- OpenMax is anAPI specification
- DirectShow is an API specification and an implementation of that API
- FFmpeg provides libraries, and libraries are implementations of API specifications
参考：I'd like to know the relations among openmax, directshow and ffmpeg - Stack Overflow
![[多媒体] OpenMax / DirectShow / FFmpeg_linq](http://dev-img.mos.moduyun.com/20231025/f107db99-4d9a-48bf-8c88-2f10e78c24d2.png "icon-default.png?t=LBL2")