It works, but you have to be connecting to a server that supports JPEG
encoding.  The built-in VNC server in OS X doesn't, for instance, so
you're probably actually using Hextile or ZRLE.  Thus, the titlebar
reflects what you requested, not necessarily what you got.  The Java
viewer (and I think the Windows viewer as well) will show you the "most
recent encoding" in their Connection Info dialogs, which tells you
whether the server is honoring your request or not.  Unfortunately,
there's not a very straightforward way to make the GUI reflect what the
server is actually sending you, because it is perfectly legal for the
VNC server to ignore all of your requested encodings if it doesn't
support them, and it's also perfectly legal for it to send each
framebuffer update using a different encoding.  However, in reality, VNC
servers don't change encodings that frequently, so it seems like it
would be reasonable to have the titlebar reflect the most recent
encoding used, rather than what was requested.

On 8/14/12 7:07 AM, James Wettenhall wrote:
> Hi,
> 
> Does the TurboVNC X11 vncviewer's -quality option work on Mac OS X ?
> 
> I have tried:
> 
> -samp 4x -quality 30
> 
> which results in the following appearing in the VNC window's title bar:
> 
> [Tight + JPEG 4X Q30]
> 
> but the images look remarkably good - I can't see the same artefacts I see 
> when using a low image quality quality setting with the Windows TurboVNC 
> viewer.
> 
> Thanks,
> James

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