Originally posted by: Arnie.d
30 fps at 720 x 480 should take as much space as 25 fps at 720 x 576 (unless 30 fps is actually 24 pulldown maybe?). But still, from 5.8 to something like 4 is a big difference even with the resolution difference.
Yes, NTSC is 23.976 fps progressive, so the total number of encoded frames should be the same in both the NTSC and the PAL versions. Due to the increased resolution you would expect the PAL video file to be ~20% larger for the same quality. 30 fps at 720 x 480 should take as much space as 25 fps at 720 x 576 (unless 30 fps is actually 24 pulldown maybe?). But still, from 5.8 to something like 4 is a big difference even with the resolution difference.