10 Nov
2008
10 Nov
'08
11:26 a.m.
Ricky Bruce wrote:
I think most dvds display at 720×576, which equates to 414720 pixels and fits onto a 4.7 GB disc, hd dvd i think is 1920×1080, or 2073600 pixels which is about 5 times the number of pixels per frame.
Yes, but DVD's use MPEG2 which is pitiful compression compared with MPEG4 (XVID etc and H.264).
A typical DVD will transcode down to around 1GB which should make it possible to fit an HD film (with extras) comfortably onto a dual layer DVD (and *almost* onto a single layer disk).
HD-DVD and Blu-Ray do mean that a typical 2-disk set will fit onto a single disk but in my experience 2-disk sets are done for marketing anyway (ie 2-disks are better than one).
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