ffmpeg -threads 8 -y -i Testfile.5min.mkv -an -vcodec libx264 -crf 20 -sar 1:1 -profile:v main -preset:v fast -r 25 -vf yadif=0,crop=714:574:4:2,scale=714:400,setdar=1.77777777777777777777 -sws_flags lanczos foo.h264

ffmpeg version N-83105-g743052e Copyright (c) 2000-2017 the FFmpeg developers
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
  configuration: --enable-gpl --enable-libfdk-aac --enable-libx264 --enable-nonfree
  libavutil      55. 43.100 / 55. 43.100
  libavcodec     57. 72.100 / 57. 72.100
  libavformat    57. 62.100 / 57. 62.100
  libavdevice    57.  2.100 / 57.  2.100
  libavfilter     6. 69.100 /  6. 69.100
  libswscale      4.  3.101 /  4.  3.101
  libswresample   2.  4.100 /  2.  4.100
  libpostproc    54.  2.100 / 54.  2.100
Input #0, matroska,webm, from 'Testfile.5min.mkv':
  Metadata:
    ENCODER         : Lavf54.63.104
  Duration: 00:05:03.48, start: 0.015000, bitrate: 4445 kb/s
    Stream #0:0: Video: mpeg2video (Main), yuv420p(tv, top first), 720x576 [SAR 64:45 DAR 16:9], SAR 1:1 DAR 5:4, 25 fps, 25 tbr, 1k tbn, 50 tbc (default)
    Stream #0:1(swe): Audio: mp2, 48000 Hz, stereo, s16p, 192 kb/s (default)
    Stream #0:2(nor): Audio: mp2, 48000 Hz, stereo, s16p, 192 kb/s (default)
    Stream #0:3(dan): Audio: mp2, 48000 Hz, stereo, s16p, 192 kb/s (default)
    Stream #0:4(fin): Audio: mp2, 48000 Hz, stereo, s16p, 192 kb/s (default)
    Stream #0:5(eng): Audio: mp3, 48000 Hz, stereo, s16p, 192 kb/s (default)
[libx264 @ 0x2950f00] using SAR=1/1
[libx264 @ 0x2950f00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
[libx264 @ 0x2950f00] profile High, level 3.0
[h264 @ 0x29112c0] Aspect ratio mismatch between muxer (3200/3213) and encoder layer (1/1)
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
Stream mapping:
  Stream #0:0 -> #0:0 (mpeg2video (native) -> h264 (libx264))
    Last message repeated 1 times