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how to select part of old mp3 and create new one

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  how to select part of old mp3 and create new one Long Wind <longwind2@yahoo.com> - 2019-02-07 08:10 +0100
    Re: how to select part of old mp3 and create new one mick crane <mick.crane@gmail.com> - 2019-02-07 09:40 +0100
      Re: how to select part of old mp3 and create new one <tomas@tuxteam.de> - 2019-02-07 10:00 +0100
        Re: how to select part of old mp3 and create new one Long Wind <longwind2@yahoo.com> - 2019-02-07 10:20 +0100
          Re: how to select part of old mp3 and create new one <tomas@tuxteam.de> - 2019-02-07 10:40 +0100
        Re: how to select part of old mp3 and create new one Nicolas George <george@nsup.org> - 2019-02-07 10:30 +0100
          Re: how to select part of old mp3 and create new one tomas@tuxteam.de - 2019-02-07 10:40 +0100
            Re: how to select part of old mp3 and create new one Jude DaShiell <jdashiel@panix.com> - 2019-02-07 18:40 +0100
              Re: how to select part of old mp3 and create new one tomas@tuxteam.de - 2019-02-07 18:50 +0100
                Re: how to select part of old mp3 and create new one Jude DaShiell <jdashiel@panix.com> - 2019-02-07 19:00 +0100
          Re: how to select part of old mp3 and create new one Long Wind <longwind2@yahoo.com> - 2019-02-07 11:00 +0100
    Re: how to select part of old mp3 and create new one Michael Lange <klappnase@freenet.de> - 2019-02-07 10:00 +0100
    Re: how to select part of old mp3 and create new one songbird <songbird@anthive.com> - 2019-02-07 12:20 +0100
      Re: how to select part of old mp3 and create new one Long Wind <longwind2@yahoo.com> - 2019-02-07 13:20 +0100
        Re: how to select part of old mp3 and create new one songbird <songbird@anthive.com> - 2019-02-07 13:50 +0100
      Re: how to select part of old mp3 and create new one Curt <curty@free.fr> - 2019-02-07 13:30 +0100
        (solved)Re: how to select part of old mp3 and create new one Long Wind <longwind2@yahoo.com> - 2019-02-07 13:50 +0100

#205078 — how to select part of old mp3 and create new one

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i want to copy part of old mp3 file and create a new oneat first, i install lame, but it doesn't seem to have such abilityi try mencoder, it doesn't eitherthen i try qmp3cut, it says "no valid header found"though i can play the mp3 file and it's OK
what should i do next? Thanks!

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#205080

On 2019-02-07 07:08, Long Wind wrote:
> i want to copy part of old mp3 file and create a new oneat first, i
> install lame, but it doesn't seem to have such abilityi try mencoder,
> it doesn't eitherthen i try qmp3cut, it says "no valid header
> found"though i can play the mp3 file and it's OK
> what should i do next? Thanks!

ffmpeg

don't have exact syntax to hand

-- 
Key ID    4BFEBB31

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#205081

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On Thu, Feb 07, 2019 at 08:33:15AM +0000, mick crane wrote:
> On 2019-02-07 07:08, Long Wind wrote:
> >i want to copy part of old mp3 file and create a new oneat first, i
> >install lame, but it doesn't seem to have such abilityi try mencoder,
> >it doesn't eitherthen i try qmp3cut, it says "no valid header
> >found"though i can play the mp3 file and it's OK
> >what should i do next? Thanks!
> 
> ffmpeg
> 
> don't have exact syntax to hand

ffmpeg's man page is pretty complete, but pretty daunting too. Here's
a command line to help jump-start things (corrections/enhancements
welcome):

  ffmpeg -i input.mp3 -ss 10 -t 20 -acodec mp3 output.mp3

This is assuming you want to have your result as .mp3 too (consider
a free codec like vorbis or flac, if you want lossless).

