EXIF FNumber is printed in an unexpected form

[Fethbita]

When using the following shortcode:

  {{ range $index, $image := (sort (resources.Match (.Get 0)) "Exif.Date" "desc") }}
    <figure>
    <img src="{{ $image.RelPermalink }}" alt="{{ $image.Exif.Tags.ImageDescription }}">
    {{ $image_properties := printf "%s sec, f/%s, ISO %d"  $image.Exif.Tags.ExposureTime $image.Exif.Tags.FNumber $image.Exif.Tags.ISO }}
    <figcaption>{{ $image_properties }}</figcaption>
    </figure>
  {{ end }}

The result is unexpected. For FNumber 3.6, 18/5 is shown:

If the FNumber is printed with format string %f, the following appears instead:

1/2000 sec, f/&{%!f(uint32=18) %!f(uint32=5)}, ISO 160

I think it might be related to #12651.

What version of Hugo are you using (hugo version)?

$ hugo version
hugo v0.131.0+extended

Does this issue reproduce with the latest release?

Yes

[bep]

Thanks for the report. I will try to improve the printf support for the rat type in the new imagemeta library.

What you can try as a workaround is something like:

$f := $image.Exif.Tags.FNumber.Float64
// ... format it with %f

[Fethbita]

Yup, the workaround works:

    {{ $aperture := $image.Exif.Tags.FNumber.Float64 }}
    {{ $image_properties := printf "%s sec, f/%.1f, ISO %d"  $image.Exif.Tags.ExposureTime $aperture $image.Exif.Tags.ISO }}

Thank you for the quick response.

[github-actions]

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