I also wanted to check if GNOME Photos can show metadata and if EoG could reuse or share metadata parsing from it, but it crashes when trying to open HEIF photos (seems like there's no GEGL support for HEIF yet).ĭoes it even make sense to put HEIC metadata parsing into EoG (would patches be accepted) or should this e.g. I have found qtdemux_tags.c in gst-plugins-good, but not sure if it would work for HEIF metadata easily and if EoG wants to link against GStreamer just for image metadata. A quick Google search doesn't bring up anything obvious that would be able to parse QTFF metadata with a GLib-style interface. The exiftool implementation of HEIC metadata reading is here:īased on that, it seems like ISO ISO 14496-12:2015 parsing would be needed. is used as abstraction in EoG to read metadata, and it has implementations for JPG and PNG metadata only (with mostly custom implementations, using libexif, lcms and exempi for some of the lower devel details).Įxiftool has support for reading HEIC image data, but a quick Google search brings up this eog-list post from 2005 which suggests that implementing an "eog-metadata-reader-exiftool" that runs exiftool (which does have a -json option for outputting machine-readable metadata as JSON for tool consumption) as subprocess is probably not desirable - is this still true?Īnyway, exiftool -verbose somefile.heic can be used to see how exiftool understands and interprets the container format, it seems to contain both Exif and XMP information. Looking at the sources, it looks like eog-metadata-reader. However, metadata (date/time of photo taken, GPS position, etc.) is not displayed at all.
With #36 (closed) fixed, and (on Ubuntu) the heif-gdk-pixbuf package, viewing HEIF/HEIC files with EoG works fine.
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