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schmidtbag

Member

From: NH, USA

Registered: 2011-02-08

Posts: 347

VNC over wifi

So, I was planning on working on something that would involve a game in motion.  The idea would be to have a dedicated desktop computer running a game at 1080p and would send a VNC stream via 802.11n wifi to an ARM device, which would control the display.  Note that the devices would be in ad-hoc mode; no other devices would be connected to the network, so both devices get 100% of the total bandwidth.  I chose 801.11n because a USB 2.0 adapter should be able to take advantage of the bandwidth, and most ARM devices are limited to USB 2.0 (not all).  Any 802.11ac USB 2.0 adapters have roughly the same performance as n but cost more.  I'm expecting very few objects to be in the way to obstruct the signal.

Here's what I'm wondering:
1.  Anyone know of any UDP based VNCs?  This would make a huge difference in frame rate and latency - there shouldn't be anything to really interfere with the data stream.
2.  It seems very unlikely I can get a 1080p 24-bit @ 60FPS display to stream over wifi - I honestly don't expect that to work.  But, supposing I got 150Mb/s adapters, do you think I can get 30FPS to stream, smoothly?
3.  I don't intend to transmit keyboard or mouse commands.  Is there an alternative to VNC with better performance that doesn't utilize those?
4.  What can I do to have the best encoding:latency ratio?  I obviously can't stream 1080p uncompressed, but compressing it too much will have a noticeable delay, especially considering the receiving end is ARM.

You might be asking "why not just use widi?" but from the few widi adapters I found, they're basically just a pair of wifi adapters that work through HDMI instead of USB - essentially exactly what I'm trying to do right now except more expensive (they have built-in encoders).  Also, I don't intend to transmit sound, so that's a lot of wasted bandwidth.

Last edited by schmidtbag (2014-02-11 19:28:47)

Rexilion

Member

Registered: 2013-12-23

Posts: 784

Re: VNC over wifi

Maybe look here. It's not UDP unfortunately.

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