video

#!/bin/bash

renice +20 -p $$ >/dev/null

unset fail 
which png2yuv >/dev/null || { echo png2yuv not installed:  try installing \"mjpegtools\"; echo sudo apt-get install mjpegtools; fail=TRUE; }
which vpxenc >/dev/null || { echo vpxenc not installed:  try installing \"vpx-tools\"; echo sudo apt-get install vpx-tools; fail=TRUE; }
if [[ ! -z "$fail" ]]; then exit 1; fi

echo creating yuv
png2yuv -I p -f 30 -j output%04d.png > video.yuv || exit 1
echo creating vpx
vpxenc --good --cpu-used=0 --auto-alt-ref=1 --lag-in-frames=16 --end-usage=vbr --passes=2 --threads=8 --target-bitrate=100000 -o video.webm video.yuv