Hi, On Wed, Aug 02, 2017 at 08:15:06PM +0430, Armin Ranjbar wrote: > Thanks for the answers! > > Can i force already existing versions of remote-viewer to use H264 > and/or different compression algorithm by changing libspice-server so > that it only advertise certain codec/algorithms? There is no implementation in the host to change video-codec yet. You can see [0] for some easy way to change spice server code in a way that every new stream would be encoded with h264. [0] https://lists.freedesktop.org/archives/spice-devel/2016-July/030936.html We do have an API called spice_server_set_video_codecs() [1] that QEMU could call but there were discussions about the interface or configuration that we should expose... The related thread is here [2]. [1] https://cgit.freedesktop.org/spice/spice/tree/server/reds.c#n4037 [2] https://lists.freedesktop.org/archives/spice-devel/2017-February/035480.html Cheers, toso > > --- > Armin ranjbar > > > On Wed, Aug 2, 2017 at 7:24 PM, Victor Toso <victortoso@xxxxxxxxxx> wrote: > > > Hi Armin, > > > > Thanks for your questions. > > > > On Wed, Aug 02, 2017 at 06:56:07PM +0430, Armin Ranjbar wrote: > > > Hello List, > > > > > > Thanks for the effort on Spice :) > > > > > > given recent changes by Victor, i'm not sure how can i verify that i'm > > > actually using Gstreamer to encode or decode the stream: > > > > Things to consider: > > - GStreamer is not default option for encoding > > - You have to enable stream encoding [0] as it is disabled by default > > - mjpeg is the default encoding/decoding video-codec > > > > [0] if you use libvirt, you can add streaming mode with: > > virsh edit $domain > > <graphics type='spice' autoport='yes'> > > <streaming mode='all'/> > > </graphics> > > > > > 1> how can i make sure that server is using gstreamer to encode the > > stream? > > > setting GST_DEBUG and SPICE_DEBUG i can't see anything gstreamer specific > > > in servers logs. > > > > There are pending work to better configuration in the host for that. The > > easiest way is to use spicy and chose a video codec which is not mjpeg > > (h264, vp8, vp9); Go to options > preferred video codec type > h264 > > > > This will send a message to the spice server to use h264 instead of > > mjpeg and only gstreamer can encode it. > > > > > 2> how can i make sure same thing happens on client side? again with > > debug > > > options, i can see that spicy is streaming using channel-display.c:1840 > > not > > > channel-display-gst.c. > > > > You can also use mjpeg decoders in GStremear (it actually works well) > > but you will need to build spice-gtk with --disable-builtin-mjpeg, so > > every new stream will use gstreamer. > > > > Note that we don't stream all the content all the time. Video streams > > start/stop based on detection of regions that have high frequency of > > updates, you can check [1] for a better understanding. > > > > [1] https://youtu.be/C5ox_M-k63w > > > > > > > > 3> afaik video encoding and compression selection is for now specific to > > > spicy, how can i set these options using remote-viewer? > > > > The video-codec message is part of spice-protocol and implemented in > > spice-gtk. We have an API in spice-gtk which spicy uses but none other > > client does at the moment. > > > > The goal is to automatically detect which video codecs we can hw decode > > in the client and send this to spice-server. That is not implemented > > yet. > > > > > note that i'm building both spice and spice-gtk from latest git commit, > > > > > > --- > > > Armin ranjbar > > > > Let me know if you have any issues or suggestions! > > > > Cheers, > > toso > >
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