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

28.ASX	Advanced Stream Redirector
28.DTS	Digital Theater Systems Audio File
28.GXF	General eXchange Format
28.M2V	MPEG-2 Video
28.M3U	MP3 Uniform Resource Locator
28.M4V	MPEG-4 Video File
28.MPEG1	MPEG-1 Video
28.MPEG2	MPEG-2 Video
28.MTS	AVCHD Video File
28.MXF	Material eXchange Format
28.OGM	Ogg Multimedia Container File
28.PLS	Playlist
28.BUP	DVD Information File
28.A52	Dolby Digital AC-3 Compressed Audio File
28.AAC	Advanced Audio Coding Compressed Audio File
28.B4S	Winamp 3+ Playlist
28.CUE	Cue Sheet
28.DIVX	DivX Movie
28.DV	Digital Video
28.FLV	Flash Video
28.M1V	MPEG-1 Video
28.M2TS	MPEG-2 Transport Stream Videos
28.MKV	Matroska Video Stream
28.MOV	Apple QuickTime Movie
28.MPEG4	MPEG-4 Video
28.OMA	OpenMG Audio File
28.SPX	Ogg Speex Audio File
28.TS	DVD Video
28.VLC	VLC Media Player Data
28.VOB	DVD Video Object
28.XSPF	XML Shareable Playlist Format
28.DAT	VCD Video
28.BIN	Binary DVD Video
28.IFO	DVD Information File
28.PART	Partially Downloaded File
28.3G2	3G Mobile Phone Video
28.AVI	Audio Video Interleave
28.MPEG	MPEG Video
28.MPG	MPEG Video
28.FLAC	Free Lossless Audio Codec Compressed Audio FIle
28.M4A	MPEG-4 Audio File
28.MP1	MPEG-1 Audio Layer I
28.OGG	Ogg Multimedia Container File
28.WAV	Waveform Audio
28.XM	Extended Module Audio File
28.3GP	3G Mobile Phone Video
28.SRT	DVD Subtitles File
28.WMV	Windows Media Video
28.AC3	Dolby Digital AC-3 Compressed Audio File
28.ASF	Advanced Systems Format Video
28.MOD	MOD Audio File
28.MP2	MPEG-1 Audio Layer II
28.MP3	MPEG-1 Audio Layer 3
28.MP4	MPEG-4 Part 14 Multimedia Container
28.WMA	Windows Media Audio File
28.MKA	Matroska Audio Stream
28.M4P	Protected AAC File

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