[mythtvnz] Multithreaded H.264 playback

[criggie]

Related question - how much CPU does a dedicated backend need to deal 
with HD ?

I'd expect that the mpeg stream needs to be saved to disk as fast as it 
comes in, and that's about it...   Your thoughts?


Steve V wrote:
> I've just built a PC with a ASUS M3N-H/HDMI. VDPAU is working, still 
> some testing and tuning to be done.
> 
> I can view TV3 with around 12%CPU usage on one core. I have some bad 
> blocking on fast moving objects on TV1, 2 and 3.
> 
> Cheers
> 
> Steve
> 
> ------------------------------------------------------------------------
> *From:* Douglas Pearless <Douglas.Pearless at pearless.co.nz>
> *To:* MythTV in NZ <mythtvnz at lists.linuxnut.co.nz>
> *Sent:* Sunday, 15 February, 2009 5:32:39 PM
> *Subject:* Re: [mythtvnz] Multithreaded H.264 playback
> 
> I'd skip the 780G chipset and go for one that uses a NVIDIA 8300, or
> 9300/9400 video chipset so you can actually use VDPAU as I do not recall
> the 780G as supported by VDPAU.
> 
> I am currently thinking about a ASUS M3N-H/HDMI (
> http://www.asus.co.nz/products.aspx?l1=3&l2=149&l3=676&l4=0&model=2181&modelmenu=1 
> <http://www.asus.co.nz/products.aspx?l1=3&l2=149&l3=676&l4=0&model=2181&modelmenu=1> 
> 
> <http://www.asus.co.nz/products.aspx?l1=3&l2=149&l3=676&l4=0&model=2181&modelmenu=1 
> <http://www.asus.co.nz/products.aspx?l1=3&l2=149&l3=676&l4=0&model=2181&modelmenu=1>> 
> 
> ) as you can set the video memory to 512MB which is the minimum you
> require for the current VDPAU support, you can get this for under $188.
> 
> Does anyone use / tried this one for VDPAU??
> 
> If you go for the above, I'd keep the PVR150 for the analog MPEG2
> encoder, dump the BTTV card (save your CPU cycles) and get a Hauppauge
> Nova-t 500 dual DVB-T tuner so that all your front end tuners deliver 
> data that can be stream directly to your hard disk with minumal CPU
> overhead.  If you use a VDPAU compatible video card with 512MB of video
> RAM then I suspect you can get away with a  lower powered CPU, provided 
> you do not want to do lots of simultaneous recording, playback and
> commerical flagging at the same time.  I'd recommend you get a low end
> AMD dual core and upgrade if and when you need to.


-- 
Criggie

http://criggie.dyndns.org/