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

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

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