This is better than the default software that comes with most of the rockchip players - has more options, and CAN embed subtitles in movies.
MPlayer & MEncoder based.
Download links: The latest version 0.57.3 is here:
http://www.vidrop.vpunk.co.uk/vidrop-0.57.3-install.msi
ftp://guest%40learnfree%2Eeu:guest@l....3-install.msi
Currently there is no helpfile, but the gui is self-explanatory (just look at the hints that show up when you hover the cursor over some option).
Screenshots:
If you encounter bugs, or have comments - send me a PM or post here.