已接受的解答
并没有详细的说明，只能去猜测。这个是开源的，如果看得懂可以去看看代码：
https://github.com/alembic/alembic/blob/master/maya/AbcImport/AbcImport.cpp
Tony Su
Product Support
Alembic is an open framework for storing and sharing scene data that includes a C++ library, a file format, and client plugins and applications. - alembic/maya/AbcImport/AbcImport.cpp at master · alembic/alembic
