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

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

a4i   b4i   c4i   d4i   e4i   f4i   g4i   h4i   i4i   j4i   k4i   l4i   m4i   n4i   o4i   p4i   q4i   r4i   s4i   t4i   u4i   v4i   w4i   x4i   y4i   z4i   04i   14i   24i   34i   44i   54i   64i   74i   84i   94i