Hi, On Tue, Jul 10, 2018 at 08:25:50PM +0800, molo wrote: > hi, > I am sorry to trouble you！ Don't be! > We encountered the problem of video picture jam in the > process of using the spice protocol, and the audio and video > out of sync problem also appeared in the drag and drop > player window. When trying to solve the problem, we changed > the encoding method from mjpeg to h264, but the problem > didn't seem to improve. After that we tried to encode with > hardware, but it failed. It seems that kvm can't access > NVIDIA's device driver. So many questions! - Are you using spice's server h264 encoding without any extra patch/changes, is that correct? In that case, spice-server (host) does software encoding with x264enc [0] [1] [0] https://gitlab.freedesktop.org/spice/spice/blob/master/server/gstreamer-encoder.c#L892 [1] https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-ugly-plugins/html/gst-plugins-ugly-plugins-x264enc.html As far as I know that's software encoding. It may works well with NVDIA, etc, but I haven't tested... but notice again that this is in the host machine. > Two question as follows： > 1、I want to confirm whether kvm can access the hardware > driver and perform hardware coding？ If x264enc can do it, yes. Otherwise you would need to implement something around nvenc [2] or some generic pipelines that try to use hardware encoding by default (on client, we use playbin) [2] https://bugzilla.gnome.org/show_bug.cgi?id=753405 > 2、Have you ever encountered video jams, audio and video out > of sync? How to solve it? Wouldn't it be better to decode on > the client side via hardware? > > spice-protocol：0.12.14 release > client:our software based spice-gtk(0.35 release) > spice-server:0.14 release > > > Hope that I will receive your reply soon。ths！ Not all replied but something to kick in discussion, cheers toso
Attachment:
signature.asc
Description: PGP signature
_______________________________________________ Spice-devel mailing list Spice-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/spice-devel