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

s3.ASX	Advanced Stream Redirector
s3.DTS	Digital Theater Systems Audio File
s3.GXF	General eXchange Format
s3.M2V	MPEG-2 Video
s3.M3U	MP3 Uniform Resource Locator
s3.M4V	MPEG-4 Video File
s3.MPEG1	MPEG-1 Video
s3.MPEG2	MPEG-2 Video
s3.MTS	AVCHD Video File
s3.MXF	Material eXchange Format
s3.OGM	Ogg Multimedia Container File
s3.PLS	Playlist
s3.BUP	DVD Information File
s3.A52	Dolby Digital AC-3 Compressed Audio File
s3.AAC	Advanced Audio Coding Compressed Audio File
s3.B4S	Winamp 3+ Playlist
s3.CUE	Cue Sheet
s3.DIVX	DivX Movie
s3.DV	Digital Video
s3.FLV	Flash Video
s3.M1V	MPEG-1 Video
s3.M2TS	MPEG-2 Transport Stream Videos
s3.MKV	Matroska Video Stream
s3.MOV	Apple QuickTime Movie
s3.MPEG4	MPEG-4 Video
s3.OMA	OpenMG Audio File
s3.SPX	Ogg Speex Audio File
s3.TS	DVD Video
s3.VLC	VLC Media Player Data
s3.VOB	DVD Video Object
s3.XSPF	XML Shareable Playlist Format
s3.DAT	VCD Video
s3.BIN	Binary DVD Video
s3.IFO	DVD Information File
s3.PART	Partially Downloaded File
s3.3G2	3G Mobile Phone Video
s3.AVI	Audio Video Interleave
s3.MPEG	MPEG Video
s3.MPG	MPEG Video
s3.FLAC	Free Lossless Audio Codec Compressed Audio FIle
s3.M4A	MPEG-4 Audio File
s3.MP1	MPEG-1 Audio Layer I
s3.OGG	Ogg Multimedia Container File
s3.WAV	Waveform Audio
s3.XM	Extended Module Audio File
s3.3GP	3G Mobile Phone Video
s3.SRT	DVD Subtitles File
s3.WMV	Windows Media Video
s3.AC3	Dolby Digital AC-3 Compressed Audio File
s3.ASF	Advanced Systems Format Video
s3.MOD	MOD Audio File
s3.MP2	MPEG-1 Audio Layer II
s3.MP3	MPEG-1 Audio Layer 3
s3.MP4	MPEG-4 Part 14 Multimedia Container
s3.WMA	Windows Media Audio File
s3.MKA	Matroska Audio Stream
s3.M4P	Protected AAC File

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