Mp3 not supported by Whisper?

Hi everyone!
I’ve created a flow for transcribing files from Telegram.

When I send an audio file recorded on my phone’s voice recorder to the bot, everything works fine — the file is sent as m4a and transcribed successfully.
But when my friend sends a file from his phone, it somehow comes through as mp3, and Whisper OpenAI returns the error:
“Audio file might be corrupted or unsupported.”

Doesn’t Whisper support MP3?
Both phones are iPhones.
I’m using the gpt-4o-transcribe-diarize model.

Here is file data
File Name:
file_18.mp3
File Extension:
mp3
Mime Type:
audio/mpeg
File Size:
53.9 kB

Hi @Aidyn, welcome!

Yes, according to their docs

It might be what they mention, the file could be “corrupted”

Could you try the problem mp3 file without the Telegram “get file” node?
If it works, then Telegram might be modifying the file somehow or how the file get uploaded/recorded, not sure just a thought..