Don't know if this is already out there, but here is a link to a free app that will create a text file of Chapter markers based on the markers placed in FCPX, Needs fcpxml of your project.

Saves me a ton of time since about 75% of my work is DVDs with chapters.

Kudos to whoever wrote this.

https://github.com/rockwood/fcpx-Marker-Converter

Yeah..this looks great. But their website indicates it's a bit finicky and occasionally markers can be slightly offset from what you've actually set. Have you noticed this at all?

It was pretty accurate. I had almost a dozen markers over a 2 hour video and all were right on except 1 was way off. I have another project this weekend where I can test it again.