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

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

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