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Update and rename 038-.md to 038-HEVC码流分析.md

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# HEVC码流分析
初步分析了一下HEVC的码流。
使用了Elecard HEVC Analyzer打开了一个《阿凡达>720P的视频片段
P帧得到如下结果：
宏块划分
![image](https://user-images.githubusercontent.com/87458342/127624409-3feab762-ee7b-4042-9e3a-8a4d317ef572.png)
运动矢量：
![image](https://user-images.githubusercontent.com/87458342/127624455-8060f77a-d377-4de6-9f4e-5a1555d337d0.png)
CU的大小：
![image](https://user-images.githubusercontent.com/87458342/127624475-fd91e3f6-f9e1-4706-a2ce-8629333f51c9.png)
QP：
![image](https://user-images.githubusercontent.com/87458342/127624498-8ffd3607-5a58-4a76-99a5-964066651b78.png)
注：分析过程中发现QP值是恒定的
B帧得到如下结果：
宏块划分：
![image](https://user-images.githubusercontent.com/87458342/127624557-f5ecb91c-333e-49c6-94d3-d1e511fd4b79.png)
运动矢量：
![image](https://user-images.githubusercontent.com/87458342/127624531-f5d90b5d-bb1f-4e9a-b91b-615d64e2ad9b.png)
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原文作者： 雷霄骅