Hello,       I want the GOP structure after mpeg2video coding to be 
IBBPBBPBBPBB, but the GOP structure in the encoded out put file is IPBBPBBPBB. 
How do I set the coding parameters? The following is the command I run:
      ffmpeg.exe -i L:\input.mp4 -vcodec mpeg2video -g 12 -bf 2 -flags +cgop 
-sc_threshold 1000000000 -y L:\output.m2v

thanks



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