Play video with audio only?

[glisignoli]

Is it possible to play a video file with audio only?
I tried setting the encoder to:
ffmpeg -i %s -ab %bk -vn -v 0 -f mp3 -

But I just get:
Video not found or access denied.

This would be a useful feature for listening to documentaries.

[GJ51]

This is a simple problem looking for a complicated answer.

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