Here's a rundown of the above command line:

  -i input.mp3  -- the input file. Replace by "your" name

  -ss 10        -- the start time (in seconds). You can use a
                   duration in the hh:mm:ss.ffff format (cf.
                   man page ffmpeg-utils(1)

  -t 20         -- the duration (just leave it out if you want
                   copy all to the end). Format as above.

  -acodec mp3   -- the audio codec for output. See ffmpeg man
                   page for possibilities (audio & video codecs
                   have options of their own, lots of fun for
                   long winter afternoons :-)

  output.mp3    -- your desired output file name

Cheers
-- t

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#205086

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Thank tomas!i've just tested your command, it's OK
Thank crane and Michael too! 

    On Thursday, February 7, 2019 4:55 PM, "tomas@tuxteam.de" <tomas@tuxteam.de> wrote:
 

 On Thu, Feb 07, 2019 at 08:33:15AM +0000, mick crane wrote:
> On 2019-02-07 07:08, Long Wind wrote:
> >i want to copy part of old mp3 file and create a new oneat first, i
> >install lame, but it doesn't seem to have such abilityi try mencoder,
> >it doesn't eitherthen i try qmp3cut, it says "no valid header
> >found"though i can play the mp3 file and it's OK
> >what should i do next? Thanks!
> 
> ffmpeg
> 
> don't have exact syntax to hand

ffmpeg's man page is pretty complete, but pretty daunting too. Here's
a command line to help jump-start things (corrections/enhancements
welcome):

  ffmpeg -i input.mp3 -ss 10 -t 20 -acodec mp3 output.mp3

This is assuming you want to have your result as .mp3 too (consider
a free codec like vorbis or flac, if you want lossless).

Here's a rundown of the above command line:

  -i input.mp3  -- the input file. Replace by "your" name

  -ss 10        -- the start time (in seconds). You can use a
                  duration in the hh:mm:ss.ffff format (cf.
                  man page ffmpeg-utils(1)

  -t 20        -- the duration (just leave it out if you want
                  copy all to the end). Format as above.

  -acodec mp3  -- the audio codec for output. See ffmpeg man
                  page for possibilities (audio & video codecs
                  have options of their own, lots of fun for
                  long winter afternoons :-)

  output.mp3    -- your desired output file name

Cheers
-- t

   

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#205092

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On Thu, Feb 07, 2019 at 09:14:50AM +0000, Long Wind wrote:
> Thank tomas!i've just tested your command, it's OK

Thanks :-)

But see Nicolas's reply too: his version is probably faster
and its result will have better quality.

Cheers
-- tomás

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#205089

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tomas@tuxteam.de (12019-02-07):
>   ffmpeg -i input.mp3 -ss 10 -t 20 -acodec mp3 output.mp3

Since the original is already in MP3, -acodec copy (or -c:a copy, more
modern) will avoid re-encoding the file, and thus having the MP3
artifacts twice.

But if you want to recode, then do not put just a codec: you would get
the default quality parameters, and they probably do not suit you.
Specify the quality you want. RTFM for that.

Last: usually better to put -ss before -i, because it avoids decoding
the whole beginning of the file.

> This is assuming you want to have your result as .mp3 too (consider
> a free codec like vorbis or flac, if you want lossless).

Nowadays, Opus beats Vorbis easily.

Regards,

-- 
  Nicolas George

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#205091

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On Thu, Feb 07, 2019 at 10:19:39AM +0100, Nicolas George wrote:
> tomas@tuxteam.de (12019-02-07):
> >   ffmpeg -i input.mp3 -ss 10 -t 20 -acodec mp3 output.mp3
> 
> Since the original is already in MP3, -acodec copy (or -c:a copy, more
> modern) will avoid re-encoding the file, and thus having the MP3
> artifacts twice.

Yes, this is a very important point. More speed at more quality,
this is an offer one can't decline :-)

> But if you want to recode, then do not put just a codec: you would get
> the default quality parameters, and they probably do not suit you.
> Specify the quality you want. RTFM for that.

Yes. I just wanted to present a somewhat minimalist command line
to grow from.

