a1ba@a1ba-KubuntuPC:~/dk/ffmpeg-git-20190320-amd64-static$ ./ffmpeg -i in.mp4 -pix_fmt yuv420p -movflags faststart -preset medium -c:a copy -c:v libx264 -g 60 -crf 28 -vf scale=3840:3840 out-4K-H264-CFR28.mp4
ffmpeg version N-48443-g6dc1da416e-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
  configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid --enable-libzvbi --enable-libzimg
  libavutil      56. 26.100 / 56. 26.100
  libavcodec     58. 47.105 / 58. 47.105
  libavformat    58. 26.101 / 58. 26.101
  libavdevice    58.  7.100 / 58.  7.100
  libavfilter     7. 48.100 /  7. 48.100
  libswscale      5.  4.100 /  5.  4.100
  libswresample   3.  4.100 /  3.  4.100
  libpostproc    55.  4.100 / 55.  4.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x5b9d4c0] decoding for stream 0 failed
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'in.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.71.100
  Duration: 00:01:00.10, start: 0.009000, bitrate: 402368 kb/s
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 7680x7680, 402060 kb/s, SAR 1:1 DAR 1:1, 29.97 fps, 29.97 tbr, 29971 tbn, 59.94 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 317 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
[libx264 @ 0x5bf0d80] using SAR=1/1   0kB time=-577014:32:22.77 bitrate=  -0.0kbits/s speed=N/A
[libx264 @ 0x5bf0d80] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x5bf0d80] profile Progressive High, level 6.0, 4:2:0, 8-bit
[libx264 @ 0x5bf0d80] 264 - core 157 r2969 d4099dd - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=18 lookahead_threads=3 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=60 keyint_min=6 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=28.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
[mp4 @ 0x5ba5680] track 1: codec frame size is not set
Output #0, mp4, to 'out-4K-H264-CFR28.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.26.101
    Stream #0:0(und): Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 3840x3840 [SAR 1:1 DAR 1:1], q=-1--1, 29.97 fps, 30k tbn, 29.97 tbc (default)
    Metadata:
      handler_name    : VideoHandler
      encoder         : Lavc58.47.105 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 317 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
[mp4 @ 0x5ba5680] Starting second pass: moving the moov atom to the beginning of the filerop=0 speed=0.396x
frame= 1802 fps= 12 q=-1.0 Lsize=   63103kB time=00:01:00.07 bitrate=8604.9kbits/s dup=1 drop=0 speed=0.392x
video:60709kB audio:2328kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.104388%
[libx264 @ 0x5bf0d80] frame I:31    Avg QP:24.35  size:1126514
[libx264 @ 0x5bf0d80] frame P:461   Avg QP:26.36  size: 38474
[libx264 @ 0x5bf0d80] frame B:1310  Avg QP:31.63  size:  7257
[libx264 @ 0x5bf0d80] consecutive B-frames:  2.3%  1.1%  3.3% 93.2%
[libx264 @ 0x5bf0d80] mb I  I16..4: 14.5% 50.4% 35.1%
[libx264 @ 0x5bf0d80] mb P  I16..4:  0.5%  0.7%  0.1%  P16..4: 11.9%  1.9%  1.5%  0.0%  0.0%    skip:83.4%
[libx264 @ 0x5bf0d80] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  6.3%  0.3%  0.1%  direct: 0.1%  skip:93.1%  L0:29.9% L1:68.6% BI: 1.4%
[libx264 @ 0x5bf0d80] 8x8 transform intra:50.7% inter:77.3%
[libx264 @ 0x5bf0d80] coded y,uvDC,uvAC intra: 62.2% 74.7% 38.6% inter: 1.1% 2.0% 0.0%
[libx264 @ 0x5bf0d80] i16 v,h,dc,p: 14% 58%  8% 19%
[libx264 @ 0x5bf0d80] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 14% 32% 16%  5%  5%  5%  9%  4% 10%
[libx264 @ 0x5bf0d80] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 21% 29% 10%  5%  7%  6% 10%  5%  8%
[libx264 @ 0x5bf0d80] i8c dc,h,v,p: 42% 37% 14%  8%
[libx264 @ 0x5bf0d80] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x5bf0d80] ref P L0: 69.9% 11.7% 13.8%  4.7%
[libx264 @ 0x5bf0d80] ref B L0: 79.2% 16.8%  4.0%
[libx264 @ 0x5bf0d80] ref B L1: 92.3%  7.7%
[libx264 @ 0x5bf0d80] kb/s:8271.20