ffmpeg -loop_input -shortest -r 5 -i /Users/director/dev/sc2s3/screenshot20100520181947485154.png -i /Users/director/dev/sc2s3/screenshot20100521200412106883.png -i /Users/director/dev/sc2s3/output.wav -qscale 3 -g 100 -acodec libfaac -ab 128k /Users/director/dev/sc2s3/narrated-screenshot20100520181947485154.flv