MKVToolnix is a set of tools to create, alter and inspect Matroska files under Linux, other Unices and Windows. They do for Matroska what the OGMtools do for the OGM format and then some. The latest builds now have the ability to create WebM compliant Files.
MKVtools was primarily designed for processing mkv files for use in DivX enabled DVD players, it's capabilites have been expanded to allow for the input of most standard video file formats. As the name sort of implies, MKVtools is a graphical interface for a variety of tools...
mkv/avi to mp4 converts mkv and avi files in h264 video to mp4 files without reencode the video stream. Subtitle will be embed as soft subtitle. Convert speed is fast as video is not reconverted. Works on iPad, etc. mp4box, mkvextract, beSweet, eac3to, mediainfo are used.
Last version, 1.0.8, was released on September 19, 2010, but it is still downloadable from VideoHelp.com and SourceForge.
A simple remux/recode app based on FFmpeg.
Change container without reencoding Select, rearrange and duplicate tracks Convert DTS to AC3 for e.g. AppleTV or PS3.
The official website is no longer available. Last version, 1.3.1, released in August 2014, can be still downloaded from MacUpdate