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Re: how to select part of old mp3 and create new one

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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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Thread

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

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