[gentoo-user] [OT] splitting audio file at points of silence ?

[gentoo-user] [OT] splitting audio file at points of silence ?

[tuxic]

Hi,

I want to split an audio file containing crow calls at points
where no crow call is. The "silence" in between is not exactly
"silence" but some low level noise.

Searching the internet for "split audio at silence" and similiar
gives me this link
https://unix.stackexchange.com/questions/318164/sox-split-audio-on-silence-but-keep-silence

which uses a program called "silence" to detect the silence.

Unfortunately I can't figure out, what package contains that program
or from where I can download that program.

The input audio is a flac file  and I don't want to convert this into
any lossy audio format to preserve as much as possible of the signal.

Where can I get this program ?

or

How can I split an audio file at points of defineable 
level of "silence" into several audio files in one go?


Cheers!
Meino

Re: [gentoo-user] [OT] splitting audio file at points of silence ?

[Dale]

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tuxic@posteo.de wrote:
> Hi,
>
> I want to split an audio file containing crow calls at points
> where no crow call is. The "silence" in between is not exactly
> "silence" but some low level noise.
>
> Searching the internet for "split audio at silence" and similiar
> gives me this link
> https://unix.stackexchange.com/questions/318164/sox-split-audio-on-silence-but-keep-silence
>
> which uses a program called "silence" to detect the silence.
>
> Unfortunately I can't figure out, what package contains that program
> or from where I can download that program.
>
> The input audio is a flac file  and I don't want to convert this into
> any lossy audio format to preserve as much as possible of the signal.
>
> Where can I get this program ?
>
> or
>
> How can I split an audio file at points of defineable 
> level of "silence" into several audio files in one go?
>
>
> Cheers!
> Meino
>

It doesn't look good.  Either it isn't available or no one who has it
installed uses pfl.  It finds this but I don't think it is what you want. 

http://www.portagefilelist.de/site/query/listPackageVersions/?category=net-irc&package=irssi&do#result

Mostly replying so that you can check out the pfl tool.  It helps
sometimes to find out where a command comes from.  It's handy at times. 

Dale

:-)  :-)

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Re: [gentoo-user] [OT] splitting audio file at points of silence ?

[Ashley Dixon]

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On Sun, Jun 14, 2020 at 10:19:05AM +0200, tuxic@posteo.de wrote:
> Searching the internet for "split audio at silence" and similiar
> gives me this link
> https://unix.stackexchange.com/questions/318164/
> 
> which uses a program called "silence" to detect the silence.
> 
> Unfortunately I can't figure out, what package contains that program
> or from where I can download that program.

There is no binary in Portage providing the binary "silence":

        $ e-file silence

        *  net-irc/irssi
               Available Versions:	1.0.0 1.0.7 1.2.1 1.2.2 
               Homepage:		https://irssi.org/
               Description:		A modular textUI IRC client with IPv6
                                        support
               Matched Files:		/usr/share/irssi/help/silence;

However, there is `mp3splt`,  provided  in  the  package  `media-sound/mp3splt`.
It's described in the question provided as a comment to your  UNIX  S.E.\  link.
[1]

> The input audio is a flac file  and I don't want to convert this into
> any lossy audio format to preserve as much as possible of the signal.

mp3splt primarily works with mp3s, but can also support  ogg,  which  can  be  a
container format for flac.  I've never used it myself, but it  looks  promising,
providing you are OK with placing your flacs inside an ogg.

Hope this helps.

[1] https://askubuntu.com/questions/27574

-- 

Ashley Dixon
suugaku.co.uk

2A9A 4117
DA96 D18A
8A7B B0D2
A30E BF25
F290 A8AA


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Re: [gentoo-user] [OT] splitting audio file at points of silence ?

[tuxic]

Hi Dale, hi Ashley,

thanks for all the help and informations! :)

In the meanwhile I found another way to split that file "as is"
(flac remains flac) with audacity.

Audacity contains a "sound finder" and "silence finder" analysis
tool, with which it is possible to set marks/regions in the file,
which mark sound and silence.

The tools are configurable. This way one can tinker with the
parameters until a near perfect match as acchieved and then
write out the files with File->Export->Multiple.

The visual representation of sound and silence is by far better
then test-listening all created files after each iteration with
any cli solution.

