[多媒体] OpenMax / DirectShow / FFmpeg

• ​​OpenMax​​​ is an​​API​​ 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

https://stackoverflow.com/questions/69959931/id-like-to-know-the-relations-among-openmax-directshow-and-ffmpeg​​