Baka Encoder is a self-contained x264, x265 and NeroAAC frontend dedicated for producing final encodings of video materials. Handles AviSynth scripts, video/audio without compression and video compressed with common intermediate codecs. Presets are defined via xml config with direct control over x264, x265 and NeroAAC command line parameters.

More info and downloads:

changes in v1.3.4:
  • added support for overriding build-in CLI tools (x264-8.exe, x264-10.exe, x265-8.exe, x265-10.exe) with those located in Baka Encoder folder
  • x265 build updated to revision 10223 (1.6+238)