[Libav-user] Find Type Frame IPB MPEG - Need Help

[Yulius Candra]

Dear All,

Hello, I
Currently i am working project Video Streaming Encryption with file video format MPEG,
then frame that i want to encrypt are just Frame I from MPEG.

Therefore I am want to using .FFMPEG libarry to get the picture/frame,
but i dont know to find type frame I P B form MPEG file video.  SO i need yours help   to find Frame I.

Addtional Information,,I using C# .net.
Thanks for your help!
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