StaxRip supports DivX Plus HD (MKV/H.264/AAC)
It looks like the popular open source transcoding tool, StaxRip, has adopted DivX Plus HD compatible presets and encoding the H.264 video via x264 - the final output is an MKV with H.264 video and AAC audio. This is great news for those of you out there that like the convenience of an application GUI, but also like to tune and tweak as you go.
More info is available here:
Thanks Stax, and we're here to answer questions and provide documentation if you're a developer and would like to target DivX Plus HD devices with your software application.