ffmpeg version n2.8 Copyright (c) 2000-2015 the FFmpeg developers
  built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
  configuration: --enable-libvpx
  libavutil      54. 31.100 / 54. 31.100
  libavcodec     56. 60.100 / 56. 60.100
  libavformat    56. 40.101 / 56. 40.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 40.101 /  5. 40.101
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  2.101 /  1.  2.101
Input #0, avi, from 'test.avi':
  Metadata:
    encoder         : Lavf56.40.101
  Duration: 00:00:03.10, start: 0.000000, bitrate: 25305 kb/s
    Stream #0:0: Video: huffyuv (HFYU / 0x55594648), bgr0, 700x420, 26131 kb/s, 10 fps, 10 tbr, 10 tbn, 10 tbc
[libvpx-vp9 @ 0x3522ea0] v1.4.0
Output #0, webm, to 'out.webm':
  Metadata:
    encoder         : Lavf56.40.101
    Stream #0:0: Video: vp9 (libvpx-vp9), yuv444p, 700x420, q=-1--1, 200 kb/s, 10 fps, 1k tbn, 10 tbc
    Metadata:
      encoder         : Lavc56.60.100 libvpx-vp9
Stream mapping:
  Stream #0:0 -> #0:0 (huffyuv (native) -> vp9 (libvpx-vp9))
Press [q] to stop, [?] for help
frame=   26 fps= 22 q=0.0 size=      65kB time=00:00:00.20 bitrate=2676.1kbits/frame=   31 fps= 10 q=0.0 Lsize=      94kB time=00:00:03.10 bitrate= 248.0kbits/s
video:93kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.703163%