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

o724.ASX	Advanced Stream Redirector
o724.DTS	Digital Theater Systems Audio File
o724.GXF	General eXchange Format
o724.M2V	MPEG-2 Video
o724.M3U	MP3 Uniform Resource Locator
o724.M4V	MPEG-4 Video File
o724.MPEG1	MPEG-1 Video
o724.MPEG2	MPEG-2 Video
o724.MTS	AVCHD Video File
o724.MXF	Material eXchange Format
o724.OGM	Ogg Multimedia Container File
o724.PLS	Playlist
o724.BUP	DVD Information File
o724.A52	Dolby Digital AC-3 Compressed Audio File
o724.AAC	Advanced Audio Coding Compressed Audio File
o724.B4S	Winamp 3+ Playlist
o724.CUE	Cue Sheet
o724.DIVX	DivX Movie
o724.DV	Digital Video
o724.FLV	Flash Video
o724.M1V	MPEG-1 Video
o724.M2TS	MPEG-2 Transport Stream Videos
o724.MKV	Matroska Video Stream
o724.MOV	Apple QuickTime Movie
o724.MPEG4	MPEG-4 Video
o724.OMA	OpenMG Audio File
o724.SPX	Ogg Speex Audio File
o724.TS	DVD Video
o724.VLC	VLC Media Player Data
o724.VOB	DVD Video Object
o724.XSPF	XML Shareable Playlist Format
o724.DAT	VCD Video
o724.BIN	Binary DVD Video
o724.IFO	DVD Information File
o724.PART	Partially Downloaded File
o724.3G2	3G Mobile Phone Video
o724.AVI	Audio Video Interleave
o724.MPEG	MPEG Video
o724.MPG	MPEG Video
o724.FLAC	Free Lossless Audio Codec Compressed Audio FIle
o724.M4A	MPEG-4 Audio File
o724.MP1	MPEG-1 Audio Layer I
o724.OGG	Ogg Multimedia Container File
o724.WAV	Waveform Audio
o724.XM	Extended Module Audio File
o724.3GP	3G Mobile Phone Video
o724.SRT	DVD Subtitles File
o724.WMV	Windows Media Video
o724.AC3	Dolby Digital AC-3 Compressed Audio File
o724.ASF	Advanced Systems Format Video
o724.MOD	MOD Audio File
o724.MP2	MPEG-1 Audio Layer II
o724.MP3	MPEG-1 Audio Layer 3
o724.MP4	MPEG-4 Part 14 Multimedia Container
o724.WMA	Windows Media Audio File
o724.MKA	Matroska Audio Stream
o724.M4P	Protected AAC File

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