[mythtvnz] Multithreaded H.264 playback

[Steve V]

I've just built a PC with aASUS 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> 
) 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.

Cheers
Douglas.



Aaron Whitehouse wrote:
> Hello all,
>
> My 2002 MythTV PC has finally given up the ghost and I am replacing it
> with a new AMD 780G setup. We are limited to analogue (one software bttv
> card and a hardware Hauppauge PVR 150) as we don't have the correct
> aerial or DVB cards.  One day soon, I would like to move to DVB-T HD.
> I'm a long time member of this list and know about VDPAU etc.
>
> I am currently trying to decide on the CPU and am choosing between a
> cheap Sempron LE-1200 and a cheap dual core Atlon X2 5000+ (or similar).
>  What I was hoping someone could tell me is: what speed dual core I
> would need to decode Full HD H.264 in software once the ffmpeg-mt
> patches trickle down into the binaries?  Obviously, in an ideal world,
> AMD would release open specs of the UVD2 chips, or at least include
> support in the Catalyst drivers.
>
> If I would need some ridiculously expensive chip, then I may as well buy
> a cheap Sempron and replace it in the future (when prices come down) if
> I ever need to decode HD in software. If I could decode HD on an X2
> 5000+, then I would likely buy one of those and take advantage of better
> multitasking etc. in the interim.
>
> Thanks for your help,
>
> Aaron
>
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