raspberrypirocks
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Re: Open-source video drivers?

Mon Jun 30, 2014 7:31 pm

I doubt you could do it without going to something highly compressed like H264.
Is that due to network bandwidth or is there a different bottleneck?

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AndrewS
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Re: Open-source video drivers?

Mon Jun 30, 2014 8:00 pm

raspberrypirocks wrote:jamesh, it is available:
http://www.newegg.com/Product/Product.a ... 6813190005
Perhaps Ahh, now I see what's happened :!:
When visiting that URL from the UK (which is where JamesH and myself are located) that URL automatically redirects to http://www.newegg.com/global/uk/Product ... 6813190005 which says "OUT OF STOCK" and "UNAVAILABLE" in big letters. But if you then click on the flag to select United States (which I guess is where raspberrypirocks must be located) it then shows as available for $192.99
Hence the confusion ;)

raspberrypirocks
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Joined: Thu Jun 26, 2014 3:05 pm

Re: Open-source video drivers?

Mon Jun 30, 2014 8:34 pm

I've been tracked! :) Thanks Andrew.

jamesh
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
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Re: Open-source video drivers?

Tue Jul 01, 2014 8:31 am

raspberrypirocks wrote:
I doubt you could do it without going to something highly compressed like H264.
Is that due to network bandwidth or is there a different bottleneck?
Bandwidth anywhere really. Uncompressed, a single frame of a desktop (lets say 1080p) is over 2.5MB. If you want 30fps, that 75MB's, which is 600Mbits/s. That a LOT of bandwidth both for the network, and for the processor to handle - to receive it then try and display it. H264 will reduce that to 15Mbits/s or so, and of course the inbuilt HW decoder means the ARM core on the Raspi would be free to handle everything else.

I've ignore 'dirty area' optimisation where only the bit that changes needs to be transmitted, since if you want to VLC a screen showing a video, you need to send it all anyway. It's a worst case scenario, but not an uncommon one.
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raspberrypirocks
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Joined: Thu Jun 26, 2014 3:05 pm

Re: Open-source video drivers?

Tue Jul 01, 2014 1:49 pm

Is there a known method for compressing/encoding a desktop session that way for forwarding?

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hanzelpeter
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Re: Open-source video drivers?

Tue Jul 01, 2014 2:04 pm

I am interested in this too.

Found some way how to enable x264 encoding on VNC server. But I was unable to find a VNC client with support for x264 fow windows. For Linux there is a way to patch VNC client and compile with x264 support. But I have not tried.

raspberrypirocks
Posts: 14
Joined: Thu Jun 26, 2014 3:05 pm

Re: Open-source video drivers?

Tue Jul 01, 2014 2:16 pm

Nice, so encoding x264 on VNC should be working? Which VNC was that? TightVNC, OpenVNC?

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