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

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

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