extract clip start times from an ableton project file in 30fps format at 225bpm

ableton_timestamps.sh

#!/usr/bin/env bash

# .als file
FILE="$1"; shift

SCRIPT="$(cat <<RUBY
\$_.scan(%r[<CurrentStart Value="(.*?)"/><Name Value="(.*?)"/>]) do |start, name|
  frame = (start.to_f * 8).round
  seconds, frame = frame.divmod(30)
  minutes, seconds = seconds.divmod(60)
  hours, minutes = minutes.divmod(60)

  stamp = [hours, minutes, seconds, frame].map { |n| sprintf("%02d", n) }.join(':')

  puts "#{stamp} #{name}"
end
RUBY
)"

gzip -d <"$FILE" |\
  xmllint --xpath '//AudioClip/CurrentStart | //AudioClip/Name' - |\
  ruby -ne "$SCRIPT"

225 bpm means 32nd notes line up exactly with 30fps frames. 30fps * 60 seconds per minute / 8 frames per beat = 225bpm