Adobe flash spritesheet to unity

Is there a simple possibility to import a sprite sheet into unity that was generated with Adobe Flash Professional? The slicing is rather complicated if all the sprite sheets (around 400) have different measurements. And in Flash it is possible to export the slicing coordinates various formats like JSON, starling, cocos3D and more but unity does not offer a default import function for all of those…

Anyone got a solution?

Or you simply can use this tool
Flash Sprite Sheet Importer
It is available on the asset-store for FREE!

export as .png in adobe flash… or uncheck trim in the “Generate Sprite sheet” menu. the latter works in adobe animate cc 2017