What video format is used in DVD?
The main video format for DVD is ISO MPEG-2. It offers many advantages over the older VideoCD format, which used MPEG-1 video. For one, the video frame size for MPEG-1, is about one quarter the size of MPEG-2, which will yield poorer visual quality than that of full screen MPEG-2. Additionally, MPEG-2 offers 30frames per second (really 29.97fps) which is interleaved to provide two fields of video for every frame unlike MPEG-1. This key feature provides a clearer picture over that of MPEG-1. The case of ‘the jaggies’, are very much reduced due to the interlacing of fields. Another advantage is that MPEG-2 offers the ability to vary the bit rate as a function of frame to frame content. This is called VBR encoding or Variable Bit Rate verses Constant Bit Rate that MPEG-1 is constrained under. The DVD standard allows for both VBR and CBR encoding of video material. On average, having VBR capability creates a file size that can be much smaller than that of a CBR produced file. Only video co
