2.1.1847 Part 4 Section 19.2.3.19, ST_OLELinkType (Embedded Object Alternate Image Request Types)

  • Article

a.   The standard specifies these supported enumeration values: Bitmap, EnhancedMetaFile, Picture,  Jpeg, Png

Office supports only Bitmap, EnhancedMetaFile and Picture enumeration values, not Jpeg or Png.