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DVD-Video is a consumer video format used to store digital video on DVDs. DVD-Video was the dominant consumer home video format in Asia, North America, [5] Europe, and Australia in the 2000s until it was supplanted by the high-definition Blu-ray Disc; both receive competition as delivery methods by streaming services such as Netflix and Disney+.
The only setup where ATSC could eliminate MPEG-2 encoding/transcoding in a DVD recorder would be where an antenna is hooked directly into a DVD recorder that has an integrated ATSC tuner. However, the DVD recorder will have to transcode the ATSC MPEG-2 into DVD-Video-compliant MPEG-2 if the ATSC MPEG-2 stream isn't already DVD-Video-compatible.
Video codecs are used in DVD players, Internet video, video on demand, digital cable, digital terrestrial television, videotelephony and a variety of other applications. In particular, they are widely used in applications that record or transmit video, which may not be feasible with the high data volumes and bandwidths of uncompressed video.
DV (from Digital Video) is a family of codecs and tape formats used for storing digital video, launched in 1995 by a consortium of video camera manufacturers led by Sony and Panasonic. It includes the recording or cassette formats DV, MiniDV, HDV , DVCAM, DVCPro, DVCPro50, DVCProHD, Digital8 , and Digital-S .
Most DVD-authoring applications focus exclusively on video DVDs and do not support the authoring of DVD-Audio discs. Stand-alone DVD recorder units generally have basic authoring functions, though the creator of the DVD has little or no control over the layout of the DVD menus, which generally differ between models and brands.
For example: For the DVD video format, a recording is stored in an MPEG program stream, containing DVD-Video specific packets for navigation purposes—such as fast forward and fast reverse. In order to fill these packets properly, an encoding system needs to examine considerable amounts of video data, both before and after the navigation point.
For real-time and non-buffered video streaming when the available bandwidth is fixed – e.g., in videoconferencing delivered on channels of fixed bandwidth – a constant bitrate (CBR) must be used. CBR is commonly used for videoconferences, satellite and cable broadcasting. VBR is commonly used for video CD/DVD creation and video in programs.
An AVCREC recorder can use either MPEG4/AVC or MPEG-2 video encoding to record the video. In the so-called DR mode a recorder does not re-compress the incoming signal, fully preserving the original quality of a broadcast program. Some devices offer "long play" modes with compression up to 5x higher than original signal, with corresponding loss ...
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