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

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

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