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Digital video recorder
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== File formats, resolutions and file systems == DVRs can usually record and play [[H.264/MPEG-4 AVC|H.264]], [[MPEG-4 Part 2]], [[MPEG-2]] [[.mpg]], [[MPEG-2]] .[[MPEG transport stream|TS]], [[VOB]] and [[ISO image]]s video, with [[MP3]] and [[Dolby AC-3|AC3]] audio tracks. They can also display images ([[JPEG]] and [[Portable Network Graphics|PNG]]) and play music files ([[MP3]] and [[Ogg]]). Some devices can be [[firmware|updated]] to play and record in new formats. DVRs usually record in proprietary [[file system]]s for [[copy protection]], although some can use [[File Allocation Table|FAT]] file systems. Recordings from [[standard-definition television]] usually have 480p/i/576p/i while [[HDTV]] is usually in 720p/1080i.
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