Stutter video sample on ng build

This sample video,Will stutter at 44s, and when it stuttering, press left or right key, the stutter will disapear, I tried it on N2 and Vim3(with the last nightbuild), but it plays fine on odroid c2 .

		General
	Unique ID                                : 143635678710275276371748977592275805906 (0x6C0F39B878836114C86F992961BFA6D2)
	Complete name                            : G:\20191113\Stutter 4K.sample.mkv
	Format                                   : Matroska
	Format version                           : Version 4
	File size                                : 198 MiB
	Duration                                 : 1 min 58 s
	Overall bit rate mode                    : Variable
	Overall bit rate                         : 14.1 Mb/s
	Encoded date                             : UTC 2019-11-25 06:23:48
	Writing application                      : mkvmerge v25.0.0 ('Prog Noir') 64-bit
	Writing library                          : libebml v1.3.6 + libmatroska v1.4.9

	Video
	ID                                       : 1
	Format                                   : HEVC
	Format/Info                              : High Efficiency Video Coding
	Format profile                           : Main 10@L5.1@High
	HDR format                               : SMPTE ST 2086, HDR10 compatible
	Codec ID                                 : V_MPEGH/ISO/HEVC
	Duration                                 : 1 min 58 s
	Bit rate                                 : 11.4 Mb/s
	Width                                    : 3 840 pixels
	Height                                   : 1 606 pixels
	Display aspect ratio                     : 2.40:1
	Frame rate mode                          : Variable
	Frame rate                               : 23.942 FPS
	Original frame rate                      : 23.976 (24000/1001) FPS
	Color space                              : YUV
	Chroma subsampling                       : 4:2:0 (Type 2)
	Bit depth                                : 10 bits
	Bits/(Pixel*Frame)                       : 0.077
	Stream size                              : 160 MiB (81%)
	Title                                    : 
	Writing library                          : x265 3.2+8-7fc1f6ef2b96:[Windows][GCC 9.2.1][64 bit] 10bit
	Encoding settings                        : cpuid=1111039 / frame-threads=4 / numa-pools=24 / wpp / no-pmode / no-pme / no-psnr / no-ssim / log-level=2 / input-csp=1 / input-res=3840x1606 / interlace=0 / total-frames=174146 / level-idc=51 / high-tier=1 / uhd-bd=0 / ref=4 / no-allow-non-conformance / repeat-headers / annexb / aud / hrd / info / hash=0 / no-temporal-layers / no-open-gop / min-keyint=1 / keyint=24 / gop-lookahead=0 / bframes=4 / b-adapt=2 / b-pyramid / bframe-bias=0 / rc-lookahead=25 / lookahead-slices=4 / scenecut=40 / radl=0 / no-splice / no-intra-refresh / ctu=64 / min-cu-size=8 / rect / no-amp / max-tu-size=32 / tu-inter-depth=1 / tu-intra-depth=1 / limit-tu=0 / rdoq-level=2 / dynamic-rd=0.00 / no-ssim-rd / signhide / no-tskip / nr-intra=0 / nr-inter=0 / no-constrained-intra / no-strong-intra-smoothing / max-merge=3 / limit-refs=3 / limit-modes / me=3 / subme=3 / merange=57 / temporal-mvp / no-frame-dup / no-hme / weightp / no-weightb / no-analyze-src-pics / deblock=-3:-3 / no-sao / no-sao-non-deblock / rd=4 / selective-sao=0 / no-early-skip / rskip / no-fast-intra / no-tskip-fast / no-cu-lossless / no-b-intra / no-splitrd-skip / rdpenalty=0 / psy-rd=2.00 / psy-rdoq=1.00 / no-rd-refine / no-lossless / cbqpoffs=0 / crqpoffs=0 / rc=crf / crf=17.0 / qcomp=0.60 / qpstep=4 / stats-write=0 / stats-read=0 / vbv-maxrate=160000 / vbv-bufsize=160000 / vbv-init=0.9 / crf-max=0.0 / crf-min=0.0 / ipratio=1.40 / pbratio=1.30 / aq-mode=2 / aq-strength=1.00 / cutree / zone-count=0 / no-strict-cbr / qg-size=32 / no-rc-grain / qpmax=69 / qpmin=0 / no-const-vbv / sar=1 / overscan=0 / videoformat=5 / range=0 / colorprim=9 / transfer=16 / colormatrix=9 / chromaloc=1 / chromaloc-top=2 / chromaloc-bottom=2 / display-window=0 / master-display=G(13250,34500)B(7500,3000)R(34000,16000)WP(15635,16450)L(10000000,10) / cll=1000,634 / min-luma=0 / max-luma=1023 / log2-max-poc-lsb=8 / vui-timing-info / vui-hrd-info / slices=1 / no-opt-qp-pps / no-opt-ref-list-length-pps / no-multi-pass-opt-rps / scenecut-bias=0.05 / no-opt-cu-delta-qp / no-aq-motion / hdr / hdr-opt / no-dhdr10-opt / no-idr-recovery-sei / analysis-reuse-level=5 / scale-factor=0 / refine-intra=0 / refine-inter=0 / refine-mv=1 / refine-ctu-distortion=0 / no-limit-sao / ctu-info=0 / no-lowpass-dct / refine-analysis-type=0 / copy-pic=1 / max-ausize-factor=1.0 / no-dynamic-refine / no-single-sei / no-hevc-aq / no-svt / no-field / qp-adaptation-range=1.00
	Default                                  : Yes
	Forced                                   : No
	Color range                              : Limited
	Color primaries                          : BT.2020
	Transfer characteristics                 : PQ
	Matrix coefficients                      : BT.2020 non-constant
	Mastering display color primaries        : Display P3
	Mastering display luminance              : min: 0.0010 cd/m2, max: 1000 cd/m2
	Maximum Content Light Level              : 1000 cd/m2
	Maximum Frame-Average Light Level        : 634 cd/m2

	Audio
	ID                                       : 2
	Format                                   : MLP FBA 16-ch
	Format/Info                              : Meridian Lossless Packing FBA with 16-channel presentation
	Commercial name                          : Dolby TrueHD with Dolby Atmos
	Codec ID                                 : A_TRUEHD
	Duration                                 : 1 min 57 s
	Bit rate mode                            : Variable
	Bit rate                                 : 2 596 kb/s
	Maximum bit rate                         : 5 010 kb/s
	Channel(s)                               : 8 channels
	Channel layout                           : L R C LFE Ls Rs Lb Rb
	Sampling rate                            : 48.0 kHz
	Frame rate                               : 1 200.000 FPS (40 SPF)
	Compression mode                         : Lossless
	Stream size                              : 36.5 MiB (18%)
	Title                                    : English Dolby TrueHD with Dolby Atmos (TrueHD)
	Language                                 : English
	Default                                  : Yes
	Forced                                   : No
	Number of dynamic objects                : 11
	Bed channel count                        : 1 channel
	Bed channel configuration                : LFE

@startv thanks for this sample, I’ve tested this sample with our upcoming experimental kernel and there is no visible stutter so this will be fixed in the near future.

There is something very strange with that encode the frame rate shows as variable and is different to the proper frame rate. I fixed the framerate using mkvtoolnix ,fix bit-stream timing, but it still skips after 40 seconds.

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