Update for Ubuntu 16.04 and FFmpeg 2.8.8#31

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artifactz wants to merge 3 commits intoRobotWebTools:developfrom

artifactz:ffmpeg2.8.8-develop

Commits on Dec 1, 2016

replaced sprintf with snprintf
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implemented a proper IO context, added nicer frame buffers, added H.264 and VP9 streamer, moved codec options into codec classes, added container format options, bugfixes
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support old FFmpeg 1.0
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committed