error calling Exif: metadata init failed: json: unsupported value: NaN

[khimaros]

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

$ hugo version
hugo v0.111.3+extended linux/arm BuildDate=2023-03-16T08:41:31Z VendorInfo=raspbian:0.111.3-1

Does this issue reproduce with the latest release?

i'm not sure, but seems likely given #8996 and #8586

description

this template results in failure on some images. it's difficult to determine which images are failing because

{{ range sort .Resources ".Name" "asc" }}
  <u>{{ .Name }}</u>
  {{ if eq .ResourceType "image" }}
    {{ $image := .Resize "1024x" }}
    <img src="{{ $image.RelPermalink }}" alt="{{ .Name }}"/>
    <div class="image-metadata">
      {{ .Exif }}
    </div>
  {{ end }}
{{ end }}

i was able to determine the specific image this is failing on and the data looks fine using the exif command line tool. all photos were all taken using Google Camera on a Pixel 6 phone.

is there a way to detect or somehow "catch" this error in my templates? it's fine if the data is blank for some images.

[jmooring]

Can you share the original image?

[khimaros]

i believe this is the one that is failing (added some warnf to the template and this is consistently the last one logged before failure)

[khimaros]

when i move this image out of the way, it still fails on another. it seems like some images work, but quite a few fail.

[jmooring]

There appears to be something wrong with the GPSInfo:

$ exiftool assets/images/a.jpg | grep GPS

GPS Version ID                  : 0.0.0.0
GPS Latitude Ref                : Unknown ()
GPS Longitude Ref               : Unknown ()
GPS Altitude Ref                : Above Sea Level
GPS Time Stamp                  : 00:00:00
GPS Img Direction Ref           : Unknown ()
GPS Img Direction               : undef
GPS Date Stamp                  : 
GPS Date/Time                   :  00:00:00Z
GPS Latitude                    : 
GPS Longitude                   : 

This fixes it...

$ exiftool -GPSLatitude= assets/images/a.jpg

... but removing GPSLongitude fixes it as well, so maybe exiftool cleans up the whole GPSInfo block when updating any of its tags.

Other than updating the image, I don't know of a way around this in Hugo.

[jmooring]

Correction: if you're willing to live without GPS data on all of your photos, you can do this in your site configuration:

[imaging.exif]
disableLatLong = true

[jmooring]

I've tested this, and we can fix by changing this:

hugo/resources/images/exif/exif.go

Lines 141 to 143 in ee26e69

	if !d.noLatLong {
	lat, long, _ = x.LatLong()
	}

To this:

if !d.noLatLong {
	lat, long, _ = x.LatLong()
	if math.IsNaN(lat) {
		lat = 0
	}
	if math.IsNaN(long) {
		long = 0
	}
}

It seems like setting the values to 0 is better than throwing an error that you can't work around unless you disable lat/long site wide.

Reproducible example:

git clone --single-branch -b hugo-github-issue-12490 https://github.com/jmooring/hugo-testing hugo-github-issue-12490
cd hugo-github-issue-12490
hugo server

[github-actions]

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