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

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

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