OGM Files

What are OGM files?
OGG Media file (OGM file), meaning OGG Media File, is a container format (for video, audio and subtitle streams). OGM file was developed by Tobias Waldvogel and can do a few things the common AVI format cannot. OGM files' features include in particular: Vorbis audio support (there is no standard way for AVI to support Vorbis, making any attempt unreliable and potentially incompatible with players)
OGM files support for Windows (including Microsoft's Windows Media Player) is available via Waldvogel's own OGGDS, Haali Media Splitter, ALLPlayer, MPlayer, VLC, or RadLight's OGG Media filters (the last of which can also decode Theora video). On Unix-based systems OGM files support is available in MPlayer, xine, VLC, and any player utilizing the GStreamer framework (such as Totem or Kaffeine).