[mythtvnz] H264 Performance - Patch to enable skip loop filtering and use 2 threads.

[Andrew Richards]

Steve,

That would make sense then. I think PowerDVD is using multi-core, it
definitely isn't using hardware acceleration for the graphics in Nvidia 6100
onboard and HW acceleration is turned off.

So can I probably infer from this that somewhere around 3.0GHz (maybe a bit
less for Intel) is required to decode the H.264 stream, in software, without
skip loop filter? I have heard others here mention other issues such as
segfaults, but I am still looking to setup a myth box for Freeview|HD
eventually and don't mind just getting a grunty enough machine to do it, if
the requirements aren't too far out.

Andrew

On 9/15/08, Steven Ellis <steven at openmedia.co.nz> wrote:
>
>
> On 14/09/2008, at 7:10 PM, Andrew Richards wrote:
>
> Steve,
>
> It is a 5200 X2 (2.6GHz). It uses around 60% CPU on TV3 and is capable
> of 1080i playback using the PowerDVD8 codec under Windows.
>
>
> The 60% will be combined across the 2 CPUs so one core is running 100%. As
> ffmpeg's H.264 decoder still doesn't thread well enough it isn't going to
> use the other core to do enough decoding for playback to be smooth.
> PowerDVD's coded will either hardware accel or use both cores.
>
> Steve
>
>
>
> Andrew
>
> Steven Ellis wrote:
>
>
> On 14/09/2008, at 12:51 AM, Andrew Richards wrote:
>
>
> Hey all,
>
>
> I am bringing this topic back up as I have been working to apply the
>
> skiploopfilter patch, and after having gone through the process I
>
> still have skipping on TV3. So I would like to knwo if I have made
>
> the correct changes to the code, and how I can check that my new
>
> build has skiploopfilter applied.
>
>
> The details of what I have done are at TechReport
>
> <http://techreport.com/forums/viewtopic.php?f=7&t=61663> and my blog
>
> <http://www.geekzone.co.nz/amphibem>, here is a simplied version:
>
>
>
> Andrew - What spec is your CPU?
>
>
> Steve
>
>
>
> Steven Ellis - Technical Director
>
> OpenMedia Limited
>
> email   - steven at openmedia.co.nz <mailto:steven at openmedia.co.nz<steven at openmedia.co.nz>
> >
>
> website - http://www.openmedia.co.nz <http://www.openmedia.co.nz/>
>
>
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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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