[mythtvnz] reasonably effective commercial detection silence.preset for NZ?

[Karl]

Yes it was mythcommflag. All good. Ta

On Mon, 7 May 2018, 19:24 James Walker, <james.walker.nz at me.com> wrote:

> Karl - just to be clear are you using the normal mythcomflag process?  Or
> the silence detection system per the wiki page I linked in my earlier email?
>
> If you are still on mythcommflag then it will be pretty intensive as its
> scrubbing through the video frames looking for various things.   As Nick
> noted the Silence detection system is looking only at the sound stream.
> Much lighter weight to process.
>
>
> On 7/05/2018, at 5:25 PM, Karl <skooobie at gmail.com> wrote:
>
> I hear what you are saying and I agree. When I saw my CPU going through
> the roof I saw the job running as ad detection and when I disabled it my
> CPU went right down to normal. Strange. SO I have always thought this was a
> CPU intensive thing,. I noted the jobs ran after the recording completed
> and it redid those until I disabled the detection. Anyways I am happy
> enough to give it another go now as I am setting up new mythtv on 18.04.
>
> On 7 May 2018 at 15:19, Nick Rout <nick.rout at gmail.com> wrote:
>
>> Silence detection is not CPU intensive as it involves no video decoding.
>>
>>
>> On Mon, May 7, 2018 at 2:59 PM, James Walker <james.walker.nz at me.com>
>> wrote:
>>
>>> The tooling I have setup is per this wiki page:
>>> https://www.mythtv.org/wiki/Commercial_detection_with_silences
>>>
>>> The processing seems to be reasonably light weight and pretty fast. I do
>>> have a quad core backend master sever that just shrugs when 2 such jobs are
>>> processing.  However on older kit I can see how it might be more pushed.
>>>
>>> As to effectiveness - the wiki page “advertises” it as working/workable
>>> in NZ, hence my question to the community.  However having analysed some of
>>> the shows on various channels I can see how tough it will be to get
>>> consistent “okay” results. The methods for fading between shows and
>>> commercials are all over the place.
>>>
>>> I’ve been using the skip facilities for years so no issue returning to
>>> that.  I was just hoping to achieve some processing magic  :-)
>>>
>>> Cheers,
>>> James.
>>>
>>> On 7/05/2018, at 2:46 PM, Karl <skooobie at gmail.com> wrote:
>>>
>>> Yep. The commercial detection is very processed hungry. And as Stephen
>>> mentions as we have skip ability (which we can fine tune too) then no real
>>> need anyway.
>>>
>>> On Mon, 7 May 2018, 14:17 Stephen Worthington, <stephen_agent at jsw.gen.nz>
>>> wrote:
>>>
>>>> On Mon, 7 May 2018 08:35:23 +1200, you wrote:
>>>>
>>>> >On 06/05/18 20:16, Stephen Worthington wrote:
>>>> >> I have
>>>> >> just given up and turned it off so as not to waste all the CPU cycles
>>>> >> and electricity it was using, as it never worked.
>>>> >Where do you turn it off?
>>>>
>>>> Mythtv-setup > General > Job Queue (Backend-Specific) > Allow advert
>>>> detection jobs
>>>>
>>>> MariaDB [mythconverg]> select * from settings where
>>>> value='JobAllowCommFlag';
>>>> +------------------+------+----------+
>>>> | value            | data | hostname |
>>>> +------------------+------+----------+
>>>> | JobAllowCommFlag | 0    | mypvr    |
>>>> +------------------+------+----------+
>>>> 1 row in set (0.00 sec)
>>>>
>>>> I also changed my recording templates to turn off the option in there
>>>> that creates the mythcommflag job, and used SQL to do the same in all
>>>> my recording rules.
>>>>
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