[Snowknight26]

I have to say, the bitrate difference can be enormous sometimes:

C:\temp\Encoding>avs2yuv -raw test/test.avs -   | x264_mbtree_x64 --crf 19 --mbt
ree --bframes 0 --b-adapt 0 --ref 0 --direct spatial --deblock -3:-3 --subme 1 -
-trellis 0 --analyse all --me umh --ssim --fps 24000/1001 --output "test/test.mb
tree.mkv" - 1920x816
x264 [info]: 1920x816 @ 23.98 fps
x264 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64
x264 [info]: profile High, level 4.0
test/test.avs: 1920x816, 10000000/417083 fps, 1378 frames
x264 [info]: slice I:20    Avg QP:14.02  size:131728
x264 [info]: slice P:1358  Avg QP:15.01  size: 37773
x264 [info]: mb I  I16..4: 24.8% 47.2% 28.0%
x264 [info]: mb P  I16..4: 22.4% 18.9%  1.6%  P16..4: 35.4%  8.6%  1.8%  0.1%  0
.0%    skip:11.2%
x264 [info]: 8x8 transform  intra:44.2%  inter:41.4%
x264 [info]: coded y,uvDC,uvAC intra:35.8% 87.5% 74.4% inter:13.7% 58.9% 19.6%
x264 [info]: SSIM Mean Y:0.9929551
x264 [info]: kb/s:7506.7

encoded 1378 frames, 30.29 fps, 7506.94 kb/s

C:\temp\Encoding>avs2yuv -raw test/test.avs -   | x264.x64 --crf 19 --bframes 0
--b-adapt 0 --ref 0 --direct spatial --deblock -3:-3 --subme 1 --trellis 0 --ana
lyse all --me umh --ssim --fps 24000/1001 --output "test/test.mkv" - 1920x816
x264 [info]: 1920x816 @ 23.98 fps
x264 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64
x264 [info]: profile High, level 4.0
test/test.avs: 1920x816, 10000000/417083 fps, 1378 frames
x264 [info]: slice I:21    Avg QP:10.66  size:187241
x264 [info]: slice P:1357  Avg QP:11.45  size: 73091
x264 [info]: mb I  I16..4: 23.5% 37.2% 39.3%
x264 [info]: mb P  I16..4: 20.8% 17.8%  5.0%  P16..4: 32.7% 10.9%  4.0%  0.4%  0
.1%    skip: 8.4%
x264 [info]: 8x8 transform  intra:40.7%  inter:31.8%
x264 [info]: coded y,uvDC,uvAC intra:51.6% 88.9% 81.5% inter:36.5% 73.8% 41.9%
x264 [info]: SSIM Mean Y:0.9953622
x264 [info]: kb/s:14353.1

encoded 1378 frames, 26.12 fps, 14353.34 kb/s