TX264 is a GUI for x264, ffmpeg, mkvmerge, mkvextract, mp4box, faac, neroaacenc, qaac, oggenc2, aften and flac. It is written in Delphi.
Some features:
-All basic x264 options (profiles, crf, bitrate etc)
-64bit support
-10bit encoding depth support
-Advanced x264 options
-Resizing and cropping
-Split according to size or time
-Preview filters and encoding options applied
-Encode audio streams to aac, ogg, mp3, ac3 or flac
-Apply audio filters (resample, normalize, volume, channel downmix, DRC)
-Copy chapter info from mkv/mp4 source
-Mux encoded content to mp4 or mkv
-Mux all external or internal subtitles to the output mp4/mkv
-Pass custom options to tools
-Detailed info about selected file
Screenshots:
Bug reports and suggestions are more than welcome.
Download page:
http://tx264.sourceforge.net/ just extract 7zip archive and run.