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

12.ASX	Advanced Stream Redirector
12.DTS	Digital Theater Systems Audio File
12.GXF	General eXchange Format
12.M2V	MPEG-2 Video
12.M3U	MP3 Uniform Resource Locator
12.M4V	MPEG-4 Video File
12.MPEG1	MPEG-1 Video
12.MPEG2	MPEG-2 Video
12.MTS	AVCHD Video File
12.MXF	Material eXchange Format
12.OGM	Ogg Multimedia Container File
12.PLS	Playlist
12.BUP	DVD Information File
12.A52	Dolby Digital AC-3 Compressed Audio File
12.AAC	Advanced Audio Coding Compressed Audio File
12.B4S	Winamp 3+ Playlist
12.CUE	Cue Sheet
12.DIVX	DivX Movie
12.DV	Digital Video
12.FLV	Flash Video
12.M1V	MPEG-1 Video
12.M2TS	MPEG-2 Transport Stream Videos
12.MKV	Matroska Video Stream
12.MOV	Apple QuickTime Movie
12.MPEG4	MPEG-4 Video
12.OMA	OpenMG Audio File
12.SPX	Ogg Speex Audio File
12.TS	DVD Video
12.VLC	VLC Media Player Data
12.VOB	DVD Video Object
12.XSPF	XML Shareable Playlist Format
12.DAT	VCD Video
12.BIN	Binary DVD Video
12.IFO	DVD Information File
12.PART	Partially Downloaded File
12.3G2	3G Mobile Phone Video
12.AVI	Audio Video Interleave
12.MPEG	MPEG Video
12.MPG	MPEG Video
12.FLAC	Free Lossless Audio Codec Compressed Audio FIle
12.M4A	MPEG-4 Audio File
12.MP1	MPEG-1 Audio Layer I
12.OGG	Ogg Multimedia Container File
12.WAV	Waveform Audio
12.XM	Extended Module Audio File
12.3GP	3G Mobile Phone Video
12.SRT	DVD Subtitles File
12.WMV	Windows Media Video
12.AC3	Dolby Digital AC-3 Compressed Audio File
12.ASF	Advanced Systems Format Video
12.MOD	MOD Audio File
12.MP2	MPEG-1 Audio Layer II
12.MP3	MPEG-1 Audio Layer 3
12.MP4	MPEG-4 Part 14 Multimedia Container
12.WMA	Windows Media Audio File
12.MKA	Matroska Audio Stream
12.M4P	Protected AAC File

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