RetroFF

Transcode multiple files or whole folders, with paralel instances of ffmpeg. Default transcode presets include:
H264 20M mp4
H264 5M mp4
XDCAM 50 mxf
DNxHD 120 1080i mxf

All presets can be edited in settings, as ffmpeg options.
The v3.0 Installer will create context menu items and add the RetroFF folder to the PATH variable. Assumes that you have ffmpeg in System32 (executable from cmd as simple ffmpeg).