[mythtvnz] freeview HD on an AMD X2 6000+

Sun Oct 19 22:23:47 BST 2008

On 19/10/2008, at 6:54 PM, Andrew Richards wrote:

> Ah hadn't really thought of that, pretty sure I have only played  
> with SD
> upscaled stuff so far. However Bones is on tonight so will try with  
> that.
>
> My setup is an ASUS M2N-MX SE motherboard with 6100 graphics. CPU is  
> 50+
> plus while playing TV3, so very much bleeding edge.

Andrew - Can you run the following on your CPU so I can try and  
throttle mine to simulate your setup. We are quite similar as I have  
6150 graphics.

cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies

I get the following on a 6000+

3100000 3000000 2800000 2600000 2400000 2200000 2000000 1800000 1000000

>
>
> Steven Ellis wrote:
>>
>> On 19/10/2008, at 11:50 AM, Andrew Richards wrote:
>>
>>> 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?
>>
>> The bitrate and CPU load required for TV3 appears to vary quite a bit
>> depending on the content. For testing the best bet is to record a  
>> show
>> that is marked as broadcast in HD so you have a reliable reproducible
>> environment.
>>
>> Based on the CPU loading i'm seeing on a 6000+ and similar data for a
>> 5600+ I'm surprised you get the playback you are seeing. What MB and
>> GPU do you have?
>>
>>>
>>>
>>> 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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>>>
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>>
>> 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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>
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Steven Ellis - Technical Director
OpenMedia Limited
email   - steven at openmedia.co.nz
website - http://www.openmedia.co.nz

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