[streaming] miniSAP

[Marshall Eubanks]

Dear Remi;

On Jun 29, 2008, at 5:02 AM, Rémi Denis-Courmont wrote:

> Le samedi 28 juin 2008 20:34:33 Marshall Eubanks, vous avez écrit :
>> We have been having a lot of problems recently with this program
>> blasting out SAP messages (up to 300 Mbps !), which cause multicast
>> problems.
>
> Yeah, so basically... minisap does not implement any bandiwdth  
> measurement at
> the moment. Congestion control is as brain-dead as sending a packet  
> every
> total delay divided by total number of _local_ announces.
>
>> Is there any possibility that this program could be changed to rate
>> limit it to < 1 Mbps or some other reasonable level ?
>
> minisap should measure the incoming SAP traffic, much like the VLC  
> built-in
> SAP sender does. However the official SAP RFC limit (4kbps) sounds  
> very low.
>
> That being noted, the default delay is 5 seconds, so that users wait  
> no more
> than 5 seconds to get the full channels lists. If there are so many  
> announces
> that you currently receive 300 Mbps of them on a single multicast  
> group, it
> would mean there are the order of a million different announces.  
> This seems
> unlikely high. I would suppose there is some buggy sender somewhere  
> that
> sends way too fast, such as an out-of-date version (< 0.3.4) of  
> miniSAP.

I will gather information about this and report back.

Regards
Marshall

>
>
> -- 
> Rémi Denis-Courmont
> http://www.remlab.net/