On Wed, Apr 11, 2018 at 10:22 AM, JimL <jimmy.lawren...@gmail.com> wrote:
> Hi, > > Is it possible to increase the frame rate received through WebSocket in VNC > session? > > For example, in TurboVNC, in case of low network, I can adjust the image > compression level to increase my frame rate. Is this possible through > Guacamole? Is it also possible to disable any image compression on > Guacamole > to give lossless image output? > Guacamole currently lacks the settings for compression to be able to do this within the Guacamole Client interface; however, it can be done in source code. If you find such settings useful, you can open a JIRA issue and request it as a feature. However, compression is generally only a problem if your system is either CPU or memory-bound, so if you're not seeing excessive CPU utilization or memory problems, disabling it may not make any difference. > > If such modifications are possible, could you give me some pointers on how > to go about it in the source code? > > They should be possible. I suggest taking a look at the LibVNCServer/LibVNCClient documentation: https://libvnc.github.io/doc/html/group__libvncclient__api.html It contains information on the function calls for setting encoding and compression. The Guacamole Server code initializes the VNC (rfb) client, here: https://github.com/apache/guacamole-server/blob/b61a6ab758177b4d4cec4a3a0a2f51a3e76c3772/src/protocols/vnc/vnc.c#L127 You can see there that the encodings get initialized from the provided options, and then the call to rfbInitClient contains two parameters set to NULL - you can set those as documented in the API documentation and see what happens. -Nick
