Bash10 Apr 2005 09:04 am
I’m working on a script randomly grab mp3s from a playlist and fill a CD with shuffled songs.
I’ll be using bash’s built-in random number generator which I believe is available in all versions.
Here’s the shuffle function for those interested:
# Usage: shuffle <filename>
function shuffle () {
cat "${@}"|grep -v "^#" |
while read mp3 ; do
echo "$RANDOM $mp3"
done | sort | cut -d" " -f2-
}
Requirements will be mpg321 and cdrecord.
March 3rd, 2007 at 7:24 pm
Great idea for the shuffle! The “sort” might or should be “sort -n”, at least for consistency. BTW, I compared your shuffle() with a simple perl script using mainly “splice(@array, rand @array, 1)”. The perl shuffles 40k lines in 0.5 seconds whereas your shuffle() takes 8.2 seconds on a 2.4 GHz Xeon. Of course, the difference is of less importance when the number of lines is lower.