H.265 Codec: B-Frame Settings
Number of B-Frames
Number of B-frames between I and P
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Adaptive B-Frame
Set the level of effort in determining B frame placement.
With b-adapt 0, the GOP structure is fixed based on the values of --keyint and --bframes.
With b-adapt 1 a light lookahead is used to choose B frame placement.
With b-adapt 2 (trellis) a viterbi B path selection is performed
Values: 0:none; 1:fast; 2:full(trellis) default
Use B-frames as references
Use B-frames as references, when possible
Weighted B-Prediction
Enable weighted prediction in B slices.
B-Frame bias
Bias towards B frames in slicetype decision.
The higher the bias the more likely x265 is to use B frames.
Can be any value between -90 and 100 and is clipped to that range.