We are pleased to announce that the TurboVNC encoder is now being used by libvncserver 0.9.9 (http://libvncserver.sourceforge.net/) and will eventually make its way into applications that are built with libvncserver.
Integration of the TurboVNC encoder into the libvncserver project was mainly intended as a means of building a high-speed version of x11vnc (a VNC server for the root X display-- x11vnc is included as part of the libvncserver code base.) However, extensive discussions with and review by the libvncserver developers resulted in additional research, building upon the same techniques used when designing the TurboVNC 0.5 codec (http://www.virtualgl.org/pmwiki/uploads/About/tighttoturbo.pdf). This additional research revealed that compression levels 6-9 are basically useless in TightVNC, providing no noticeable reduction in bandwidth for any 2D or 3D test datasets while exponentially increasing CPU time. TurboVNC already provided similar compression ratios (better, in many cases) with much better performance than the lower TightVNC compression levels, so we discovered that the only thing preventing us from replacing the TightVNC encoder entirely was the lack of a mode in TurboVNC that emulated the "tightness" of TightVNC's Compression Level 5 in all cases. Compared to TurboVNC's Compression Level 2, this new compression level (which is undocumented in TurboVNC but which can be accessed by selecting compression level 9 from the command line) improves bandwidth usage only marginally and only for a handful of 2D apps, and it generally doubles CPU usage across the board. However, it allows those who formerly used the TightVNC encoder to rest assured that they will still be able to produce the same "tightness" using the TurboVNC encoder. ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ VirtualGL-Users mailing list VirtualGL-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/virtualgl-users
