[FFmpeg-user] Audio filter: removesilence doesn't appear to do anything

[DopeLabs]

well the only thing that looks odd to me is you have an h264 video stream in your 'mpeg 4 audio' file. (.m4a)

have you tried extracting the audio or converting to uncompressed and running the same command?



> On Sep 24, 2017, at 11:23 44PM, Quinn Wood <mtcjayne at gmail.com> wrote:
> 
> https://pastebin.com/raw/KGVTRVsR
> 
> On Mon, Sep 25, 2017 at 1:19 AM, DopeLabs <dopelabs at dubstep.fm> wrote:
>> please provide the complete un-truncated console output
>> 
>> 
>>> On Sep 24, 2017, at 10:59 13PM, Quinn Wood <mtcjayne at gmail.com> wrote:
>>> 
>>> I have used the following command
>>>   ffmpeg -i input.m4a -af silenceremove=0:0:0:-1:0.5:-20dB output.m4a
>>> 
>>> on a file. When I use another tool (Audacity) to truncate periods over
>>> 0.5 seconds of under -20dB volume it removes upwards of an hour from
>>> the input file. When I run this command ffmpeg doesn't remove a single
>>> second. I have tried numerous variations of the command and numerous
>>> input files, and am simply unable to replicate the effect Audacity is
>>> producing.
>>> 
>>> The input files have a period of silence at the beginning that is
>>> predictable, intermittent periods of silence throughout the file of
>>> unknown quantity and length, and a period of silence at the end that
>>> is predictable.
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>> 
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