See what's running on port 80
sudo lsof -i :80
sudo kill -9 `ps ax|grep 'coreaudio[a-z]' |awk '{print $1}'`
## Mavericks
dscacheutil -flushcache
sudo killall -HUP mDNSResponder
## Lion or Mountain Lion
sudo killall -HUP mDNSResponder
## Mac OS X v10.6
sudo dscacheutil -flushcache
Get pngpaste, then…
pngpaste - | base64 | awk '{print "<img src=\"data:image/png;base64,"$1"\">"}' | pbcopy
ffmpeg -i my-movie.mov -s 800x600 -pix_fmt rgb24 -r 10 -f gif - | gifsicle --optimize=3 --delay=10 > my-movie.gif