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

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

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