QSVEncC --la/--la-hrdで指定したBitrateがログに出ない

■QSVEncC
cop2.LookAheadDepth value changed 0 -> 40 by driver
QSVEncC (x64) 2.70 (r1337) by rigaya, Jun 20 2017 22:37:08 (VC 1900/Win/avx2)
OS             Windows 10 x64 (14393)
CPU Info       Intel Core i7-4702MQ @ 2.20GHz [TB: 2.90GHz] (4C/8T) <Haswell>
GPU Info       Intel HD Graphics 4600 (20EU) 200-1150MHz [37W] (20.19.15.4531)
Media SDK      QuickSyncVideo (hardware encoder) PG, 1st GPU, API v1.19
Async Depth    4 frames
Buffer Memory  d3d9, 3 input buffer, 52 work buffer
Input Info     Avisynth 2.60(yv12)->nv12 [AVX2], 1920x1080, 30000/1001 fps
Output         H.264/AVC  High @ Level 4
               1920x1080p 1:1 29.970fps (30000/1001fps)
               avwriter: h264 => mp4
Target usage   4 - balanced
Encode Mode    Bitrate Mode - Lookahead
Lookahead      depth 40 frames, quality medium
Windowed RC    off
QP Limit       min: none, max: none
Trellis        Auto
Ref frames     3 frames
Bframes        3 frames, B-pyramid: on
Max GOP Length 300 frames

■QSVEnc
qsv [warn]: cop2.LookAheadDepth value changed 0 -> 40 by driver
qsv [warn]: cop2.BRefType value changed 2 -> 1 by driver
qsv [info]: QSVEnc (x86) 2.70 (r1337) by rigaya, Jun 20 2017 22:35:39 (VC 1900/Win/avx2)
qsv [info]: OS             Windows 10 x64 (14393)
qsv [info]: CPU Info       Intel Core i7-4702MQ @ 2.20GHz [TB: 2.90GHz] (4C/8T) <Haswell>
qsv [info]: GPU Info       Intel HD Graphics 4600 (20EU) 200-1150MHz [37W] (20.19.15.4531)
qsv [info]: Media SDK      QuickSyncVideo (hardware encoder) PG, 1st GPU, API v1.19
qsv [info]: Async Depth    4 frames
qsv [info]: Buffer Memory  d3d9, 3 input buffer, 52 work buffer
qsv [info]: Input Info     auo(yuy2)->nv12 [AVX2], 1280x720, 30000/1001 fps
qsv [info]: Output         H.264/AVC  High @ Level 3.1
qsv [info]:                1280x720p 1:1 29.970fps (30000/1001fps)
qsv [info]: Target usage   4 - balanced
qsv [info]: Encode Mode    Bitrate Mode - Lookahead
qsv [info]: Lookahead      depth 40 frames, quality medium
qsv [info]: Windowed RC    30 frames, Max 15000 kbps
qsv [info]: QP Limit       min: none, max: none
qsv [info]: Trellis        Auto
qsv [info]: Ref frames     2 frames
qsv [info]: Bframes        3 frames, B-pyramid: off
qsv [info]: Max GOP Length 300 frames