ffmpeg -i SIMPSONS\ PIXELS-FIZ_gDOrzGk.mp4 -i palette.png -sws_dither none -lavfi "sws_flags=neighbor;paletteuse,crop=1280:720:0:0,scale=192:108,format=pix_fmts=rgb24"  output32.gif
ffmpeg version N-70767-gd24af70 Copyright (c) 2000-2015 the FFmpeg developers
  built with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
  configuration: --prefix=/home/florian/linux
  libavutil      54. 20.100 / 54. 20.100
  libavcodec     56. 28.100 / 56. 28.100
  libavformat    56. 25.101 / 56. 25.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 12.100 /  5. 12.100
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  1.100 /  1.  1.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'SIMPSONS PIXELS-FIZ_gDOrzGk.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    creation_time   : 2015-02-02 00:40:31
  Duration: 00:01:52.01, start: 0.000000, bitrate: 1691 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 1497 kb/s, 24 fps, 24 tbr, 24 tbn, 48 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 192 kb/s (default)
    Metadata:
      creation_time   : 2015-02-02 00:40:32
      handler_name    : IsoMedia File Produced by Google, 5-11-2011
Input #1, png_pipe, from 'palette.png':
  Duration: N/A, bitrate: N/A
    Stream #1:0: Video: png, rgba, 16x16 [SAR 1:1 DAR 1:1], 25 tbr, 25 tbn, 25 tbc
File 'output32.gif' already exists. Overwrite ? [y/N] y
Output #0, gif, to 'output32.gif':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    encoder         : Lavf56.25.101
    Stream #0:0: Video: gif, bgr8, 192x108 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 24 fps, 100 tbn, 24 tbc (default)
    Metadata:
      encoder         : Lavc56.28.100 gif
Stream mapping:
  Stream #0:0 (h264) -> paletteuse:default
  Stream #1:0 (png) -> paletteuse:palette
  format -> Stream #0:0 (gif)
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