[mythtvnz] CPU Usage on Sony HD demo channels on DVB-T Channels on Linux/Mythtv

[Steven Ellis]

On Sat, February 9, 2008 5:04 pm, Steven Ellis wrote:
>
> On Sat, February 9, 2008 4:45 pm, Craig Whitmore wrote:
>> I have an AMD 4800+ CPU with 2G of RAM . Nvidia Graphics Card.
>>
>> Watching The TV1/TV2.. Sony Demos on DVB-T under Mythtv (Sound but no
>> Audio as mythtv 0.21 doesn't know about the LATM transport for sound
>> (I've
>> checked the mythtv sources)
>>
>> Xorg uses near 100% and mythfrontend uses 100% as well (both CPU's)
>>
>> 25745 root      20   0  115m  94m  38m R   99  5.3  22:34.30 Xorg
>> 25753 mythtv    20   0  292m 176m  67m S   89 10.0  22:36.55
>> mythfrontend
>> 26041 mythtv    20   0  240m  36m 9.8m S    3  2.0   0:06.56 mythbackend
>>
>> And I get it jumping a little at times.. Seems ppl will need a faster
>> CPU
>> than the AMD 4800+ to watch the HD stuff without skipping. Testing Under
>> Windows as well the machine goes to 100% watching DVB-T with similar
>> jumpping.
>
> Have you tried with Mplayer SVN on the same hardware. I'm getting perfect
> playback on a single core on my Intel T2400 laptop. I'm just patching one
> of myPVR units to  have a try as well.

Just running live some tests on my Athlon X2 3600 test rig and mplayer
SVN, video is an integrated NVidia 6150 graphics chip.

The SD channels play at around 46-50% of a single CPU, although the
combination of AAC audio and Interlaced H.264 still has some bugs.

The 1080i test hammers the box as expected, and a single core can't cope.

The two 720p test channels look awesome on my 2407WFP display. Doing about
80% of a single core, and minimal AAC audio issues

I can also confirm that the MythTV MHEG-5 stack appears to work fine with
the DTT tests which is excellent news.

Steve

--------------------------------------------
Steven Ellis - Technical Director
OpenMedia Limited - The Home of myPVR
email   - steven at openmedia.co.nz
sales   - sales at openmedia.co.nz
support - support at openmedia.co.nz
website - http://www.openmedia.co.nz