I have 2 short question, too:
Is that right that is not recommed to use idct=6 with a Athlon (thunderbird), because the CPU has no SSE unit, or is it not so important and mpeg2dec3 use only MMX with that idct?
And what is with accurate? i think a idct which is more accurate is better, or is idct=6 accurate "enough"?
P.S. I hope everybody understood me, but english is not easy for me