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-   -   (never mind)Could steam stream work on N900? (https://talk.maemo.org/showthread.php?t=100415)

homejogger 2018-07-27 00:40

(never mind)Could steam stream work on N900?
 
There are several posts on youtube that N900 ‘stream’ pc desktop with VNC client. The laggy is noticable. Is there any way we could remote play pc games on N900 via wireless streaming?
Hope to find an answer.

coderus 2018-07-27 06:52

Re: Could steam stream work on N900?
 
Even official Steam Link requires 5GHz wlan to work.

endsormeans 2018-07-27 09:04

Re: Could steam stream work on N900?
 
Steam Streaming....?
the practice of streaming a pc desktop via vnc. and gaming?
I think a more static game like chess...would be possible...
But if you are hoping for world of warcaft or assassins creed...
hahahahaha....
yeah...
sure it should work...
do some video and post it here...
I want to see the results...

Kabouik 2018-07-27 17:49

Re: Could steam stream work on N900?
 
Steam streaming is actually very playable, it uses its own encoding and does not rely on VNC or Rdesktop and the like. Just like Parsec or Shadow.tech or other cloud computing solutions, the video stream is optimized to reduce latency to negligible levels, and it works quite well as long as you have enough bandwidth or are streaming within local network.

On the N900, however, it probably won't work because a 2.4 GHz WLAN would be insufficient in some occasions, and h.264 or h.265 hardware decoding are often required to get a good FPS without any latency.

pythoneye2 2018-07-27 19:33

Re: Could steam stream work on N900?
 
Quote:

Originally Posted by Kabouik (Post 1546654)
On the N900, however, it probably won't work because you would a 2.4 GHz wifi signal would be insufficient in some occasions, and h.264 or h.265 hardware decoding are often required to get a good FPS without any latency.

N900 has a hardware decoder for h.264 ;)

I did something like that in 2014 https://talk.maemo.org/showthread.php?t=93178

But as Kabouik said it is difficult, because to get low latency you need to get hardware to work at several places in your software stack. Decoding and especially encoding for example which mostly includes proprietary software which in consumer products is mostly badly supported.
(Last time i checked, nobody in the industry wants you to share your gfx card or the game you bought )

To make things worse every bug in your stack can destroy your latency. On N900 for example the wifi powersaving method can depending on your router introduce huge latency.

There are bugs/incompatibilities in gstreamer0.10-maemo and gstreamer1.*

Linux/maemo is not an realtime OS. Swapping, tracker, pulseaudio (is somehow cpu heavy on n900) and or other systems can introduce lags which you most likely wont fix.

Kabouik 2018-07-27 19:56

Re: Could steam stream work on N900?
 
Quote:

Originally Posted by pythoneye2 (Post 1546655)
N900 has a hardware decoder for h.264 ;)

I did something like that in 2014 https://talk.maemo.org/showthread.php?t=93178

Damn, and I can't even get it to work on my desktop Linux computer with an i5 and an AMD HD 7850 because the open drivers don't support it for this hardware. N900 almighty, once again. :D

tortoisedoc 2018-07-27 20:12

Re: Could steam stream work on N900?
 
Quote:

Originally Posted by pythoneye2 (Post 1546655)
N900 has a hardware decoder for h.264 ;)

I did something like that in 2014 https://talk.maemo.org/showthread.php?t=93178

But as Kabouik said it is difficult, because to get low latency you need to get hardware to work at several places in your software stack. Decoding and especially encoding for example which mostly includes proprietary software which in consumer products is mostly badly supported.
(Last time i checked, nobody in the industry wants you to share your gfx card or the game you bought )

To make things worse every bug in your stack can destroy your latency. On N900 for example the wifi powersaving method can depending on your router introduce huge latency.

There are bugs/incompatibilities in gstreamer0.10-maemo and gstreamer1.*

Linux/maemo is not an realtime OS. Swapping, tracker, pulseaudio (is somehow cpu heavy on n900) and or other systems can introduce lags which you most likely wont fix.


Is there public low-level api's to the decoder hw? OpenMAX is probably not fast enough to provide proper playability.

pythoneye2 2018-07-27 23:20

Re: Could steam stream work on N900?
 
Quote:

Originally Posted by Kabouik (Post 1546656)
Damn, and I can't even get it to work on my desktop Linux computer with an i5 and an AMD HD 7850 because the open drivers don't support it for this hardware. N900 almighty, once again. :D

If i remeber correctly i did encoding in software because quality was better and better portability. (And of course not soo much pain!) But also used small resolutions.

Quote:

Originally Posted by tortoisedoc (Post 1546658)
Is there public low-level api's to the decoder hw? OpenMAX is probably not fast enough to provide proper playability.

I use(d)
http://talk.maemo.org/showthread.php?t=77695

Is this nokia/ti/freemangordon stuff is still OpenMAX?

it wasnt primary for gaming so "stable" lag was tolerable.

tortoisedoc 2018-07-28 08:02

Re: Could steam stream work on N900?
 
Quote:

Originally Posted by pythoneye2 (Post 1546662)
If i remeber correctly i did encoding in software because quality was better and better portability. (And of course not soo much pain!) But also used small resolutions.



I use(d)
http://talk.maemo.org/showthread.php?t=77695

Is this nokia/ti/freemangordon stuff is still OpenMAX?

it wasnt primary for gaming so "stable" lag was tolerable.


Hmm DSP overclocking might be necessary for 720p. That sounds like it's pushing the boundaries on h.264.

Yes, I looks like this is openmax. But there's dsp libraries, perhaps something can be found from there (assuming they are usable from userspace, that is). If the decoding is fast enough, it might be playable even with openmax, but considering the openmax architecture, it might be too many threads for the OMAP to be efficient.


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