frames size 图可以看到码流分布情况，所有的图x轴为帧数时间轴，由此可以得知影片时间的大致位置对应的具体情况。图为2帧平均显示_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
compressibility 图显示影片可压缩性，50 parts of 140 frames_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
motion 运动侦测情况，红线为kblk，黑色为mblk。可以看到影片结尾部分的运动情况比较剧烈。_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
PSNR 图，x264 使用 ffdshow-20051129 来解码。另外也可以使用最新 nero 7 的解码器来解码，终于修正了B帧的问题了，不过nero 7在解码器上做了手脚，能被它自己播放器调用。我使用MPC播放时出现错误的提示，尽管这样，还是可以通过使用秘籍来调用的。经过测试，解码的结果和 ffdshow是一样的，但速度比 ffdshow快。_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
可以见到两者的曲线特性很相似，压不好的地方两者一起压不好，压得好的地方两者一起压得好，所不同的是x264的PSNR平均都高出xvid的。_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
所有编码和解码过程都关闭PP,按照PSNR曲线图上标明的各点所在位置进行截图比较,以下所有的图片统一由Avisynth做YV12->RGB,codec输出YV12,而不是由Codec解码为RGB_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
选点截图通常为PSNR曲线的低值区间，没有特别说明的都是为P帧的截图_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
图片顺序依次为：视源－x264－xvid_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
#120 a点PSNR x264：41.8131 xvid：40.0544_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
此段的色彩较丰富，PSNR在整段视频中很低，由于高频比例较大，画面非常难压。对比一下之前的frames size 和 motion 图，可知道这是静态的场景，但是码流分配很高。不过画面都是花丛，看起来比较乱，就算压得不好，如果不看源来的画面，也不容易察觉出来。_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
#1446 b点PSNR x264：41.3295 xvid：40.7515_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
这里是花丛被风吹动的场景，从frames size 和 motion 图看到，这里是全片码流最高的地方，但是只有很小的动态画面。2个Codec都压得不好，可见是一些很难压缩的画面。_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
#1448 PSNR x264：40.9214 xvid：38.3576_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
这是接着的B帧的情况，xvid的情况很差，画面瑕疵很多_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ
_k=3f+~C~auR9mFdW1Hse/4kNhVuMwk;v{~KM~iWp!pWi^SUjC^4=]i0gq##&o?50d@YPylBhX本文来自：Ｖ电Ｇ玩Ｓ天Ｋ空Ｙ