Then it's not recompression. Recompression is pulling (let's say) a JPG into memory so it becomes a bitmap and writing it back out to a JPG. If you want to keep

Then it's not recompression. Recompression is pulling (let's say) a JPG into memory so it becomes a bitmap and writing it back out to a JPG. If you want to keep metadata you only keep a specific set and you cap the value lengths.