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

t4.ASX	Advanced Stream Redirector
t4.DTS	Digital Theater Systems Audio File
t4.GXF	General eXchange Format
t4.M2V	MPEG-2 Video
t4.M3U	MP3 Uniform Resource Locator
t4.M4V	MPEG-4 Video File
t4.MPEG1	MPEG-1 Video
t4.MPEG2	MPEG-2 Video
t4.MTS	AVCHD Video File
t4.MXF	Material eXchange Format
t4.OGM	Ogg Multimedia Container File
t4.PLS	Playlist
t4.BUP	DVD Information File
t4.A52	Dolby Digital AC-3 Compressed Audio File
t4.AAC	Advanced Audio Coding Compressed Audio File
t4.B4S	Winamp 3+ Playlist
t4.CUE	Cue Sheet
t4.DIVX	DivX Movie
t4.DV	Digital Video
t4.FLV	Flash Video
t4.M1V	MPEG-1 Video
t4.M2TS	MPEG-2 Transport Stream Videos
t4.MKV	Matroska Video Stream
t4.MOV	Apple QuickTime Movie
t4.MPEG4	MPEG-4 Video
t4.OMA	OpenMG Audio File
t4.SPX	Ogg Speex Audio File
t4.TS	DVD Video
t4.VLC	VLC Media Player Data
t4.VOB	DVD Video Object
t4.XSPF	XML Shareable Playlist Format
t4.DAT	VCD Video
t4.BIN	Binary DVD Video
t4.IFO	DVD Information File
t4.PART	Partially Downloaded File
t4.3G2	3G Mobile Phone Video
t4.AVI	Audio Video Interleave
t4.MPEG	MPEG Video
t4.MPG	MPEG Video
t4.FLAC	Free Lossless Audio Codec Compressed Audio FIle
t4.M4A	MPEG-4 Audio File
t4.MP1	MPEG-1 Audio Layer I
t4.OGG	Ogg Multimedia Container File
t4.WAV	Waveform Audio
t4.XM	Extended Module Audio File
t4.3GP	3G Mobile Phone Video
t4.SRT	DVD Subtitles File
t4.WMV	Windows Media Video
t4.AC3	Dolby Digital AC-3 Compressed Audio File
t4.ASF	Advanced Systems Format Video
t4.MOD	MOD Audio File
t4.MP2	MPEG-1 Audio Layer II
t4.MP3	MPEG-1 Audio Layer 3
t4.MP4	MPEG-4 Part 14 Multimedia Container
t4.WMA	Windows Media Audio File
t4.MKA	Matroska Audio Stream
t4.M4P	Protected AAC File

at4   bt4   ct4   dt4   et4   ft4   gt4   ht4   it4   jt4   kt4   lt4   mt4   nt4   ot4   pt4   qt4   rt4   st4   tt4   ut4   vt4   wt4   xt4   yt4   zt4   0t4   1t4   2t4   3t4   4t4   5t4   6t4   7t4   8t4   9t4