High quality video from images by FFMPEG

Gary Steele described how to use ffmpeg to make a video from images by the command:
ffmpeg -r 10 -b 1800 -i %03d.jpg test1800.mp4
(see: http://electron.mit.edu/~gsteele/ffmpeg/)

This command only can output a very low quality video. To make the video better, you can try following command:
ffmpeg -f image2 -i %03d.jpg -r 10 -s w*h test1800.mp4
where w and h are the width and hight of the video image, such as 640*480.

How to use ffmpeg extract freams from video file

ffmpeg is a power tool.
Here is a method.

ffmpeg -i input.avi -r 10 -f image2 images%05d.png

Here input.avi is input video file.
10 is fps.
image2 is image format.
%05d means that it has five numbers behind images. eg.images99999.png