Linux video off-loading to graphics card - Techwatch Support Forums: Digital & Satellite TV, FTA, Cable, Computers, Mobile Phones, Apple and General Tech Forums

Stv · 07-03-07, 12:04 AM

This is worth reading if anybody is considering graphics cards for a mythtv setup:

http://www.mythtv.org/wiki/index.php/XvMC

By the look of it only MPEG2 streams can be offloaded at present. I'm not sure what this will mean once HDTV is being transmitted using DVB-S2 & MPEG4 - nor whether decoding MPEG4 will be more or less taxing when compared with MPEG2.

BGonaSTICK · 07-03-07, 01:05 PM

Sounds interesting. I don't pretend to understand the detail, but handing off some stuff to the GPU has got to be good.

I'm also unsure if the processing overhead for MPEG4 will be more or less that MPEG2. I think it's more efficient in terms of bandwidth, but whether that means more processing or not I don't really know. I would suspect yes based on what people are finding with other software-based solutions, but we'll have to wait and see I guess.

Anybody using this yet?

fergycool · 10-03-07, 07:29 PM

Hi,

One more reason for me to regret getting an ATI card for my MythTV box, is that the drivers support XVMC! Shame!

Cheers
Ferg

07-03-07, 12:04 AM	#1 (permalink)
Stv Member Join Date: Feb 2007 Posts: 54 Thanks: 0 Thanked 0 Times in 0 Posts	Linux video off-loading to graphics card This is worth reading if anybody is considering graphics cards for a mythtv setup: http://www.mythtv.org/wiki/index.php/XvMC By the look of it only MPEG2 streams can be offloaded at present. I'm not sure what this will mean once HDTV is being transmitted using DVB-S2 & MPEG4 - nor whether decoding MPEG4 will be more or less taxing when compared with MPEG2.

07-03-07, 01:05 PM	#2 (permalink)
BGonaSTICK Dodgy Geezer Join Date: Nov 2005 Location: Brighton Posts: 9,718 Thanks: 3 Thanked 163 Times in 57 Posts	Re: Linux video off-loading to graphics card Sounds interesting. I don't pretend to understand the detail, but handing off some stuff to the GPU has got to be good. I'm also unsure if the processing overhead for MPEG4 will be more or less that MPEG2. I think it's more efficient in terms of bandwidth, but whether that means more processing or not I don't really know. I would suspect yes based on what people are finding with other software-based solutions, but we'll have to wait and see I guess. Anybody using this yet? __________________ Dreambox 7000, Skystar2 PCI, Skystar USB, Fibo 90cm on Moteck SG2100, Triax TD110 multi-LNB. Sky + ART cards. 45.0°E - 58.0°W

10-03-07, 07:29 PM	#3 (permalink)
fergycool Member Join Date: Aug 2006 Posts: 57 Thanks: 0 Thanked 0 Times in 0 Posts	Re: Linux video off-loading to graphics card Hi, One more reason for me to regret getting an ATI card for my MythTV box, is that the drivers support XVMC! Shame! Cheers Ferg __________________ Climb up it, kayak down it + make sure it runs on GNU/Linux<br />"cease to exist, giving my goodbye, drive my car into the ocean,<br />you think I'm dead, but i sail away, on a wave of mutilation!"