[vdr] HDTV -> mpeg4
udo_richter at gmx.de
Mon Mar 28 19:55:48 CEST 2005
Grégoire Favre wrote:
> just done a small try to convert an Euro1080 FTA preview to mpeg4, with
> a bitrate of 2500 with mencoder : quality was very bad...
For PAL video (720x576, 25fps progressive / 50fps interlaced), quality
gets awful below 900kbit/s, good quality requires at least 1500kbit/s.
(using a good encoder and 2-pass of course.)
For HDTV (1920x1080, 50i I assume) you get 5 times the pixels, so you
should use 5 times the bitrate too, giving 4500-7500kbit/s. Thats 135min
(4500) resp. 82min (7500) of mpeg4 video on a single layer 4.7G disc.
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