17:11 [~/.dosbox/capture]$ ffmpeg -v verbose -i sierra_002.avi -map 0:0 -vf scale=1600:1200:sws_flags=neighbor,scale=960:720:sws_flags=bilinear -c:v libx264rgb -crf 0 sq1_test_chain.mkv
ffmpeg version 3.4.2 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 7.3.0 (GCC)
  configuration: --prefix=/usr --disable-debug --disable-static --disable-stripping --enable-avisynth --enable-avresample --enable-fontconfig --enable-gmp --enable-gnutls --enable-gpl --enable-ladspa --enable-libass --enable-libbluray --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libiec61883 --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxml2 --enable-libxvid --enable-shared --enable-version3 --enable-omx
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
Invalid return value 0 for stream protocol
    Last message repeated 1 times
[avi @ 0x560784ccaa80] parser not found for codec zmbv, packets or times may be invalid.
[avi @ 0x560784ccaa80] parser not found for codec pcm_s16le, packets or times may be invalid.
[avi @ 0x560784ccaa80] parser not found for codec zmbv, packets or times may be invalid.
[avi @ 0x560784ccaa80] parser not found for codec pcm_s16le, packets or times may be invalid.
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, avi, from 'sierra_002.avi':
  Duration: 00:00:14.17, start: 0.000000, bitrate: 1450 kb/s
    Stream #0:0: Video: zmbv, 1 reference frame (ZMBV / 0x56424D5A), pal8, 320x200, 17 kb/s, 59.92 fps, 59.92 tbr, 59.92 tbn, 59.92 tbc
    Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s16, 1411 kb/s
File 'sq1_test_chain.mkv' already exists. Overwrite ? [y/N] y
Stream mapping:
  Stream #0:0 -> #0:0 (zmbv (native) -> h264 (libx264rgb))
Press [q] to stop, [?] for help
[Parsed_scale_0 @ 0x560784d1cfa0] w:1600 h:1200 flags:'bilinear' interl:0
[Parsed_scale_1 @ 0x560784d1d8c0] w:960 h:720 flags:'bilinear' interl:0
[graph 0 input from stream 0:0 @ 0x560784d1e360] w:320 h:200 pixfmt:pal8 tb:250000/14980681 fr:14980681/250000 sar:0/1 sws_param:flags=2
[Parsed_scale_0 @ 0x560784d1cfa0] w:320 h:200 fmt:pal8 sar:0/1 -> w:1600 h:1200 fmt:pal8 sar:0/1 flags:0x2
[Parsed_scale_1 @ 0x560784d1d8c0] w:1600 h:1200 fmt:pal8 sar:0/1 -> w:960 h:720 fmt:rgb24 sar:0/1 flags:0x2
[libx264rgb @ 0x560784d22060] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX XOP FMA3 BMI1
[libx264rgb @ 0x560784d22060] profile High 4:4:4 Predictive, level 3.2, 4:4:4 8-bit
[libx264rgb @ 0x560784d22060] 264 - core 152 r2854 e9a5903 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=0 mixed_ref=1 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=0 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=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc=cqp mbtree=0 qp=0
Output #0, matroska, to 'sq1_test_chain.mkv':
  Metadata:
    encoder         : Lavf57.83.100
    Stream #0:0: Video: h264 (libx264rgb), 1 reference frame (H264 / 0x34363248), rgb24, 960x720, q=-1--1, 59.92 fps, 1k tbn, 59.92 tbc
    Metadata:
      encoder         : Lavc57.107.100 libx264rgb
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Invalid return value 0 for stream protocoltime=00:00:13.88 bitrate=10779.7kbits/s speed=0.325x    
    Last message repeated 1 times
No more output streams to write to, finishing.
frame=  849 fps= 20 q=-1.0 Lsize=   21375kB time=00:00:14.15 bitrate=12372.4kbits/s speed=0.33x    
video:21369kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.030852%
Input file #0 (sierra_002.avi):
  Input stream #0:0 (video): 849 packets read (30944 bytes); 849 frames decoded; 
  Input stream #0:1 (audio): 1 packets read (2824 bytes); 
  Total: 850 packets (33768 bytes) demuxed
Output file #0 (sq1_test_chain.mkv):
  Output stream #0:0 (video): 849 frames encoded; 849 packets muxed (21881644 bytes); 
  Total: 849 packets (21881644 bytes) muxed
[libx264rgb @ 0x560784d22060] frame I:4     Avg QP: 0.00  size:382730
[libx264rgb @ 0x560784d22060] frame P:845   Avg QP: 0.00  size: 24083
[libx264rgb @ 0x560784d22060] mb I  I16..4: 56.2%  0.0% 43.8%
[libx264rgb @ 0x560784d22060] mb P  I16..4:  1.1%  0.0%  0.1%  P16..4: 12.4%  3.3%  1.2%  0.0%  0.0%    skip:81.9%
[libx264rgb @ 0x560784d22060] coded y,u,v intra: 46.2% 30.8% 84.8% inter: 3.1% 4.8% 4.2%
[libx264rgb @ 0x560784d22060] i16 v,h,dc,p: 63%  6% 30%  1%
[libx264rgb @ 0x560784d22060] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 29% 30%  4%  5%  3%  3%  2%  1%
[libx264rgb @ 0x560784d22060] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264rgb @ 0x560784d22060] ref P L0: 40.8%  2.3% 13.2% 43.8%
[libx264rgb @ 0x560784d22060] kb/s:12355.01