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

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

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