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#!/bin/bash
OUT="$1"
[ -n "$OUT" ] || OUT="vsync.avi"
TMP=".build.tmp"
rm -rf ${TMP}
mkdir ${TMP}
convert -size 640x480 -depth 24 canvas:black png24:${TMP}/black.png
convert -size 640x480 -depth 24 canvas:white png24:${TMP}/white.png
mkdir ${TMP}/anim
for ((a=0; $a < 1000; a=$a+2)); do
ln -s ../black.png ${TMP}/anim/$a.png
done
for ((a=1; $a < 1000; a=$a+2)); do
ln -s ../white.png ${TMP}/anim/$a.png
done
mencoder "mf://${TMP}/anim/*.png" -v -vf-clr -mf fps=60 -o "${OUT}" -ovc lavc
exitcode=$?
rm -rf ${TMP}
exit ${exitcode}
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