bug#44275: [PATCH v2] gnu: Add python-pydub.

[Leo Famulari <leo@famulari.name>]

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On Thu, Oct 29, 2020 at 10:09:29AM +0100, Tanguy Le Carrour wrote:
> * gnu/packages/python-xyz.scm (python-pydub): New variable.

Thanks! Pushed as 96767739a1d2222ed802dd5dcfa2bda1df85df77

> +         (add-after 'unpack 'fix-ffmpeg-path
> +           (lambda* (#:key inputs #:allow-other-keys)
> +             (let ((ffmpeg (assoc-ref inputs "ffmpeg")))
> +               (substitute* '("pydub/utils.py")
> +                 (("return \"ffmpeg\"")
> +                  (string-append "return \"" ffmpeg "/bin/ffmpeg\""))
> +                 (("return \"ffplay\"")
> +                  (string-append "return \"" ffmpeg "/bin/ffplay\""))
> +                 (("return \"ffprobe\"")
> +                  (string-append "return \"" ffmpeg "/bin/ffprobe\""))
> +                 (("warn\\(\"Couldn't find ff") "# warn\\(\"Couldn't find ff"))
> +               #t))))))

This solution is more correct than the one I suggested. Thanks!

> +    (home-page "http://pydub.com")

I made this use HTTPS.

> +    (synopsis "Manipulate audio with an simple and easy high level interface")
> +    (description
> +     "@code{pydub} makes it easy to manipulate audio.  It relies on
> +@code{ffmpeg} to open various audio formats.")

And I tweaked these to avoid so-called "marketing language" and to
clarify that pydub is in Python, which I think can be useful when
searching for packages.

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