avcmd="avconv -y -i $file -map 0 -map -0:s -vcodec libx264 -acodec libfaac $dirname/$basename.mp4"
echo "$avcmd"
success=1; $avcmd && success=0
if [ $success -eq 0 ]; then
  echo "Hurray!"
  echo $filename >> converted.txt
else
  echo "Oh, crap!"
  echo $filename >> failed.txt
fi