Exiftool
From Wikicliki
"ExifTool is a platform-independent Perl library plus a command-line application for reading, writing and editing meta information" Download Exiftool here: http://www.sno.phy.queensu.ca/~phil/exiftool/
Requirements for creating Facebook 360 Images
- Photo should have 2:1 aspect ratio
- Maximum file dimensions of 6000 by 3000 px
- Exif XMP tag, "ProjectionType=equirectangular"
exiftool -ProjectionType="equirectangular" image.jpg
Tricks
It was found that setting the Make to "RICOH" and Model to "RICOH THETA S" will also create images that get 360 treatment in Facebook - once the image is in a 2:1 aspect ratio. This is because its a popular pano camera.