I checked your site, this video is working.

http://screenfreaks.com/motion/view/9/loca/

From your debug log

Code:
/usr/local/bin/ffmpeg -i /home/screenfr/public_html/motion/video/9.avi -acodec mp3 -ar 22050 -ab 32 -f flv /home/screenfr/public_html/motion/flvideo/9.flv
That is an AVI upload.