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

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

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