: A unique frame or image number, often generated by the camera's internal counter or during post-processing. .jpg : The standard file format for digital images.
: Typically a sequence or scene number within that specific set. BTM18 Alexia Set 062 4015.jpg
: Often refers to a specific project code, collection, or series (e.g., "BTM" might stand for a brand or shoot series). : A unique frame or image number, often