A simple example of creating mpeg from image using ffmpeg.( and creating gif animation using ImageMagick )

# Create source images by ImageMagick.
convert -size 100x100 xc:   +noise Random   random01.png
convert random01.png -virtual-pixel tile  -blur 0x1  -auto-level random02.png
convert random01.png -virtual-pixel tile  -blur 0x3  -auto-level random03.png
convert random01.png -virtual-pixel tile  -blur 0x5  -auto-level random04.png
convert random01.png -virtual-pixel tile  -blur 0x10 -auto-level random05.png
convert random01.png -virtual-pixel tile  -blur 0x20 -auto-level random06.png
# to mpeg.
ffmpeg -i random%02d.png out.mpg
# to gif animation.
convert -delay 10 -loop 0 random*.png random_animation.gif

# ref. ffmpeg静止画→動画作成苦戦しまくりAdd Star
http://d.hatena.ne.jp/reuni/20080131/1201771541
http://www.imagemagick.org/Usage/