rqtrotate

Pure ruby library to detect and affect rotation of ISO Base Media Format files such as Apple QuickTime and 3gp.

Credits

The logical core of this library is a port of Daniel G. Taylor’s qtrotate python library(github.com/danielgtaylor/qtrotate). Many, MANY thanks to him!

Usage

Ruby

require 'rubygems'
require 'rqtrotate'

include RQTRotate

# block style
Movie.open(:file_name => ARGV[0]) do |movie|
  degrees = movie.rotation  
  puts "rotation is #{degrees}"

  movie.rotation = degrees + 90
end

# stream style
File.open(ARGV[0], File::RDWR) do |f|
  movie = Movie.new(f)

  degrees = movie.rotation  
  puts "rotation is #{degrees}"

  f.seek(0, IO::SEEK_SET)
  movie.rotation = degrees + 90
end

Command Line

# see if a file is rotated
$ qtrotate_get ./test.mov
90

# rotate to 0 degrees
$ qtrotate_set ./test.mov 0

Copyright

Copyright 2011 The Skunkworx.