xml - XML After Effect File (*.aepx) -> 了解二进制数字格式以编辑 xml 文件

Question

我正在尝试了解 After Effect CS6 和 CC 的 aepx 文件的数字格式

坐标以 cdat 十六进制数据编码。坐标是两个数字。我已经用编码的十六进制值制作了一个数字列表，以帮助理解格式：

-100;-100   -> <cdat bdata="bfaaaaaaaaaaaaabbfb7b425ed097b420000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"/>

100;100     -> <cdat bdata="3faaaaaaaaaaaaab3fb7b425ed097b420000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"/>

100;200     -> <cdat bdata="3faaaaaaaaaaaaab3fc7b425ed097b420000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"/>

200;100     -> <cdat bdata="3fbaaaaaaaaaaaab3fb7b425ed097b420000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"/>

200;200     -> <cdat bdata="3fbaaaaaaaaaaaab3fc7b425ed097b420000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"/>

300;300     -> <cdat bdata="3fc40000000000003fd1c71c71c71c720000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"/>

800;200     -> <cdat bdata="3fdaaaaaaaaaaaab3fc7b425ed097b420000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"/>

800;400     -> <cdat bdata="3fdaaaaaaaaaaaab3fd7b425ed097b420000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"/>

800,5;400   -> <cdat bdata="3fdaaeeeeeeeeeef3fd7b425ed097b420000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"/>

800,5;400,5 -> <cdat bdata="3fdaaeeeeeeeeeef3fd7bbbbbbbbbbbc0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"/>

0;400,5     -> <cdat bdata="00000000000000003fd7bbbbbbbbbbbc0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"/>

800,5;0     -> <cdat bdata="3fdaaeeeeeeeeeef00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"/>

400,5;800,5 -> <cdat bdata="3fcab333333333333fe7b7f0d4629b7f0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"/>

有人知道这种数字格式吗？

Answer 1

不确定它是否仍然相关，但是我发现它是双重表示（大端）

-100;-100   -> -0.0520833333333333 -0.0925925925925926
100;100     ->  0.0520833333333333  0.0925925925925926
200;100     ->  0.104166666666667   0.0925925925925926
200;200     ->  0.104166666666667   0.185185185185185
800;200     ->  0.416666666666667   0.185185185185185
800;400     ->  0.416666666666667   0.37037037037037
800,5;400   ->  0.416927083333333   0.37037037037037
0;400,5     ->  0.000000000000000   0.370833333333333
400,5;800,5 ->  0.20859375          0.741203703703704

但是，正如您所料，这些值并不是精确的像素，它们代表一个系数。它们中的每一个都应分别乘以您的构图宽度和高度。

据我所知，您的分辨率为 1920x1080：

0.416927083333333 * 1920 = 800.4999999999993

PS我正在研究aepx格式，如果你想贡献：https ://github.com/inlife/aftereffects-project-research