> Last: usually better to put -ss before -i, because it avoids decoding
> the whole beginning of the file.

Nice little optimization, right. With videos and not-that-fast
hardware it'll make a noticeable difference, I guess.

> > This is assuming you want to have your result as .mp3 too (consider
> > a free codec like vorbis or flac, if you want lossless).
> 
> Nowadays, Opus beats Vorbis easily.

Thanks for the heads-up. I'm not that deep in codec land these days.

Thanks for your comments!

Cheers
-- tomás

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#205114

I wonder, would recoding the file put a proper header on any new file
created?  If not, do any tools exist capable of syntax checking an mp3
file with a missing header and then adding a proper header to that mp3
file?



--

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#205115

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On Thu, Feb 07, 2019 at 12:30:48PM -0500, Jude DaShiell wrote:
> I wonder, would recoding the file put a proper header on any new file
> created?  If not, do any tools exist capable of syntax checking an mp3
> file with a missing header and then adding a proper header to that mp3
> file?

Depending on what you (or your software) considers to be a "header":
If it's the ID3 stuff, then something like exiftool might do the
trick. If you mean /strictly/ MP3 headers, then MP3 seems to be
a multi-headed monster (each frame has a header [1], and I doubt any
frame would really make sense without one)

Cheers

[1] https://en.wikipedia.org/wiki/Mp3#File_structure
-- t

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#205116

On Thu, 7 Feb 2019, tomas@tuxteam.de wrote:

> Date: Thu, 7 Feb 2019 12:45:45
> From: tomas@tuxteam.de
> To: Jude DaShiell <jdashiel@panix.com>
> Cc: debian-user@lists.debian.org
> Subject: Re: how to select part of old mp3 and create new one
>
> On Thu, Feb 07, 2019 at 12:30:48PM -0500, Jude DaShiell wrote:
> > I wonder, would recoding the file put a proper header on any new file
> > created?  If not, do any tools exist capable of syntax checking an mp3
> > file with a missing header and then adding a proper header to that mp3
> > file?
>
> Depending on what you (or your software) considers to be a "header":
> If it's the ID3 stuff, then something like exiftool might do the
> trick. If you mean /strictly/ MP3 headers, then MP3 seems to be
> a multi-headed monster (each frame has a header [1], and I doubt any
> frame would really make sense without one)
>
> Cheers
>
> [1] https://en.wikipedia.org/wiki/Mp3#File_structure
> -- t
>
I wonder what file (1) has to say about longwind's old mp3 file?  Is file
more capable than that package longwind used and got no header error?


--

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#205094

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Thank Nicolas George!i've tested copy optionindeed it's faster than mp3 encoding.
 

    On Thursday, February 7, 2019 5:20 PM, Nicolas George <george@nsup.org> wrote:
 

 tomas@tuxteam.de (12019-02-07):
>  ffmpeg -i input.mp3 -ss 10 -t 20 -acodec mp3 output.mp3

Since the original is already in MP3, -acodec copy (or -c:a copy, more
modern) will avoid re-encoding the file, and thus having the MP3
artifacts twice.

But if you want to recode, then do not put just a codec: you would get
the default quality parameters, and they probably do not suit you.
Specify the quality you want. RTFM for that.

Last: usually better to put -ss before -i, because it avoids decoding
the whole beginning of the file.

> This is assuming you want to have your result as .mp3 too (consider
> a free codec like vorbis or flac, if you want lossless).

Nowadays, Opus beats Vorbis easily.

Regards,

-- 
  Nicolas George

   

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#205082

Hi,

On Thu, 7 Feb 2019 07:08:26 +0000 (UTC)
Long Wind <longwind2@yahoo.com> wrote:

> i want to copy part of old mp3 file and create a new oneat first, i
> install lame, but it doesn't seem to have such abilityi try mencoder,
> it doesn't eitherthen i try qmp3cut, it says "no valid header
> found"though i can play the mp3 file and it's OK what should i do next?
> Thanks!
> 

as Mick pointed out ffmpeg should be able to do this if you figure out
the suitable command line. If you prefer a gui, I think audacity should
be able to do this, and it might be easier to determine the desired start
and end points from a gui.

