download video/audio but need audio in aac

[vertex11]

I want to download a video/audio from youtube using youtube-dl. The file that is produced has an Opus audio which fails in my media player. I want the audio in aac. The downloaded video is fine.

How do I do this?

I tried:

youtube-dl --audio-format aac "URL"

But the downloaded file remains Opus audio, but I need aac

So, what syntax should I use?

[dstftw]

-f bestaudio[ext=m4a]+bestvideo[ext=mp4]/best[ext=mp4].