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

[Mailing List SVR]

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

>>
>> 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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