Add -width auto option

[xeruf]

I would like a flag -width auto that generates a waveform with sufficient width to cover the whole track.
Since I am using this tool to inspect audio at a glance it is handy to see its length from the width of the waveform.

[xeruf]

Currently I am emulating it by setting an absurdly high width and fitting the --axis-label-color to the background color

[chrisn]

Yes, this sounds like a good feature to add.

[DomingoMG]

You know something?

[xeruf]

Just to give you an idea, this is what I am using it for, and it is amazing you made that possible ;)
https://git.jfischer.org/xeruf/dotfiles/src/branch/main/.local/bin/scripts/b

[xeruf]

Any chance for progress on this? :)

[chrisn]

Sorry, I haven't been able to look at this yet