The rules said nothing about widescreen videos,so the pixel rule was under discussion. mm201 basically said in p/1288454 to basically change the rule to max 480000 pixels to meet the changing standards. For comparison, 800 x 600 = 480,000 pixels, while 848 x 480 = 407,040 pixels. As a result, my 848x480 is already better than the 800 x 600 posted in the rules and should be perfectly fine.
Colin Hou wrote:848x480(480p) exceeded 800x600 (as the rule says), should goes to 800x450 or something like that.