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

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

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