Untitled

ffmpeg version 3.2.5-1~bpo8+1 Copyright (c) 2000-2017 the FFmpeg developers
  built with gcc 4.9.2 (Debian 4.9.2-10)
  configuration: --prefix=/usr --extra-version='1~bpo8+1' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --disable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 34.101 / 55. 34.101
  libavcodec     57. 64.101 / 57. 64.101
  libavformat    57. 56.101 / 57. 56.101
  libavdevice    57.  1.100 / 57.  1.100
  libavfilter     6. 65.100 /  6. 65.100
  libavresample   3.  1.  0 /  3.  1.  0
  libswscale      4.  2.100 /  4.  2.100
  libswresample   2.  3.100 /  2.  3.100
  libpostproc    54.  1.100 / 54.  1.100
Input #0, matroska,webm, from 'pipe:':
  Metadata:
    encoder         : Chrome
  Duration: N/A, start: 0.000000, bitrate: N/A
    Stream #0:0(eng): Audio: opus, 48000 Hz, mono, fltp (default)
    Stream #0:1(eng): Video: vp8, yuv420p, 640x480, SAR 1:1 DAR 4:3, 1k tbr, 1k tbn, 1k tbc (default)
    Metadata:
      alpha_mode      : 1
[libvpx-vp9 @ 0x558e525679e0] v1.3.0
Output #0, webm, to 'new.webm':
  Metadata:
    encoder         : Lavf57.56.101
    Stream #0:0(eng): Video: vp9 (libvpx-vp9), yuv420p, 640x480 [SAR 1:1 DAR 4:3], q=-1--1, 200 kb/s, 1k fps, 1k tbn, 1k tbc (default)
    Metadata:
      alpha_mode      : 1
      encoder         : Lavc57.64.101 libvpx-vp9
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Stream mapping:
  Stream #0:1 -> #0:0 (vp8 (native) -> vp9 (libvpx-vp9))
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0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.5 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.5 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.5 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.4 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.4 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.4 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.4 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.3 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.3 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.3 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.3 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.3 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.3 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.3 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.3 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.3 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   22 fps=0.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droPast duration 0.999992 too large