[vbox-dev] SPICE vs VRDP performance?

[Achim Hasenmueller]

VirtualBox 3.2 comes with VRDP video acceleration which is a true game changer although we didn't make a big fuss about it. We automatically detect video areas (independent of the guest OS) and switch from lossless but (in case of video) bandwidth hungry RDP compression to lossy Motion JPEG compression for those areas -- all with runtime configurable quality/bandwidth. This requires support in the RDP client and today, we are only aware of the Microsoft RDP 7 client supporting this. I hope that it will find its way into rdesktop one day.

SPICE is built on combining lossless and lossy compression and I think with VirtualBox 3.2 things are turning out in our favor because of our unique approach (OS independent) combined with the very strong RDP features. RDP has so many sophisticated things like font download, icon caching etc. that other protocols don't have. And there are lots of clients out there.

Achim.

On May 21, 2010, at 07:48 , Huihong Luo wrote:

> I was wondering whether slow video is a fundamental flaw of RDP, or it's just an implementation issue. Any ideas? as long as there is nothing inherent that prevents RDP from having fast video, then it's just a matter of time to make it faster.
> 
> --- On Thu, 5/20/10, Geoff Nordli <geoffn at gnaa.net> wrote:
> 
> From: Geoff Nordli <geoffn at gnaa.net>
> Subject: Re: [vbox-dev] SPICE vs VRDP performance?
> To: vbox-dev at virtualbox.org
> Date: Thursday, May 20, 2010, 3:28 PM
> 
> 
> 
> From: vbox-dev-bounces at virtualbox.org [mailto:vbox-dev-bounces at virtualbox.org] On Behalf Of Alexey Eremenko
> Sent: Thursday, May 20, 2010 1:23 PM
> 
> SPICE is great for video (on LAN), and for keys capturing... (ctrl+alt+...) or winkeys.
> 
> Video on RDP is sloooow. But I have not tried the new RDP 7 (VBox 3.2)
> 
> 
> 
> Hi Alexey.  
> 
> Personally, I think vbox has something up their sleeve with the new remote video channel.  I don't think they would build something that would just work on a Windows OS.  Actually, I am not sure that the remote video even works on anything other than Windows 7.
> 
> 
> Geoff  
> 
> 
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--
Achim Hasenmueller
Director Engineering, VirtualBox
Sun Microsystems GmbH
Werkstrasse 24
71384 Weinstadt, Germany
phone: +49 7151 604050


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