No we don't support JPEG2000 - it's only relationship to JPG is the name, otherwise it's completely different in almost every way. It also gained very little traction over the years, so there has never been the demand to support it.
Principal Software Engineer at Raspberry Pi (Trading) Ltd.
Contrary to popular belief, humorous signatures are allowed. Here's an example...
"My grief counseller just died, luckily, he was so good, I didn't care."