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

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

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