From: 12 34 <rubyforum@...>
Date: 2007-07-04T06:35:51+09:00
Subject: RubyOSA for QuickTime

How do I access the properties of a QuickTime movie? I'm trying RubyOSA,
but am open to other ideas.

I ultimately want to save the middle frame of movies I download from my
digital camera. That jpg will be a placeholder in Aperture. Here's what
I think are the essentials at this point

require 'rbosa'
require 'fileutils'
include FileUtils
appQT = OSA.app('QuickTime Player')
src  = "/Volumes/photos/"

filesCount = 0
frameFilesCount = 0
Find.find(src) do |fn|
  if File.file?(fn)
       if ['.mov','.avi'].include?(File.extname(fn).downcase)
             appQT.open(fn) # works
             frameCount = appQT.duration("movie 1") >> undefined method
‘duration’ for #<OSA::QuickTimePlayer::Application:0x1065c24>
       puts "frameCount: #{frameCount}"
            appQT.close(fn) # doesn't work
          end
      end
    end
puts

I looked at the output of appQT.methods and none of the items listed
that made sense to me worked.

This newbie needs some help groking RubyOSA, Ruby, and QuickTime.

Thanks

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