I couldnt find any code that extracts I,P,B frames from video using FFMPEG library. How should i do that? First stage would be using VideoCapture from OpenCV i guess. My end goal is doing this with C# using FFMPEG.Autogen but at this stage any information with C, C++ would also be helpful, Thanks.

I tried to look at different source codes and implementations of FFMPEG but i was unsuccessfull. I am waiting for help.