又找了一段非常好压的动画片试了一下,结论照旧:
Job commandline: "D:\Program Files\megui\tools\x264\x264.exe" --crf 22 --level 3.1 --ref 5 --mixed-refs --no-fast-pskip --bframes 3 --b-pyramid --b-rdo --bime --weightb --direct auto --subme 6 --trellis 1 --analyse p8x8,b8x8,i4x4,i8x8 --8x8dct --vbv-bufsize 14000 --vbv-maxrate 14000 --me umh --merange 32 --threads auto --thread-input --sar 1:1 --progress --no-dct-decimate --output "D:\RipTemp\264deblock\g1.mkv" "D:\RipTemp\264deblock\g.avs"
avis [info]: 848x480 @ 24.04 fps (2001 frames)
x264 [info]: using SAR=1/1
x264 [info]: using cpu capabilities: MMX MMXEXT SSE SSE2 SSE3 3DNow!
x264 [info]: slice I:22Avg QP:21.86 size: 21929 PSNR Mean Y:43.80 U:47.61 V:46.74 Avg:44.56 Global:40.84
x264 [info]: slice P:609 Avg QP:18.68 size: 2798 PSNR Mean Y:45.89 U:48.62 V:47.75 Avg:46.51 Global:46.29
x264 [info]: slice B:1370 Avg QP:21.06 size: 240 PSNR Mean Y:45.84 U:48.64 V:47.78 Avg:46.48 Global:46.28
x264 [info]: mb I I16..4: 35.5% 34.6% 29.9%
x264 [info]: mb P I16..4: 2.3% 2.0% 0.8% P16..4: 27.0% 3.7% 2.0% 0.0% 0.0%skip:62.1%
x264 [info]: mb B I16..4: 0.1% 0.0% 0.0% B16..8: 5.4% 0.1% 0.1% direct: 0.2% skip:94.1%
x264 [info]: 8x8 transform intra:37.2% inter:53.1%
x264 [info]: direct mvs spatial:95.7% temporal:4.3%
x264 [info]: ref P 67.2% 14.6% 10.8% 3.4% 4.1%
x264 [info]: ref B 77.5% 14.3% 6.2% 2.0%
x264 [info]: SSIM Mean Y:0.9942586
x264 [info]: PSNR Mean Y:45.832 U:48.622 V:47.760 Avg:46.465 Global:46.163 kb/s:241.71
encoded 2001 frames, 11.12 fps, 241.88 kb/s
desired video bitrate of this job: 22 kbit/s - obtained video bitrate (approximate): 244 kbit/s
Job commandline: "D:\Program Files\megui\tools\x264\x264.exe" --crf 22 --level 3.1 --ref 5 --mixed-refs --no-fast-pskip --bframes 3 --b-pyramid --b-rdo --bime --weightb --direct auto --subme 6 --trellis 2 --analyse p8x8,b8x8,i4x4,i8x8 --8x8dct --vbv-bufsize 14000 --vbv-maxrate 14000 --me umh --merange 32 --threads auto --thread-input --sar 1:1 --progress --no-dct-decimate --output "D:\RipTemp\264deblock\g2.mkv" "D:\RipTemp\264deblock\g.avs"
avis [info]: 848x480 @ 24.04 fps (2001 frames)
x264 [info]: using SAR=1/1
x264 [info]: using cpu capabilities: MMX MMXEXT SSE SSE2 SSE3 3DNow!
x264 [info]: slice I:22Avg QP:22.10 size: 21483 PSNR Mean Y:43.68 U:47.58 V:46.72 Avg:44.44 Global:40.00
x264 [info]: slice P:609 Avg QP:18.78 size: 2744 PSNR Mean Y:45.78 U:48.58 V:47.72 Avg:46.42 Global:46.18
x264 [info]: slice B:1370 Avg QP:21.23 size: 212 PSNR Mean Y:45.72 U:48.60 V:47.75 Avg:46.37 Global:46.16
x264 [info]: mb I I16..4: 32.0% 38.1% 29.9%
x264 [info]: mb P I16..4: 2.1% 2.3% 0.8% P16..4: 27.1% 3.9% 2.2% 0.0% 0.0%skip:61.7%
x264 [info]: mb B I16..4: 0.1% 0.0% 0.0% B16..8: 5.3% 0.1% 0.1% direct: 0.2% skip:94.2%
x264 [info]: 8x8 transform intra:41.6% inter:59.0%
x264 [info]: direct mvs spatial:95.8% temporal:4.2%
x264 [info]: ref P 68.3% 13.8% 10.6% 3.2% 4.0%
x264 [info]: ref B 78.5% 13.6% 6.0% 1.9%
x264 [info]: SSIM Mean Y:0.9941641
x264 [info]: PSNR Mean Y:45.713 U:48.582 V:47.726 Avg:46.363 Global:46.021 kb/s:233.82
encoded 2001 frames, 10.24 fps, 233.99 kb/s
desired video bitrate of this job: 22 kbit/s - obtained video bitrate (approximate): 236 kbit/s
之所以说非常好压,是因为848×480×23.976的片子,crf=22下压出来只有240kbps,呵呵~
下面就依照rouble的提醒把crf的值调整一下看看,rouble能否赐教一下以您的理解Trellis应该怎么用呢?我正是因为对这方面的讯息了解的较少所以才会把测试重点放在此处的,谢谢~