[mythtv-users] Bandwidth requirements MPEG2

Matt Vollmar matt at vollmars.com
Fri Dec 3 14:17:08 UTC 2004


Joel Merrick wrote:

>You have to remember that with 802.11b, you may be still not connect at
>11Mbits.. this is because there may not be the adequate signal strength
>so the wireless link will drop in speed until a suitable medium is
>achieved.
>
>Many people do not realise this when they use wireless because a lot of
>people just use it to surf and therefore do not see the speed impact if
>the link has dropped to 1.5Mbits.
>
>Having said that, the new wireless gear on the market should be adequate
>enough for the job, especially the dual-bonded 54g gear.
>
>With everything wireless though.. YMMV.
>
>
>On Fri, 2004-12-03 at 13:49 +0100, Martijn Coenen wrote:
>  
>
>>Hello all,
>>
>>I would like to run a mythtv frontend on my xbox. For some very
>>strange reason my Xbox nic will only work on 10 mbit hubs, for all 100
>>mbit hubs/switches I tried it fails autonegotation. I've tried
>>everything, but something must be wrong with the NIC.
>>
>>Anyway, I read many topics about wireless connections to the
>>front-end, people complain that 802.11b ain't enough for frontend
>>(802.11b will boil down to 500/600 KB/s). However I cannot find the
>>actual bandwith requirements anywhere. I will be able to provide a
>>sustained 10 mbit feed (around 900 KB/s) to the frontend, do you guys
>>think it will suffice for average mpeg2 (4000 kbit)?  I know the
>>numbers say it should suffice, but practice is too often different
>>from reality.
>>
>>Thanks,
>>
>>Martijn Coenen
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>>mythtv-users at mythtv.org
>>http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>>    
>>
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>>
Just thought I would chime in on this.  When he stated "900 KB/s" 
(bytes), that is equivalent to 10 Mb/s (bits).  The MPEG stream is 4 
Mb/s (bits), so assuming you don't have any other traffic on that 
network segment, you should be OK.  I think the way you typed the 
numbers was confusing for some people.

Matt


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