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

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

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