[vlc] Re: Problem streaming over wireless link

[Brian Raymond]

There are some issues on wireless networks revolving around high  
packet rate applications and the type of traffic, be it unicast or  
multicast. Depending on the type (b/a/g) an AP can't handle the  
packet rate needed to support a large number of unicast clients.  
Related to that is the loss rate for wireless frames, this isn't an  
exact number but when you start pushing more then ~350 pps on APs you  
will see loss. If you are pushing multicast traffic out you need to  
look at your AP's multicast rate and how it handles things.

For example I can bury an Apple Airport AP with about 400KBps of  
multicast traffic from VLC even with the multticast rate on the AP  
pushed up as high as it will go.

- Brian


On Nov 16, 2005, at 10:23 AM, Chhaya, Harshal wrote:

>
> Petr,
>
> It is likely that your wireless link has noticeable packet loss.
> Most wireless protocols support re-tries but some vendors turn
> this feature off for long-distance point-to-point links. You
> may want to check if your wireless equipment has this feature.
>
> FTP will work fine since it uses TCP which has a re-transmission
> mechanism. However UDP has no such method to re-send lost packets
> and the result will be very bad video.
>
> Please try Marian's suggestions and let us know if using RTP or TCP
> helped.
>
> Regards,
> - Harshal
>
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