Hi, On Wed, Jul 22, 2015 at 04:14:23PM +0800, 乱舞 wrote: > hi,all: > When I transport images with jpeg in spice to reduce bandwidth. > i modify the spice-server red_worker.c > > worker->jpeg_state = SPICE_WAN_COMPRESSION_ALWAYS; > it worked, but caused some image visual problems, > if use jpeg ,there is a black rectangle In the upper left corner of lock screen(picture 1 inside the redline). > and when i move the window there would be many black lines on the screen (picture 2) > when use glz ，quic,or lz4, There would not be such a problem. But when I use jpeg ,the bandwidth would be lower,so I need to solve the problem. > How to solve this problem ？ because of lossy ? Well, yes, I think this only happens due the lossy compression. It is hard to have a win-win situation with bandwidth, processing and quality. Javier sent a patch upstream where you can chose preferred image compression by client's command line (--spice-preferred-compression) I think it can be useful for you, to test the image quality over your system requirements. Cheers, Victor Toso _______________________________________________ Spice-devel mailing list Spice-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/spice-devel