ito@linux-ijkg:~/Desktop/3D/blender/mosquito/renders> ~/Downloads/ffmpeg-2.8.4-32bit-static/ffmpeg -i mobile_page_aug-16_sm0%3d.jpg -pix_fmt yuv420p -vb 1M mobile_page_16.webm
ffmpeg version 2.8.4-static http://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2015 the FFmpeg developers
  built with gcc 4.9.3 (Debian 4.9.3-10)
  configuration: --enable-gpl --enable-version3 --disable-shared --disable-debug --enable-runtime-cpudetect --enable-libmp3lame --enable-libx264 --enable-libx265 --enable-libwebp --enable-libspeex --enable-libvorbis --enable-libvpx --enable-libfreetype --enable-fontconfig --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-gray --enable-libopenjpeg --enable-libopus --enable-libass --enable-gnutls --enable-libvidstab --enable-libsoxr --enable-frei0r --enable-libfribidi --disable-indev=sndio --disable-outdev=sndio --cc=gcc-4.9
  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
  libpostproc    53.  3.100 / 53.  3.100
[mjpeg @ 0xa90f340] Changeing bps to 8
Input #0, image2, from 'mobile_page_aug-16_sm0%3d.jpg':
  Duration: 00:00:04.44, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 300x300 [SAR 1:1 DAR 1:1], 25 fps, 25 tbr, 25 tbn, 25 tbc
File 'mobile_page_16.webm' already exists. Overwrite ? [y/N] y
[swscaler @ 0xa9109e0] deprecated pixel format used, make sure you did set range correctly
[libvpx-vp9 @ 0xa971e40] v1.5.0-278-gc84d3ab
Output #0, webm, to 'mobile_page_16.webm':
  Metadata:
    encoder         : Lavf56.40.101
    Stream #0:0: Video: vp9 (libvpx-vp9), yuv420p, 300x300 [SAR 1:1 DAR 1:1], q=-1--1, 1000 kb/s, 25 fps, 1k tbn, 25 tbc
    Metadata:
      encoder         : Lavc56.60.100 libvpx-vp9
Stream mapping:
  Stream #0:0 -> #0:0 (mjpeg (native) -> vp9 (libvpx-vp9))
Press [q] to stop, [?] for help
frame=  111 fps=4.8 q=0.0 Lsize=     138kB time=00:00:04.44 bitrate= 255.2kbits/s
video:137kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.869516%