Unplayable AAC file

[larley]

Hi all,
i downloaded and decrypted an AAC audio file. It looks like it should be playable (has file header, etc.) but neither ffmpeg nor VLC can play it.
I wasn't able to find anything online.

Help is greatly appreciated.

[El Heggunte]

You'd better tell us from where you downloaded it and how you decrypted it.
MediaInfo does not read it as an ADTS stream.

[larley]

The file is from Spotify in the 'AAC_24' format. The decryption is VERY complicated and uses AES.
If you really wanna know, look at this: https://github.com/librespot-org/librespot-java/discussions/421#discussioncomment-10037403

[El Heggunte]

Hummm, it appears your problematic file is a RAW .aac file, which is ""unplayable"" by nature or/and by definition

ffprobe does detect it as Advanced Audio Coding, but all the other info besides that is a mess

I tried to wrap it in an MP4 container with ffmpeg, but the program outputs a zero-byte MP4 file.

I also gave a try to GraphStudioNext, I managed to build various graphs, however none of the graphs generated an audible output.