Quote:
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--keint 50 --gop-lookahead 25
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My interpretation is that the nominal GOP length would be 50, but that it might be as high as 75 in some cases, if a scenecut is found within that extra 25 frames.
Put another way, starting at frame 0, assuming scene change detection is not triggered from frames 0-49, frame 50 will be an IDR... UNLESS frames 51-74 are flagged by scene change detection, in which case the earliest of those will be the IDR.
At least.. I think I did the math right there
I always have to think twice about duration vs frame number etc!