Add an option to see the ffmpeg command being called

[sdfg2]

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Is your feature request related to a problem? Please describe.
I'm not sure whether the -e options I'm sending to ffmpeg are getting eaten by ffmpeg-normalize or ffmpeg itself.

Describe the solution you'd like
Add the whole command being sent to ffmpeg, either via the -v switch or a new one.

[slhck]

Pass the -d option to see a detailed debug log.

[sdfg2]

Oops!