I am trying to decrypt an audio file in .m4a format I am using the correct key, but the file is not being decrypted. The same file in .aac format is decrypted using the same key, but as I said, it doesn't work in m4a format.

"audio578956  m4a        audio only [pt] DASH audio  128k , m4a_dash container, mp4a.40.2 (48000Hz)"

"mp4decrypt --key faxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:85xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx "test.m4a" "decrypt.aac"
or
"mp4decrypt --key faxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:85xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx "test.m4a" "decrypt.m4a"

Either way, the m4a file is not decrypted. Is there any solution?


mp4decrypt does not work with m4a audio files?
This is a GitHub Issue
repo:Bento4
owner:axiomatic-systems
Title : mp4decrypt does not work with m4a audio files?
Issue date:

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I am trying to decrypt an audio file in .m4a format I am using the correct key, but the file is not being decrypted. The same file in .aac format is decrypted using the same key, but as I said, it doesn't work in m4a format.

"audio578956  m4a        audio only [pt] DASH audio  128k , m4a_dash container, mp4a.40.2 (48000Hz)"

"mp4decrypt --key faxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:85xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx "test.m4a" "decrypt.aac"
or
"mp4decrypt --key faxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:85xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx "test.m4a" "decrypt.m4a"

Either way, the m4a file is not decrypted. Is there any solution?


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