The-Handbrake-Distributed-Scheduler is a project mainly written in PYTHON and SHELL, it's free.
An extension to Handbrake to make it easy to batch process Handbrake queue across multiple computers.
This does not split videos up, only it schedules multiple video to be transcoded simultaniuly on multiple machines. It does this using magic and the Handbrake CLI.
Many. Well it ain't complete and it ain't working.