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

[Andrew Richards]

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:

1) Got the source of '0.21.0+fixes18254+ffmpeg15219+latm-0pk1' and changed
/libs/mythtv/avformatdecoder.cpp around line 1588 to

if (CODEC_ID_H264 == enc->codec_id)
{
VERBOSE(VB_PLAYBACK, LOC + "Turning off loop
filter");
enc->skip_loop_filter = AVDISCARD_ALL;
}

I now notice one of the other threads Steve Ellis had something similar, but
with some added code

VERBOSE(VB_PLAYBACK, LOC + "Enabling Fast decode
mode");
enc->flags |= CODEC_FLAG2_FAST;

I will add then when I do this again.

2) After that went through and did all the rebuilding then re-installing
stuff. Got message about version numbers and not being the maintainer but as
far as I can tell it all worked. However TV3 has not improved. So can I
check somewhere that the change in the code was affected? Or actually check
the skiploopfilter is enabled?

Regards,

Andrew

On 8/24/08, Andrew Richards <amphibem at gmail.com> wrote:
>
> OK thanks for all you have done, I will keep an eye out for those changes.
>
> Paul Kendall wrote:
>
>> On Sunday 24 August 2008 09:48:01 Andrew Richards wrote:
>>
>>
>>> OK that may be beyond my Linux foo, will come back to this after I get
>>> my primary PVR MediaPortal working again.
>>>
>>> Cheers for your help
>>>
>>>
>>
>> Sure thing.
>> I may actually look at having a way to configure this in the UI as I think
>> other people are going to need it. i.e. the Norwegians and the UK ITV
>> people.
>>
>> Paul
>>
>>
>>> Andrew
>>>
>>> Paul Kendall wrote:
>>>
>>>
>>>> On Sunday 24 August 2008 08:40:38 Andrew Richards wrote:
>>>>
>>>>
>>>>> Sorry what source are you refering to? I have your patches applied from
>>>>> your repository already, that part is working fine.
>>>>>
>>>>>
>>>> Ok, if you have the sources from my repository then the file you need to
>>>> edit in in there under 'libs/libmythtv/avformatdecoder.cpp'.
>>>>
>>>> You then need to rebuild the whole thing.
>>>>
>>>> Paul
>>>>
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