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

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

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