Arch Linux

fabrixx

Member

From: Italy

Registered: 2015-06-07

Posts: 117

.m4a converted in .mp3

I noticed something that I can't explain.
I recorded an audio file with my smartphone's recorder and the format obtained is audio.m4a.

I sent the audio.m4a file with gmail to my address and downloaded it to the PC with Arch Linux.

Once the file is downloaded, it is renamed audio.mp3

The codec features are the same and I was wondering why GNOME makes this renaming.

seth

Member

Registered: 2012-09-03

Posts: 60,298

Re: .m4a converted in .mp3

I sent the audio.m4a file with gmail to my address and downloaded it to the PC with Arch Linux.

Once the file is downloaded, it is renamed audio.mp3 The codec features are the same

Downloaded it with what on your PC? Some mail client? gmail web interface in a browser?

Why do you think "gnome" renamed anything there?
When downloading anything you typically get a dialog to select the destination and then also a name (incl. the suffix, which is a DOS relic and technically meaningless, though helps w/ filtering ls
What path and filename did you get offered? Was the preset filename changed there as well?

If the codec didn't change the file wasn't "converted" btw.

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ua4000

Member

Registered: 2015-10-14

Posts: 491

Re: .m4a converted in .mp3

let's have a look:

file audio.mp3

Maniaxx

Member

Registered: 2014-05-14

Posts: 757

Re: .m4a converted in .mp3

You can also verify the codec with 'mediainfo' or 'ffprobe'.

And if you might want to get something more convenient and privacy related than sending by email i would recommend 'mixplorer' (see xda) that allows to open several 'servers' to access your data directly.

Last edited by Maniaxx (2023-11-26 10:23:30)

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sys2064

fabrixx

Member

From: Italy

Registered: 2015-06-07

Posts: 117

Re: .m4a converted in .mp3

I directly download the attachment from Gmail web and save it. The file becomes mp3
In my phone file Explorer i can confirm there is mp4a.

Maybe is the same code aac in same container i dont know but in curious about this renaming...

seth

Member

Registered: 2012-09-03

Posts: 60,298

Re: .m4a converted in .mp3

When downloading anything you typically get a dialog to select the destination and then also a name (incl. the suffix, which is a DOS relic and technically meaningless, though helps w/ filtering ls wink
What path and filename did you get offered? Was the preset filename changed there as well?

Maybe is the same code aac in same container i dont know

You can also verify the codec with 'mediainfo' or 'ffprobe'.

mpv will also tell you in the console output.

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tdtooke

Member

Registered: 2023-04-11

Posts: 200

Re: .m4a converted in .mp3

This takes me back to the old days.  M4a 99% of the time is AAC in an mp4 container, but you can put all sorts of things into that really, most people don't.  I don't really have anything to add, everybody else pretty much covered it.