Minimum Average Maximum
xvid_1pass_vhq4_BF PSNR: 41.3953 46.3430 51.8527
xvid_1pass_BF_NoVHQ PSNR: 41.3286 46.2422 51.8527
xvid_2pass_BF_NoVHQ PSNR: 41.1278 46.1418 51.8527
xvid_1pass_vhq1_BF PSNR: 41.2920 45.9862 51.8527
xvid_2pass_NoBF_NoVHQ PSNR: 41.2253 45.5668 49.6583
xvid_1pass_NoBF_NoVHQ PSNR: 41.5226 45.6318 49.6583
xvid_1pass_NoBF_VHQ4 PSNR: 40.8503 43.8771 47.3326
divx5.05pro_1pass PSNR: 41.1715 45.9719 50.2667
divx5.05pro_2pass PSNR: 41.2601 46.1691 54.9770
wmv9(q90,大小1422k)PSNR: 44.7546 46.8205 51.5024
wmv9(q89,大小900k) PSNR: 42.9600 44.9849 50.1756
注1:三种通用格式比较,侧重于低码率的比较,wmv9较好,xvid做了几种参数对比,在低码率下,bf是非常有效的,xvid出现了1pass比2pass好的情况.
注2:wmv9格式中,Q89与Q90之间出现了临界点,体积的变化是跳跃性的(900k--->1422k).但PSNR下降不太多,WMV9的codec估计有猫腻......divx与rv9的合体?