Cheers!
Meino




On 06/14 09:43, Ashley Dixon wrote:
> On Sun, Jun 14, 2020 at 10:19:05AM +0200, tuxic@posteo.de wrote:
> > Searching the internet for "split audio at silence" and similiar
> > gives me this link
> > https://unix.stackexchange.com/questions/318164/
> > 
> > which uses a program called "silence" to detect the silence.
> > 
> > Unfortunately I can't figure out, what package contains that program
> > or from where I can download that program.
> 
> There is no binary in Portage providing the binary "silence":
> 
>         $ e-file silence
> 
>         *  net-irc/irssi
>                Available Versions:	1.0.0 1.0.7 1.2.1 1.2.2 
>                Homepage:		https://irssi.org/
>                Description:		A modular textUI IRC client with IPv6
>                                         support
>                Matched Files:		/usr/share/irssi/help/silence;
> 
> However, there is `mp3splt`,  provided  in  the  package  `media-sound/mp3splt`.
> It's described in the question provided as a comment to your  UNIX  S.E.\  link.
> [1]
> 
> > The input audio is a flac file  and I don't want to convert this into
> > any lossy audio format to preserve as much as possible of the signal.
> 
> mp3splt primarily works with mp3s, but can also support  ogg,  which  can  be  a
> container format for flac.  I've never used it myself, but it  looks  promising,
> providing you are OK with placing your flacs inside an ogg.
> 
> Hope this helps.
> 
> [1] https://askubuntu.com/questions/27574
> 
> -- 
> 
> Ashley Dixon
> suugaku.co.uk
> 
> 2A9A 4117
> DA96 D18A
> 8A7B B0D2
> A30E BF25
> F290 A8AA
> 

Re: [gentoo-user] [OT] splitting audio file at points of silence ?

[David Haller]

Hello,

On Sun, 14 Jun 2020, tuxic@posteo.de wrote:
>I want to split an audio file containing crow calls at points
>where no crow call is. The "silence" in between is not exactly
>"silence" but some low level noise.
>
>Searching the internet for "split audio at silence" and similiar
>gives me this link
>https://unix.stackexchange.com/questions/318164/sox-split-audio-on-silence-but-keep-silence
>
>which uses a program called "silence" to detect the silence.
>
>Unfortunately I can't figure out, what package contains that program
>or from where I can download that program.

You need 'media-sound/sox' and then use the silence effect. Note that
it is _one_ command on _one_line in that answer on stackexchange

sox -V3 audiobook.mp3 audiobook_part_.mp3 silence \
    1 0.5 0.1% 1 0.5 0.1% : newfile : restart

See 'man 7 soxeffect'

HTH,
-dnh

-- 
Ich glaube aber nicht, dass der DDR Ram hat. Er hat seinen Rechner doch erst
vor einem Jahr gekauft! Die werden Ihm da doch nicht uralt-Speicherbausteine
hereingesteckt haben. Maximal kann er also "Ex-DDR"-Speicher haben (Sprich
Infineon, denn die Produzieren ja auch in Dresden ...).    -- Konrad Neitzel

Re: [gentoo-user] [OT] splitting audio file at points of silence ?

[tuxic]

On 06/14 11:45, David Haller wrote:
> Hello,
> 
> On Sun, 14 Jun 2020, tuxic@posteo.de wrote:
> >I want to split an audio file containing crow calls at points
> >where no crow call is. The "silence" in between is not exactly
> >"silence" but some low level noise.
> >
> >Searching the internet for "split audio at silence" and similiar
> >gives me this link
> >https://unix.stackexchange.com/questions/318164/sox-split-audio-on-silence-but-keep-silence
> >
> >which uses a program called "silence" to detect the silence.
> >
> >Unfortunately I can't figure out, what package contains that program
> >or from where I can download that program.
> 
> You need 'media-sound/sox' and then use the silence effect. Note that
> it is _one_ command on _one_line in that answer on stackexchange
> 
> sox -V3 audiobook.mp3 audiobook_part_.mp3 silence \
>     1 0.5 0.1% 1 0.5 0.1% : newfile : restart
> 
> See 'man 7 soxeffect'
> 
> HTH,
> -dnh
> 
> -- 
> Ich glaube aber nicht, dass der DDR Ram hat. Er hat seinen Rechner doch erst
> vor einem Jahr gekauft! Die werden Ihm da doch nicht uralt-Speicherbausteine
> hereingesteckt haben. Maximal kann er also "Ex-DDR"-Speicher haben (Sprich
> Infineon, denn die Produzieren ja auch in Dresden ...).    -- Konrad Neitzel
> 


Hi dnh,

Oh......<"hand against my forhand"-effect>

For me:
Lesson 1: Reading

;)

Thanks a lot for your help!

Cheers!
Meino