Camera Raw Previews app for Nextcloud
A Nextcloud app that extracts embedded previews for camera RAW images like .CR2, .CRW, .DNG, .MRW, .NEF, .NRW, .RW2, .SRW, .SRW, etc.
This app also gives you preview of Adobe Indesign files (.INDD) photos.
Install in Nextcloud App store. https://apps.nextcloud.com/apps/camerarawpreviews
Install in ownCloud Marketplace (older version that is not supported anymore, due to too much difference between owncloud and nextcloud now) https://marketplace.owncloud.com/apps/camerarawpreviews
$ exiftool -json -preview:all rawfile.dng
[{
"SourceFile": "rawfile.dng"
}]