meGUI is a graphical front-end to a variety of modern video and audio encoders capable of producing video that adheres to the MPEG-4 standard, both MPEG-4 Part 2 (ASP) and MPEG-4 Part 10 (AVC). Its aim is to ease the usage of other Open Source encoder projects, although it has support for a proprietary AAC audio encoder as well.
The following video encoders are supported:
x264
xvid and libavcodec via mencoder
snow
The following audio encoders are supported via BeSweet:
faac
lame mp3
Nero AAC (proprietary - both version 6 and 7 supported)
It has integrated multiplexing support for the production of mp4 (via mp4box), mkv and avi containers (AVC video is only supported in mp4 and mkv), incorporating video, audio, chapters and subtitles. It accepts input video in MPEG-2 format (using DGIndexer) as well as .avi and .vdr (VirtualDub framserver) formats.
Additional features include an integrated Avisynth script creator similar to that found in GordianKnot, a bitrate calculator and a One Click Encoder which chains together the various steps needed to convert a series of .VOB files to a final encoded file. Additional utilities include an AVC quantiser matrix editor and chapter editor.