over RTP

[Derk-Jan Hartman]

On 26-feb-2007, at 20:45, Ross Finlayson wrote:
>> Also noticed this in the vlc log:
>>
>> sap warning: unable to parse c field (1)
>
> That's your problem right there.  Your "c=" line
> 	c=224.0.0.1
> should instead be something like
> 	c=IN IP4 224.42.43.44/255
> (Read the SDP specification!)
>
> Note also that you shouldn't use multicast addresses in the range  
> 224.0.*.*.  - they're reserved for use by routers.  Instead, use  
> one like 224.42.43.44 - e.g., my example above.

Actually even better would be:
239.192.0.0/14 (organization local scope)
239.255.0.0/16 (local scope)

The ranges are actually even a little less wide then that, but no one  
ever remembers and no one ever really cares in this case. :D



The 224. upto 238.255.255.255 range is a global scope (internet  
scope) and you should really avoid using that whenever possible. It's  
also highly administered, with a lot of reserved subranges in it.

224.0.0.0/24 routers/switches/zeroconf (traffic limited to LAN) (STAY  
AWAY, USING THIS CAN MESS UP YOUR NETWORK)
224.1.0.0/16 applications and protocols and companies
224.2.0.0/16 SDP/SAP (you can use 224.2.128.0-224.2.255.255 [SAP  
dynamic assignments])
224.0.0.0/8 (the rest of the block is a total mess, in general just  
stay away from it)
232.0.0.0/8 SSM multicast
233.0.0.0/8 IANA GLOP (AS number) administered space (reserved areas  
for ISPs)

DJ

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