RMagick无法打开图像

Question

今天我试着写一个从文件夹中生成动画gif的代码，但是我得到了这个错误：

.../.gem/ruby/2.0.0/gems/rmagick-2.13.2/lib/RMagick.rb:1635:in `read': unable to open image `0.jpg,3.jpg,1.jpg,2.jpg': No such file or directory @ error/blob.c/OpenBlob/2641 (Magick::ImageMagickError)
from .../.gem/ruby/2.0.0/gems/rmagick-2.13.2/lib/RMagick.rb:1635:in `block in initialize'
.../.gem/ruby/2.0.0/gems/rmagick-2.13.2/lib/RMagick.rb:1634:in `each'
.../.gem/ruby/2.0.0/gems/rmagick-2.13.2/lib/RMagick.rb:1634:in `initialize'
from .../bin/scripts/animate.rb:20:in `new'
from .../bin/scripts/animate.rb:20:in `<main>'

代码如下：

#!/usr/bin/env ruby

require 'RMagick'
include Magick

files = Dir.glob"*.jpg"

if (!ARGV[0])
 puts "Usage:"
 puts "animate.rb 10"
 puts "-0 delay ex. 10"
else
  f = files.join(',').to_s
  animation = ImageList.new("#{f}")
  animation.delay = ARGV[0].to_i
  animation.write("animated.gif")
 exit
end

非常感谢;)

Answer 1

ImageList.new希望文件名作为参数，一次一个。您仅提供了一个参数，即连接文件名的字符串。因此，不是

f = files.join(',').to_s
animation = ImageList.new("#{f}")

使用

animation = ImageList.new *files

*files指示ruby将数组成员展开为单独的参数