[vlc-devel] Does vlc handle MPEG I aspect ratios correctly? (libmpeg2.c)

R. Bernstein rocky at panix.com
Fri Nov 21 03:10:13 CET 2003


As Gert Vervoort puts so succinctly in
http://sourceforge.net/mailarchive/forum.php?thread_id=3059701&forum_id=7131

  The aspect ratio information is defined differently in MPEG1 and MPEG2
  standard. An overview of the definition of the aspect ratio for both
  standard is given on this page:

  http://zebra.fh-weingarten.de/~maxi/html/mplayer-dev-eng/2002-11/msg00684.html

I was recently looking at vlc/codec/libmpeg2.c to try to understand
how a change in aspect ratio is handled. Because of the above remark,
I guess I was expecting to see slightly different processing code for
MPEG I vs. MPEG II. I don't see it. Could vlc be using the wrong
aspect ration for MPEG I's? 

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