Re: [FreeRDP-devel] FreeRDP2 on Ubuntu

[Armin N. <an...@th...>]

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
> <fre...@li...
> <mailto:fre...@li...>> 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
>     >
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