[mythtvnz] freeview HD on an AMD X2 6000+

[Andrew Richards]

I am now running this same set-up on my 5200X2, haven't done a through 
test but in simple terms I can play TV3.

Well, at least I can while nothing else is happening. Unfortunately 
playback and commskip cannot co-exists without stuttering.  What I am 
trying to figure out is:

- How to select audio streams? I want to use AAC on TV3 all the time, 
yet cannot see where to change this
- How to turn off Loopfilter. In Playback Profiles I leave it on CPU+ 
and edit the second entry (if rez <=1280 720 & > 720 576 ->XvMC) to use 
2 CPU's and uncheck the Loopfilter box. I also changed the Primary 
Deinterlacer to One Feild. I assumed all this would lower CPU usage but 
it doesn't.

Also I am confused about the Loopfilter box, my reading of the 
instruction is that with it checked, Loopfilter is enabled. This is the 
default setting, yet by default my machine can play 1080i video which I 
wouldn't expect without skiploopfilter. So it seems to be this setting 
isn't being properly respected. Any thoughts?

Steven Ellis wrote:
>
> On 14/10/2008, at 10:35 AM, Steven Ellis wrote:
>
>>
>> My X2 6000+ was delivered just an hour or so ago and now have working 
>> TV3 - subject to a couple of minor niggles below.
>>
>> I'm running Ubuntu 8.04 with Paul's most recent patched MythTV 
>> release and loopfilter disabled in my playback profile. The 
>> motherboard is an M2NPV-VM with 2G Ram and a Hauppauge HVR-900 USB tuner.
>>
>> Previously I had an X2 3600+ in my test rig which really didn't cut it.
>>
>> X2 3600+
>> cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies 
>> 2000000 1800000 1000000 
>>
>> X2 6000+
>> cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies 
>> 3100000 3000000 2800000 2600000 2400000 2200000 2000000 1800000 1000000 
>>
>> Ok so a lot more speeds to play with but for the purposes of testing 
>> I changed the governor to performance which locks the CPU at its 
>> fastest speed.
>>
>> echo "performance" > 
>> /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor 
>>
>> So First a bunch of pre-recorded content
>>
>> Channel CPU CPU with Bob
>> TV3 83% 100+
>> TV2 50% 50%
>> TV One 50% 50%
>>
>> Live content
>>
>> Channel CPU CPU with Bob
>> TV3 83% 100+
>> TV One 59% 59%
>> CTV8 21% 25%
>> TVNZ 6 21% 24%
>>
>> So it appears that the Bob de-interlacer adds quite a bit of 
>> additional load, but thankfully most of that appears to be on the 
>> second core. For TV3 above I get 88% on one core and 29% on the 
>> second core with Bob. Without a de-interlacer almost all the load is 
>> on one cpu.
>>
>> There doesn't appear to be much of a performance difference between 
>> playing AC3 or AAC on TV 3 which is good news.
>>
>> So the niggles
>> 1. The X2 6000+ is a 89W CPU part so the core is hotter and the fan 
>> faster than I'd prefer. There are rumours of some lower power parts, 
>> but they might only work in AM2+ compatible boards.
>>
>> 2. Occasionally I get a picture in picture effect when I switch 
>> between 720p and 1080i channels which I have two copies of the same 
>> video feed on screen, one of which is in a small box in the top left 
>> hand of the screen.
>>
>> 3. The AAC audio doesn't always lock on a channel change
>>
>> So I have something that works, but I wouldn't consider it customer 
>> ready.
>>
>> I think I need to consider an Intel compatible alternative, but can't 
>> find a board with integrated Composite/Component/SVideo as well as 
>> DVI/HDMI in the Intel space.
>>
>
> Turned CPU scaling back on which is rather interesting
>
> For 720p channels it is happy to peg the cpu at 1.8 GHz, for  1080i it 
> goes all the way upto 3.1 GHz.. The SD channels go all the way down to 
> 1GHz which is the lowest speed setting.
>
> Going to leave the box playing TV3 for a couple of hours and see how 
> it copes with the load.
>
> Steve
>
>
> Steven Ellis - Technical Director
> OpenMedia Limited
> email   - steven at openmedia.co.nz <mailto:steven at openmedia.co.nz>
> website - http://www.openmedia.co.nz <http://www.openmedia.co.nz/>
>
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