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

pk6.ASX	Advanced Stream Redirector
pk6.DTS	Digital Theater Systems Audio File
pk6.GXF	General eXchange Format
pk6.M2V	MPEG-2 Video
pk6.M3U	MP3 Uniform Resource Locator
pk6.M4V	MPEG-4 Video File
pk6.MPEG1	MPEG-1 Video
pk6.MPEG2	MPEG-2 Video
pk6.MTS	AVCHD Video File
pk6.MXF	Material eXchange Format
pk6.OGM	Ogg Multimedia Container File
pk6.PLS	Playlist
pk6.BUP	DVD Information File
pk6.A52	Dolby Digital AC-3 Compressed Audio File
pk6.AAC	Advanced Audio Coding Compressed Audio File
pk6.B4S	Winamp 3+ Playlist
pk6.CUE	Cue Sheet
pk6.DIVX	DivX Movie
pk6.DV	Digital Video
pk6.FLV	Flash Video
pk6.M1V	MPEG-1 Video
pk6.M2TS	MPEG-2 Transport Stream Videos
pk6.MKV	Matroska Video Stream
pk6.MOV	Apple QuickTime Movie
pk6.MPEG4	MPEG-4 Video
pk6.OMA	OpenMG Audio File
pk6.SPX	Ogg Speex Audio File
pk6.TS	DVD Video
pk6.VLC	VLC Media Player Data
pk6.VOB	DVD Video Object
pk6.XSPF	XML Shareable Playlist Format
pk6.DAT	VCD Video
pk6.BIN	Binary DVD Video
pk6.IFO	DVD Information File
pk6.PART	Partially Downloaded File
pk6.3G2	3G Mobile Phone Video
pk6.AVI	Audio Video Interleave
pk6.MPEG	MPEG Video
pk6.MPG	MPEG Video
pk6.FLAC	Free Lossless Audio Codec Compressed Audio FIle
pk6.M4A	MPEG-4 Audio File
pk6.MP1	MPEG-1 Audio Layer I
pk6.OGG	Ogg Multimedia Container File
pk6.WAV	Waveform Audio
pk6.XM	Extended Module Audio File
pk6.3GP	3G Mobile Phone Video
pk6.SRT	DVD Subtitles File
pk6.WMV	Windows Media Video
pk6.AC3	Dolby Digital AC-3 Compressed Audio File
pk6.ASF	Advanced Systems Format Video
pk6.MOD	MOD Audio File
pk6.MP2	MPEG-1 Audio Layer II
pk6.MP3	MPEG-1 Audio Layer 3
pk6.MP4	MPEG-4 Part 14 Multimedia Container
pk6.WMA	Windows Media Audio File
pk6.MKA	Matroska Audio Stream
pk6.M4P	Protected AAC File

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