add whatsapp audio formats to convert to mp3

[akamuraaa]

i noticed that whatsapp gives me several different formats by downloading audio files, but i want to convert them to mp3.
so far i saw .dat.unknown and .whaptt.opus

[C4illin]

Opus should be supported .dat.unknown sounds very weird, do you now what if is?

[akamuraaa]

This a file created by the Android MediaRecorder. Header contains ftypmp42 isommp42.
I don't know what this means, but i hope it's helpful.

[akamuraaa]

Also i notice .whaptt.opus works already

[C4illin]

Do you have a sample file for .dat.unknown?

[akamuraaa]

yes, i can't upload it here, so i have to use wetransfer.
https://we.tl/t-8pVwEK9xl4

[C4illin]

This seems to be a aac file. I can add so that it detects it as aac, but it will make all .unknown detect as aac, what do you think?

[akamuraaa]

if this works, of course.
maybe whatsapp uses this .dat.unknown to compress files. my phone records in .m4a files. so this should work for all .dat.unknown files from whatsapp.