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

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

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