gstreamr-bad-plugin: remove silence adding "pre-length"

[Sagar]

Mailing List SVR wrote
> Il 24/03/2016 09:59, Sagar ha scritto:
>> Mailing List SVR wrote
>>> Il 24/03/2016 08:03, Sagar ha scritto:
>>>> Hi,
>>>>
>>>> I am currently working on "removesilence" bad plugin, I have applied
>>>> path
>>>> provided by Nicola  https://bugzilla.gnome.org/show_bug.cgi?id=671954
>>>> <https://bugzilla.gnome.org/show_bug.cgi?id=671954>
>>>>
>>>> using Nicola's patch we get the audio buffer as message callbacks, but
>>>> I
>>>> have noticed that for some small non-silent buffers to we are getting
>>>> bus
>>>> callback.
>>>>
>>>> I was thinking of adding one more property called *"pre-length"*
>>>> inspired
>>>> bu
>>>> *cutter* element.
>>> not sure if I have correctly understand what you mean, after applying my
>>> patch you can specify:
>>>
>>> - My concern is that the non silent buffer which we receive are
>>> sometimes
>>> noise, I am using pulsesrc as an input and if there is background noise
>>> even for fraction of second I get
>> /
>>> silence_finished
>> /
>>>   message
>>>
>>>
>>> - minimum-silence-buffers or minimum-silence-time before detect silence
>>> - get notified on the bus when silence is detected/not detected
>>> - retimestamp when silence is detected/removed
>>>
>>> additionally you can specify the detection hysteresis too, this value is
>>> applyed before minimum-silence-buffers/minimum-silence-time
>>>
>>> - can you please explain what
>> *
>>> detection hysteresis
>> *
>>>   mean in simple words, I didnt understand what it is.
> 
> 
> seems what you need, try to increase hysteresis,
> 
> when a non silence sample is detected (based on the dB threshold) if 
> consecutive non silence samples exceed the hysteresis then silence is 
> considered finished,
> 
> Nicola
> 
> 
> - Thanks, 

>  I increased hysteresis it worked like a charm on prerecored videos and
> audios but if I pass source as pulse src there is a lot on noise in the
> output... I will try using it inside kurento server where i intend to use
> it.
> 
>>>
>>> is the plugin detecting silence for non silence buffers? Can you please
>>> share an audio sample and indicate the pipeline you used, what you
>>> expect and what you get?
>>>
>>> plugin is not detecting silence for non silence buffer but when there is
>>> a
>>> small amount of noise I am getting silence_finished message which is
>>> correct BUT I want to ignore this non-silent buffer as it is noise.
>>>
>>> thanks
>>> Nicola
>>>
>>>> I want to know what all scenarios should be considered and how can I
>>>> make
>>>> sure to properly add "pre-length" property
>>>>
>>>>
>>>>
>>>>
>>>> --
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>>
>>
>>
>>
>> --
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