VLC media player is an open source video and audio player capable of playing almost any type of media including DVDs and VCDs. In addition to being able to play most video and audio files, VLC can also post free ads without registration
File extensions that can be opened by vlc-media-player

efn.ASX	Advanced Stream Redirector
efn.DTS	Digital Theater Systems Audio File
efn.GXF	General eXchange Format
efn.M2V	MPEG-2 Video
efn.M3U	MP3 Uniform Resource Locator
efn.M4V	MPEG-4 Video File
efn.MPEG1	MPEG-1 Video
efn.MPEG2	MPEG-2 Video
efn.MTS	AVCHD Video File
efn.MXF	Material eXchange Format
efn.OGM	Ogg Multimedia Container File
efn.PLS	Playlist
efn.BUP	DVD Information File
efn.A52	Dolby Digital AC-3 Compressed Audio File
efn.AAC	Advanced Audio Coding Compressed Audio File
efn.B4S	Winamp 3+ Playlist
efn.CUE	Cue Sheet
efn.DIVX	DivX Movie
efn.DV	Digital Video
efn.FLV	Flash Video
efn.M1V	MPEG-1 Video
efn.M2TS	MPEG-2 Transport Stream Videos
efn.MKV	Matroska Video Stream
efn.MOV	Apple QuickTime Movie
efn.MPEG4	MPEG-4 Video
efn.OMA	OpenMG Audio File
efn.SPX	Ogg Speex Audio File
efn.TS	DVD Video
efn.VLC	VLC Media Player Data
efn.VOB	DVD Video Object
efn.XSPF	XML Shareable Playlist Format
efn.DAT	VCD Video
efn.BIN	Binary DVD Video
efn.IFO	DVD Information File
efn.PART	Partially Downloaded File
efn.3G2	3G Mobile Phone Video
efn.AVI	Audio Video Interleave
efn.MPEG	MPEG Video
efn.MPG	MPEG Video
efn.FLAC	Free Lossless Audio Codec Compressed Audio FIle
efn.M4A	MPEG-4 Audio File
efn.MP1	MPEG-1 Audio Layer I
efn.OGG	Ogg Multimedia Container File
efn.WAV	Waveform Audio
efn.XM	Extended Module Audio File
efn.3GP	3G Mobile Phone Video
efn.SRT	DVD Subtitles File
efn.WMV	Windows Media Video
efn.AC3	Dolby Digital AC-3 Compressed Audio File
efn.ASF	Advanced Systems Format Video
efn.MOD	MOD Audio File
efn.MP2	MPEG-1 Audio Layer II
efn.MP3	MPEG-1 Audio Layer 3
efn.MP4	MPEG-4 Part 14 Multimedia Container
efn.WMA	Windows Media Audio File
efn.MKA	Matroska Audio Stream
efn.M4P	Protected AAC File

aefn   befn   cefn   defn   eefn   fefn   gefn   hefn   iefn   jefn   kefn   lefn   mefn   nefn   oefn   pefn   qefn   refn   sefn   tefn   uefn   vefn   wefn   xefn   yefn   zefn   0efn   1efn   2efn   3efn   4efn   5efn   6efn   7efn   8efn   9efn