ffmpeg normalize command+verbose output

PS D:\videos> ffmpeg -v verbose -i webcam.mkv -vframes 1 -pix_fmt yuv420p -s 1600x896 -crf 18 -preset ultrafast -b:a 128k -vf "normalize=smoothing=30:independence=0" webcam-420-normalized-2.mp4
ffmpeg version N-93871-g8cf947ca4c Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 8.3.1 (GCC) 20190414
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
  libavutil      56. 28.100 / 56. 28.100
  libavcodec     58. 52.101 / 58. 52.101
  libavformat    58. 27.103 / 58. 27.103
  libavdevice    58.  7.100 / 58.  7.100
  libavfilter     7. 53.101 /  7. 53.101
  libswscale      5.  4.101 /  5.  4.101
  libswresample   3.  4.100 /  3.  4.100
  libpostproc    55.  4.100 / 55.  4.100
[matroska,webm @ 0000020335baa740] parser not found for codec ffv1, packets or times may be invalid.
    Last message repeated 1 times
Input #0, matroska,webm, from 'webcam.mkv':
  Metadata:
    ENCODER         : Lavf58.27.103
  Duration: 00:01:00.15, start: 0.000000, bitrate: 24240 kb/s
    Stream #0:0: Video: ffv1, 1 reference frame (FFV1 / 0x31564646), bgr0(progressive), 1600x896, 30 fps, 30 tbr, 1k tbn, 1k tbc (default)
    Metadata:
      ENCODER         : Lavc58.52.101 ffv1
      DURATION        : 00:01:00.150000000
    Stream #0:1: Audio: flac, 44100 Hz, mono, s16 (default)
    Metadata:
      ENCODER         : Lavc58.52.101 flac
      DURATION        : 00:01:00.000000000
Stream mapping:
  Stream #0:0 -> #0:0 (ffv1 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (flac (native) -> aac (native))
Press [q] to stop, [?] for help
[graph 0 input from stream 0:0 @ 00000203360ab880] w:1600 h:896 pixfmt:bgr0 tb:1/1000 fr:30/1 sar:0/1 sws_param:flags=2
[scaler_out_0_0 @ 0000020336a77080] w:1600 h:896 flags:'bicubic' interl:0
[scaler_out_0_0 @ 0000020336a77080] w:1600 h:896 fmt:bgr0 sar:0/1 -> w:1600 h:896 fmt:yuv420p sar:0/1 flags:0x4
[libx264 @ 0000020335c7d3c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX XOP FMA3 BMI1
[libx264 @ 0000020335c7d3c0] profile Constrained Baseline, level 4.0, 4:2:0, 8-bit
[libx264 @ 0000020335c7d3c0] 264 - core 157 r2970 5493be8 - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=18.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
*** 0 dup!
No more output streams to write to, finishing.
[graph_1_in_0_1 @ 0000020336b5a300] tb:1/44100 samplefmt:s16 samplerate:44100 chlayout:0x4
[format_out_0_1 @ 0000020336b5b400] auto-inserting filter 'auto_resampler_0' between the filter 'Parsed_anull_0' and the filter 'format_out_0_1'
[auto_resampler_0 @ 0000020336b5a700] ch:1 chl:mono fmt:s16 r:44100Hz -> ch:1 chl:mono fmt:fltp r:44100Hz
Finishing stream 0:1 without any data written to it.
Output #0, mp4, to 'webcam-420-normalized-2.mp4':
  Metadata:
    encoder         : Lavf58.27.103
    Stream #0:0: Video: h264 (libx264), 1 reference frame (avc1 / 0x31637661), yuv420p(progressive), 1600x896, q=-1--1, 30 fps, 15360 tbn, 30 tbc (default)
    Metadata:
      DURATION        : 00:01:00.150000000
      encoder         : Lavc58.52.101 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp (16 bit), delay 1024, 128 kb/s (default)
    Metadata:
      DURATION        : 00:01:00.000000000
      encoder         : Lavc58.52.101 aac
frame=    1 fps=0.0 q=15.0 Lsize=     253kB time=00:00:00.00 bitrate=31903753.8kbits/s dup=1 drop=1 speed=0.000195x
video:252kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.308023%
Input file #0 (webcam.mkv):
  Input stream #0:0 (video): 8 packets read (2038560 bytes); 2 frames decoded;
  Input stream #0:1 (audio): 5 packets read (14958 bytes); 1 frames decoded (4608 samples);
  Total: 13 packets (2053518 bytes) demuxed
Output file #0 (webcam-420-normalized-2.mp4):
  Output stream #0:0 (video): 1 frames encoded; 1 packets muxed (258422 bytes);
  Output stream #0:1 (audio): 0 frames encoded (0 samples); 0 packets muxed (0 bytes);
  Total: 1 packets (258422 bytes) muxed
[AVIOContext @ 0000020335baed40] Statistics: 2 seeks, 4 writeouts
[libx264 @ 0000020335c7d3c0] frame I:1     Avg QP:15.00  size:257822
[libx264 @ 0000020335c7d3c0] mb I  I16..4: 100.0%  0.0%  0.0%
[libx264 @ 0000020335c7d3c0] coded y,uvDC,uvAC intra: 74.6% 74.8% 74.2%
[libx264 @ 0000020335c7d3c0] i16 v,h,dc,p: 44% 23% 28%  5%
[libx264 @ 0000020335c7d3c0] i8c dc,h,v,p: 46% 27% 20%  7%
[libx264 @ 0000020335c7d3c0] kb/s:61877.28
[aac @ 0000020335bace40] Qavg: nan
[AVIOContext @ 0000020335bb38c0] Statistics: 2054612 bytes read, 0 seeks