[Gravitator]

Shows different bitrates

ffmpeg_xvc_enc.exe -i z:/1.y4m -pix_fmt yuv422p -c:v libxvc -speed-mode 3 -qp 30 z:/test.mp4
ffmpeg version N-85113-g298f56e Copyright (c) 2000-2017 the FFmpeg developers
  built with gcc 5.3.1 (GCC) 20160211
  configuration: --enable-gpl --enable-nonfree --enable-ffplay --enable-libxvc --extra-ldexeflags=-static --pkg-config-flags=--static --arch=x86_64 --target-os=mingw32 --cross-prefix=x86_64-w64-mingw32-
  libavutil      55. 59.100 / 55. 59.100
  libavcodec     57. 90.100 / 57. 90.100
  libavformat    57. 72.100 / 57. 72.100
  libavdevice    57.  7.100 / 57.  7.100
  libavfilter     6. 83.100 /  6. 83.100
  libswscale      4.  7.100 /  4.  7.100
  libswresample   2.  8.100 /  2.  8.100
  libpostproc    54.  6.100 / 54.  6.100
Input #0, yuv4mpegpipe, from 'z:/1.y4m':
  Duration: 00:00:05.20, start: 0.000000, bitrate: 276481 kb/s
    Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p(progressive), 1280x720, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 25 tbn, 25 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo (native) -> xvc (libxvc))
Press [q] to stop, [?] for help
[libxvc @ 00000138a6d74480] Using -1 encoder threads
Output #0, mp4, to 'z:/test.mp4':
  Metadata:
    encoder         : Lavf57.72.100
    Stream #0:0: Video: xvc (libxvc) ([37][0][0][0] / 0x0025), yuv422p, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 25 fps, 12800 tbn, 25 tbc
    Metadata:
      encoder         : Lavc57.90.100 libxvc
frame=  130 fps=1.0 q=-0.0 Lsize=     496kB time=00:00:04.52 bitrate= 898.2kbits/s speed=0.0349x
video:493kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.470185%

C:\>ffmpeg_xvc_enc.exe -i z:/test.mp4
ffmpeg version N-85113-g298f56e Copyright (c) 2000-2017 the FFmpeg developers
  built with gcc 5.3.1 (GCC) 20160211
  configuration: --enable-gpl --enable-nonfree --enable-ffplay --enable-libxvc --extra-ldexeflags=-static --pkg-config-flags=--static --arch=x86_64 --target-os=mingw32 --cross-prefix=x86_64-w64-mingw32-
  libavutil      55. 59.100 / 55. 59.100
  libavcodec     57. 90.100 / 57. 90.100
  libavformat    57. 72.100 / 57. 72.100
  libavdevice    57.  7.100 / 57.  7.100
  libavfilter     6. 83.100 /  6. 83.100
  libswscale      4.  7.100 /  4.  7.100
  libswresample   2.  8.100 /  2.  8.100
  libpostproc    54.  6.100 / 54.  6.100
[libxvc @ 000002412dad4280] Using 0 decoder threads
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'z:/test.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2mp41
    encoder         : Lavf57.72.100
  Duration: 00:00:05.20, start: 0.000000,  bitrate: 780 kb/s
    Stream #0:0(und): Video: xvc (xvc1 / 0x31637678), yuv422p10le(progressive), 1280x720, 777 kb/s, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 12800 tbn, 12800 tbc (default)
    Metadata:
      handler_name    : VideoHandler
At least one output file must be specified