Regards

Michael


.-.. .. ...- .   .-.. --- -. --.   .- -. -..   .--. .-. --- ... .--. . .-.

Most legends have their basis in facts.
		-- Kirk, "And The Children Shall Lead", stardate 5029.5

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#205098

Long Wind wrote:
...
> i want to copy part of old mp3 file and create a new oneat first, i install lame, but it doesn't seem to have such abilityi try mencoder, it doesn't eitherthen i try qmp3cut, it says "no valid header found"though i can play the mp3 file and it's OK
> what should i do next? Thanks!

  not post in html...  :(


  that aside...

  does it have to be mp3 ?

  i convert all audios to flac before i do anything else
with them.

  pacpl will do conversions.

  once i have flac then i can edit with any audio editor
that does flac.  i like mhwaveedit.


  songbird

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#205101

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Thank songbird, i think mp3 is popular and supported by many devices, and it satisfy me, i've never heard flac before.
 

    On Thursday, February 7, 2019 7:10 PM, songbird <songbird@anthive.com> wrote:
 

 Long Wind wrote:
...
> i want to copy part of old mp3 file and create a new oneat first, i install lame, but it doesn't seem to have such abilityi try mencoder, it doesn't eitherthen i try qmp3cut, it says "no valid header found"though i can play the mp3 file and it's OK
> what should i do next? Thanks!

  not post in html...  :(


  that aside...

  does it have to be mp3 ?

  i convert all audios to flac before i do anything else
with them.

  pacpl will do conversions.

  once i have flac then i can edit with any audio editor
that does flac.  i like mhwaveedit.


  songbird



   

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#205105

Long Wind wrote:
...
> Thank songbird, i think mp3 is popular and supported by many devices, and i=
> t satisfy me, i've never heard flac before.

  mhwaveedit also works on mp3's...  i just checked.  :)


  songbird

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#205102

On 2019-02-07, songbird <songbird@anthive.com> wrote:
> Long Wind wrote:
> ...
>> i want to copy part of old mp3 file and create a new oneat first, i install lame, but it doesn't seem to have such abilityi try mencoder, it doesn't eitherthen i try qmp3cut, it says "no valid header found"though i can play the mp3 file and it's OK
>> what should i do next? Thanks!
>
>   not post in html...  :(
>
>
>   that aside...
>
>   does it have to be mp3 ?

It already is an old one.

>   i convert all audios to flac before i do anything else
> with them.
>
>   pacpl will do conversions.
>
>   once i have flac then i can edit with any audio editor
> that does flac.  i like mhwaveedit.

Another way to get from here to Rome:

'mpgtx'.

http://mpgtx.sourceforge.net/#Usage

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#205104 — (solved)Re: how to select part of old mp3 and create new one

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Thank Curt! 
but i'm happy with ffmpeg and have little incentive to try other

the command to extract and create new mp3:
 ffmpeg -ss 5 -i input.mp3  -t 346 -acodec copy output.mp3

 

    On Thursday, February 7, 2019 8:26 PM, Curt <curty@free.fr> wrote:
 

 On 2019-02-07, songbird <songbird@anthive.com> wrote:
> Long Wind wrote:
> ...
>> i want to copy part of old mp3 file and create a new oneat first, i install lame, but it doesn't seem to have such abilityi try mencoder, it doesn't eitherthen i try qmp3cut, it says "no valid header found"though i can play the mp3 file and it's OK
>> what should i do next? Thanks!
>
>  not post in html...  :(
>
>
>  that aside...
>
>  does it have to be mp3 ?

It already is an old one.

>  i convert all audios to flac before i do anything else
> with them.
>
>  pacpl will do conversions.
>
>  once i have flac then i can edit with any audio editor
> that does flac.  i like mhwaveedit.

Another way to get from here to Rome:

'mpgtx'.

http://mpgtx.sourceforge.net/#Usage






   

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