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Re: [VCDImager] Newbie svcd quiestion

From: Matto Marjanovic
Subject: Re: [VCDImager] Newbie svcd quiestion
Date: Thu, 13 Dec 2001 16:42:36 -0500
User-agent: SEMI/1.14.3 (Ushinoya) FLIM/1.14.3 (Unebigory ōmae) APEL/10.3 Emacs/20.7 (i386-debian-linux-gnu) MULE/4.0 (HANANOEN)

 >pixel aspect ratios are only relevant to MPEG 1
 >MPEG 2 uses display aspect ratios except the square pixel (==VGA) mode

So the standard says, but is that how it is used in practice?

Was my original statement true?  
 >> I was under the impression that it was "2/3 D1" --- i.e. scaled from 720
 >>  to 480 in width (and height stays 480/576 as appropriate for NTSC/PAL).

One place I got this from is "The Super Video CD FAQ".

If this is true, then SVCD's don't strictly adhere to the MPEG-2 spec,
 because a 720x480 frame with CCIR-601 pixels is not exactly 4:3.

-matt m.

ps:  If Andrew Stevens is reading, sorry to go through all this again.
     No one has yet come forth to say that the SVCD FAQ is wrong....

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