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Aptfile

Buildpack

Results

1

Code Block
libvips-tools
mediainfo
imagemagick
poppler-utils
Code Block
heroku-community/apt
heroku/ruby

vips-8.9.1-Sun Feb 23 08:51:26 UTC 2020

Color TIFFs work

B&W TIFFs do not work

PDFs work

2

Code Block
libvips-tools
mediainfo
imagemagick
poppler-utils
Code Block
heroku-community/apt
heroku/ruby

vips-8.9.1-Sun Feb 23 08:51:26 UTC 2020
PDFs work

All TIFFS work

Removing --eprofile srgb_profile_path from the arguments to vipsthumbnail in the code (docs) avoids the error described in issue 942.

3

Code Block
mediainfo
imagemagick
poppler-utils
Code Block
heroku-community/apt
https://github.com/machinio/heroku-buildpack-vips
heroku/ruby

vips-8.10.2-Mon Oct 12 16:43:59 UTC 2020

At some point in 2021, vips -l | grep -i pdf started returning blank - no poppler support, so PDFs don’t work.

All TIFFS work

4

Code Block
mediainfo
imagemagick
libglib2.0-0
libglib2.0-dev
libpoppler-glib8
Code Block
heroku-community/apt
https://github.com/brandoncc/heroku-buildpack-vips
heroku/ruby

vips-8.10.6-Tue Mar 23 20:52:58 UTC 2021

PDFs work

All TIFFS work

Combined audio derivatives don’t work

5

Code Block
mediainfo
imagemagick
libglib2.0-0
libglib2.0-dev
libpoppler-glib8
Code Block
https://github.com/heroku/heroku-buildpack-activestorage-preview
https://buildpack-registry.s3.amazonaws.com/buildpacks/heroku-community/apt.tgz
https://github.com/brandoncc/heroku-buildpack-vips
heroku/ruby

vips-8.10.6-Tue Mar 23 20:52:58 UTC 2021

PDFs work

All TIFFS work

Combined audio derivatives work again (see issue 1448)

libpoppler-glib8 in the aptfile may not be needed (see issue 1455 )

  • Note: Row 2 was a band-aid; it violated the rule implicit in the code that all TIFF derivatives should have their derivatives encoded as srgb, including the derivatives of B&W originals. I interpret the documentation as meaning that the icc profile of originals is reused in their derivatives, but further research is needed.

  • identify -verbose graphics_file.tiff | grep Colorspace can be used to elucidate what happens to various types of original after being processed by vipsthumbnail.