How to read b-frame stats?

I noticed this statement among others into final x265 statistics and I just can't understand what it means: Code:

The first value is for zero consecutive B-frames, like in a sequence 'IPBP'. If you enable csv logging, you can see how the frame types are in the final encode along with other stats.

I0 - 0 B-frames following P1 - 8 B-frames following P10 - 5 B-frames following P16 - 8 B-frames following Result: 0 B-frames: 1/4=25%, 5 B-frames: 1/4=25%, 8 B-frames: 2/4=50%

OH thanks :eek: I see now the percentage is calculated with respect to possible placements, NOT the total bframes amount. Feeling newbie...