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

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

ani   bni   cni   dni   eni   fni   gni   hni   ini   jni   kni   lni   mni   nni   oni   pni   qni   rni   sni   tni   uni   vni   wni   xni   yni   zni   0ni   1ni   2ni   3ni   4ni   5ni   6ni   7ni   8ni   9ni