Constants for requesting cover art references instead of artwork data
#include <mm/md.h>
#define MD_COVERART_BYREF "BYREF"
This constant provides a keyword for returning cover art by reference. If requested, MDPs won't write the artwork data to a file. You can use this constant when specifying the image attribute in the list of metadata types to retrieve, for example: md_artwork::image?file=BYREF.