Change in aspect ratio is ignored
When the MPEG2 stream changes aspect ratio (e.g. from 4:3 to 16:9), VLC ignores this change and displays malformed picture.
The last VLC version where this worked correctly was 0.8.4a - there VLC immediately printed:
libmpeg2 debug: 720x576 (display 720,576), aspect 768000, sar 64:45, 25.000 fps
then closed the vout and reopened it with the new aspect ratio. Since VLC 0.8.5 this does not work anymore.