Hi Armin, Thanks for your help! The VM doesn't have a GPU, but I don't think that's the problem since it has a fairly beefy CPU and when using Microsoft's RDP, there is no latency at all.
You mention that FreeRDP does all the H.264 decoding in software. I know most hardware today comes with H.264 hardware decoder to free the CPU from doing this, could that be what slows it down in this case? I would expect Microsoft's RDP to do H.264/265 decoding on the hardware? Are there any plans to have FreeRDP do the decoding in hardware/would that help at all? I've tried running a graphics-intensive application like Fortnite on the VM through FreeRDP and the CPU was clocking 100% just from the launcher, which I suspect is because of the software encoding/decoding, while it was only 30% CPU usage on a regular Windows 10 desktop. Thanks for answering my questions, I really appreciate it! Philippe On Sun, Sep 15, 2019 at 4:24 AM Armin Novak <ano...@thincast.com> wrote: > Hi, > > sorry for the delayed response ;) > > I know the video, and it still works on that machine as you have seen ;) > > > so, the 'latencey' you experience can have 3 sources: > > * real network latency (doubtful) > > * your CPU (freerdp does all decoding in software only) > > * your GPU (or the bus) are too slow for the bitmap updates (could be a > driver issue) > > > in any case, you cold run sysprof and have a look in what is utilizing the > most resources on your machine. > > that might help finding out what is slowing it down and fix that. > > > so you can imagine what happens here a simplified pipeline: > > -> network -> openssl -> software decoder -> afterprocessing -> merge with > virtual framebuffer -> send to GPU > > | > > <- network <- openssl <- report latency <- > > > so, if your client is not fast enought in processing the data the server > will reduce quality. > > > regards > > Armin > > Am 13.09.19 um 14:11 schrieb Philippe Noël: > > Apologies, here's more detail about my setup: > > I am running Ubuntu 18.04 (Bionic Beaver) on my local device (laptop) and > I am using FreeRDP to RDP into an Azure Virtual Machine running Windows 10. > The machine has 4 CPU cores and 16 GB Ram, and I have tested using the > Mircrosoft RDP from a windows laptop into it and there is no latency at > all, even when watching videos, which seems to indicate to me that it is > not the Internet connection or the hardware. > > I first tried downloading FreeRDP using "sudo apt-get install > freerdp-x11", which I then realized later when looking at the Ubuntu > packages downloads FreeRDP 1.1.0. For this setting, /gfx:avc444 was a valid > command and helped make videos much more fluid, reducing slightly the > quality. When using this FreeRDP, the graphics has very high latency and on > YouTube videos/webpages with a lot of images, I can see the frames being > drawn from top to bottom which makes the experience very unusable. It was > better with avc444, but still not ideal (still a significant difference > compared to Microsoft RDP). > > I was then advised to instead use FreeRDP 2, which I tried downloading > using "sudo apt-get install freerdp2-x11", which I had a bit more trouble > using (since I understand it is not yet, although very close to, an actual > release build) and was surprised to see that it made no difference in > latency really (and was worse since I couldn't use avc444). > > I dug a bit online and found a YouTube video ( > https://www.youtube.com/watch?v=N5IkONhAQdc) from many years ago > showcasing FreeRDP 1.1 with barely any latency on videos, and this is > essentially the behavior I would like to reproduce. Any advices on how to > fix this, or is it because some features are not yet implemented? > > Sorry for the rant and thanks a lot for your help, I really appreciate it. > > Philippe > > On Fri, Sep 13, 2019 at 3:13 AM Armin Novak via FreeRDP-devel < > freerdp-devel@lists.sourceforge.net> wrote: > >> * ubuntu does not compile against ffmpeg (wich is in universe) so you >> only have /gfx:rfx >> >> * you could give some information on where you are using the stuff ;) >> 'incredibly glitchy' could be as simple as too slow hardware... >> >> freerdp currently does all frame decoding in software, so be sure your >> CPU is fast enought for that (and your graphics drivers can handle >> bitmap updates well, there are some that are known to be slow) >> >> >> regards >> >> Arminnn >> >> On 9/13/19 1:18 AM, Philippe Noël via FreeRDP-devel wrote: >> > Hi, >> > >> > I tried downloading freeRDP2 on Ubuntu 18.04 with apt-get ( >> > https://packages.ubuntu.com/bionic/x11/) but it doesn't work quite >> well. I >> > can't enable /gfx:avc444 and the video frames are incredibly glitchy, >> any >> > advices? >> > >> > Cheers, >> > >> > Philippe >> > >> > _______________________________________________ >> > FreeRDP-devel mailing list >> > FreeRDP-devel@lists.sourceforge.net >> > https://lists.sourceforge.net/lists/listinfo/freerdp-devel >> >> >> _______________________________________________ >> FreeRDP-devel mailing list >> FreeRDP-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/freerdp-devel >> > _______________________________________________ FreeRDP-devel mailing list FreeRDP-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freerdp-devel
