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

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

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