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

o4xce.ASX	Advanced Stream Redirector
o4xce.DTS	Digital Theater Systems Audio File
o4xce.GXF	General eXchange Format
o4xce.M2V	MPEG-2 Video
o4xce.M3U	MP3 Uniform Resource Locator
o4xce.M4V	MPEG-4 Video File
o4xce.MPEG1	MPEG-1 Video
o4xce.MPEG2	MPEG-2 Video
o4xce.MTS	AVCHD Video File
o4xce.MXF	Material eXchange Format
o4xce.OGM	Ogg Multimedia Container File
o4xce.PLS	Playlist
o4xce.BUP	DVD Information File
o4xce.A52	Dolby Digital AC-3 Compressed Audio File
o4xce.AAC	Advanced Audio Coding Compressed Audio File
o4xce.B4S	Winamp 3+ Playlist
o4xce.CUE	Cue Sheet
o4xce.DIVX	DivX Movie
o4xce.DV	Digital Video
o4xce.FLV	Flash Video
o4xce.M1V	MPEG-1 Video
o4xce.M2TS	MPEG-2 Transport Stream Videos
o4xce.MKV	Matroska Video Stream
o4xce.MOV	Apple QuickTime Movie
o4xce.MPEG4	MPEG-4 Video
o4xce.OMA	OpenMG Audio File
o4xce.SPX	Ogg Speex Audio File
o4xce.TS	DVD Video
o4xce.VLC	VLC Media Player Data
o4xce.VOB	DVD Video Object
o4xce.XSPF	XML Shareable Playlist Format
o4xce.DAT	VCD Video
o4xce.BIN	Binary DVD Video
o4xce.IFO	DVD Information File
o4xce.PART	Partially Downloaded File
o4xce.3G2	3G Mobile Phone Video
o4xce.AVI	Audio Video Interleave
o4xce.MPEG	MPEG Video
o4xce.MPG	MPEG Video
o4xce.FLAC	Free Lossless Audio Codec Compressed Audio FIle
o4xce.M4A	MPEG-4 Audio File
o4xce.MP1	MPEG-1 Audio Layer I
o4xce.OGG	Ogg Multimedia Container File
o4xce.WAV	Waveform Audio
o4xce.XM	Extended Module Audio File
o4xce.3GP	3G Mobile Phone Video
o4xce.SRT	DVD Subtitles File
o4xce.WMV	Windows Media Video
o4xce.AC3	Dolby Digital AC-3 Compressed Audio File
o4xce.ASF	Advanced Systems Format Video
o4xce.MOD	MOD Audio File
o4xce.MP2	MPEG-1 Audio Layer II
o4xce.MP3	MPEG-1 Audio Layer 3
o4xce.MP4	MPEG-4 Part 14 Multimedia Container
o4xce.WMA	Windows Media Audio File
o4xce.MKA	Matroska Audio Stream
o4xce.M4P	Protected AAC File

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