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Conversion m4a -> mp4 ???
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Bonjour,
J'ai un fichier son de type .m4a dans mon Drive
Après l'avoir télécharger sur mon PC windows 10 avec Firefox il est automatiquement convertir en .mp4 :

Que se passe-t-il ? Y a-t-il un paramètre à changer ?
Merci de votre aide
Dan
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Hanging out since 2017
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Hi Daniel Weber, both of those extensions are kind of the same thing meaning both for audio files however mp4 can include video. 

I see online that m4a extensions are typically for Apple QuickTime. Microsoft Windows is not an Apple device so probably to read the files, they changed it to an extension they can read and see which mp4 is typically something that can be read by Microsoft Windows devices.
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Hello Penelope and thank you for your response. OK but why did it work so well a few days ago and now no? Has anything been changed in Drive ?
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Hanging out since 2017
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Hi Daniel, I will ask around for you. When you were downloading the m4a files several days ago, was that onto the device you are using right now so the Windows 10? 
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I am looking to check your conversion rate to modify it in a better way so kindly share some details here.
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Hanging out since 2017
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Hi Daniel,
 
Some questions for you:
 
How did you upload the file (via Drive web? Drive mobile? Some other pathway)?
How did you download the file (via Drive web? etc.)? (I believe you said it was on Windows 10 laptop just to reconfirm?)
Do they have a same file ID?
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Thank's
How did you download the file (via Drive web? etc.)? YES via Drive web
(I believe you said it was on Windows 10 laptop just to reconfirm?) YES
Do they have a same file ID? the same a same file ID but change the extention !!!


puis Télécharger (Download) and :



???????????????????????
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Hanging out since 2017
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Hi Daniel, thank you for the information and the screenshot. I have passed it along to my colleague who wanted the answers to those questions.
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Hanging out since 2017
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Hey Daniel,

I heard back from the colleague who said that it is possible for the browser/device/Drive to detect what format would be more usable on the final destination (Windows in this case).

But to figure that out to see what is going on....

What happens if you download the file inside of another browser? Does it change to the mp4 extension?
What happens if you download the file when there are no extensions/add-ons in the Firefox browser turned on? Does it change to the mp4 extension?
What happens if you download the file in Firefox in-private browsing? Does it change to the mp4 extension?
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Hanging out since 2017
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Another question for you Daniel:
 
When you are inside of drive.google.com,
highlight the file (so tap it once)
click on the ! inside of a circle (which then the details will pop up)
hover over the format to the right of the word "type"
What does that say? 
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