#!/bin/bash

# get the first 750K of all the Ogg Theora files
# puf -r -lb 750000 http://mirror.linux.org.au/linux.conf.au/2007/video/

# go through directories and extract keyframes using mplayer
for directory in *; do

 # go through files
 for file in $directory/*.ogg; do

   imagename=`basename $file .ogg`
   imagename=$imagename.jpg

   echo "mplayer -ss 120 -frames 1 -vo jpeg $file"
   mplayer -ss 120 -frames 1 -vo jpeg $file

   echo "mv 00000001.jpg $directory/$imagename"
   mv 00000001.jpg $directory/$imagename

 done

done