Cannot extract audio from video with fancy characters in its name

[giacomodrago]

This does not work:
youtube-dl --extract-audio --audio-format mp3 http://www.youtube.com/watch?v=ZV0Ks4cujNU

(ERROR: WARNING: unable to obtain file audio codec with ffprobe)

whereas this does:
youtube-dl -o asd.mp4 --extract-audio --audio-format mp3 http://www.youtube.com/watch?v=ZV0Ks4cujNU

I am on Microsoft Windows 7 x64, latest version of youtube-dl.

[giacomodrago]

I was using the youtube-dl Windows executable I found on the project's website.
Now I actually cloned the repository, and run the program with python from the command line. I get different results with Python 2 and Python 3, that is the former does not work, the latter does. So if you are embedding Python 2 in the Windows executable, youtube-dl is not able to download that video, I guess because it has odd fancy symbols in its name.

[l3uddz]

Use --restrict-filenames allows it to work

[giacomodrago]

I know various workarounds, but I think the application should either: 1) fail with a proper error message ("use --restrict-filenames please"); or 2) auto-engage --restrict-filenames emitting a warning.
Anyway, it shouldn't do different stuff in Python 2 and 3, or this should be documented. Generic failure with catch-all reason is bad, AFAIK.