File M4a

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Paola020
Posts: 2
Joined: Thu Feb 11, 2021 1:34 pm
Operating System: Windows 10

File M4a

Post by Paola020 » Thu Feb 11, 2021 3:02 pm

Buongiorno, ho un problema con un file audio m4a, ho installato Audacity 2.4.2, Lame 3.99.3 e ffmpeg 2.2.2.
Quando apro il file mi appare la dicitura: "è un file advanced audio coding, Audacity non può aprire questo tipo di file senza la libreria facoltativa FFmpeg, eppure risulta installata.
Sapete dirmi come posso risolvere per favore?
Con la versione più vecchia di Audacity il file si apre normalmente solo che è molto rumoroso e per questo motivo ho pensato che fosse meglio avere la versione aggiornata.
Spero nel vostro aiuto.
Grazie

P.s. - sono molto inesperta e non ho mai usato Audacity ma ne ho necessità per utilizzare quel file.

DVDdoug
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Re: File M4a

Post by DVDdoug » Thu Feb 11, 2021 3:48 pm

To confirm FFmpeg is installed:

Edit -> Preferences -> Libraries and make sure you see "FFmpeg Library Version (F55, 33......)

If you're getting "pure noise" the file isn't getting decoded/decompressed properly. That might happen if it's not really an M4A file. If you get a very-short pure-noise file it's probably not getting decompressed at all. That will happen if you open a compressed file as "raw data".

FYI - LAME is not involved here. LAME is ONLY uses for creating/exporting-as MP3, and it's now built-into Audacity. It's not used for any other format and it's not used for opening/importing MP3s.

Paola020
Posts: 2
Joined: Thu Feb 11, 2021 1:34 pm
Operating System: Windows 10

Re: File M4a

Post by Paola020 » Thu Feb 11, 2021 4:44 pm

Grazie per la risposta,
Ho verificato e mando uno screen in allegato della schermata che mi appare.
Se ho capito non risulta installata FFmpeg, ma nella pagina che si apre cliccando su "scarica" non so su quale link devo cliccare.
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jademan
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Re: File M4a

Post by jademan » Fri Feb 12, 2021 2:21 pm

Paola020 wrote:
Thu Feb 11, 2021 4:44 pm
If I understand FFmpeg is not installed, but in the page that opens by clicking on "download" I do not know which link I have to click.
Go here: Installing FFmpeg for Windows

Note: As DVDdoug says, you do NOT need LAME.

I hope this helps. :D

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