Files in this directory and their provenance:

test-25fps.h264:
  Using ffmpeg SVN-r0.5.9-4:0.5.9-0ubuntu0.10.04.1 @ WebKit r122718, generated
  with:
  ffmpeg -i third_party/WebKit/LayoutTests/media/content/test-25fps.mp4 \
      -vcodec copy -vbsf h264_mp4toannexb -an test-25fps.h264

test-25fps.vp8:
  ffmpeg git-2012-07-19-a8d8e86, libvpx ToT 7/19, chromium r147247,
  mkvextract v5.0.1
  ffmpeg -i test-25fps.h264 -vcodec libvpx -an test-25fps.webm && \
      mkvextract tracks test-25fps.webm 1:test-25fps.vp8 && rm test-25fps.webm
