Hi, This code comment suggests that during streaming, JPG quality adjustment takes place: /* * Adjusting the stream jpeg quality and frame rate (fps): * When during_quality_eval=TRUE, we compress different frames with different * jpeg quality. By considering (1) the resulting compression ratio, and (2) the available * bit rate, we evaluate the max frame frequency for the stream with the given quality, * and we choose the highest quality that will allow a reasonable frame rate. * during_quality_eval is set for new streams and can also be set any time we want * to re-evaluate the stream parameters (e.g., when the bit rate and/or * compressed frame size significantly change). */ - taken from https://cgit.freedesktop.org/spice/spice/tree/server/mjpeg-encoder.c#n122 That should do pretty much exactly what you want - adjust stream bandwidth to available network throughput, albeit by using jpeg quality instead of downscaling. That's better approach IMO as b/w savings can be as big as with downscaling but CPU load will be significantly lower. Regards, David On Út, 2016-04-12 at 17:18 +0800, hongzhen_luo@xxxxxxxx wrote: > Hello > > > Could you tell me how to reduce the image resolution or > definition ? > > I plan to reduce the image definition so that decrease data > transmission from server to client . > > For example ,I assume if I have a low bandwidth in my network > environment,but it's stable , I want to reduce the image definition > to ensure a small quantity of data were sent between the server and > client ,for the client can be worked normally (such as basic > operation). > > > But I don't know how to modify and control it (which functions > or attributes), if you know that ,please help me . Thank you very > much ... > > Best Regards > > > > > > > > _______________________________________________ > Spice-devel mailing list > Spice-devel@xxxxxxxxxxxxxxxxxxxxx > https://lists.freedesktop.org/mailman/listinfo/spice-devel _______________________________________________ Spice-devel mailing list Spice-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/spice-devel