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

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

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