Yamb is the acronym of Yet Another Mp4Box UI. In other words, this is a new graphical interface for mp4box using a tool based on command lines which is a part of GPAC Framework. This GUI is mainly dedicated to Windows OS.
Yamb is able to create, split and join mp4 or 3gp files containing principally video streams with m4v, cmp, h264, 264, h263, 263 as input format or from avi, mpg, mpeg, vob, mp4, mov, ogg, qcp and 3gp files.
It can also deal with audio streams with aac, amr, awb, evc, mp3, msv, vorbis as input format or from avi, mpg, mpeg, vob (mp2 only), mp4 and 3gp files.
Yamb can even accept subtitles with srt (SubRip), ttxt (GPAC), sub (MicroDVD), idx/sub (VobSub) and xml (QuickTime TeXML) as input formats.
Yamb can also extract some Video or Audio streams from avi files.