[Parti-discuss] jpeg compression

[lars hofhansl]

Here is the patch (I hope it comes through as an attachment).


The JPEG compression stuff currently lives in server.py. Another option is to put it in protocol.py, but that would mean moving knowledge about specific packets into protocol.py.


----- Original Message ----
From: Antoine Martin <antoine at nagafix.co.uk>
To: lars hofhansl <lhofhansl at yahoo.com>
Cc: parti-discuss at partiwm.org
Sent: Wednesday, August 5, 2009 1:19:17 PM
Subject: Re: [Parti-discuss] jpeg compression

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Hello,

Sounds great, please send it on!

Antoine

lars hofhansl wrote:
> Hello, 
> 
> 
> I have a relatively clean patch to enable JPEG compression for Xpra.
> Is there general interest in that? If so, I'll forward a patch against Xpra-current to the list.
> 
> The advantages of using jpeg compression are not necessarily obvious.
> 
> In my tests I found that for "text only" traffic (emacs, terminals, etc) the message sizes sent over the wire actually *increase*
> unless a very low quality (with corresponding bad results) is chosen.
> 
> For other traffic like web browsing, the savings are sometimes quite good (reducing traffic by 25-75%). 
> For (natural) image intensive application (photo viewer, gimp, etc) traffic is often reduced by as much as 95%.
> (Boh depending on the quality chosen. At quality setting 60 the savings are quite good).
> 
> Thanks.
> 
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