Please note that there are currently efforts on the way of specifying a version 2 of MHL (as “ASC MHL”) at the Advanced Data Management Subcommittee of the ASC Motion Imaging Technology Council at the American Society of Cinematographers (ASC).
Resources on theasc.com:
You can follow the progress of implementation of the new reference implementation for ASC MHL here: https://github.com/ascmitc/mhl.
The information on this webpage is about the “original” MHL specification and will soon be updated.
MHL Tool: cross-platform command tool
This is the open source reference implementation of the MHL standard.
The source code is available at the github repository:
Precompiled binaries for Linux, OS X and Windows can be downloaded here: