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

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

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