Fix aspect ratio problems

README.md

@@ -28,7 +28,6 @@ Or install it yourself as:
 ## Usage
 
 ### Use in Command Line
-
 See usage with: `videosprites help process`
 
 Try it out with the defaults on one of the test videos in this repository under test/videos:
@@ -42,7 +41,6 @@ Or create sprites that better match your use case:
 You can also make an animated GIF from all the selected frames using the same size as the thumbnails by adding the `--gif` option.
 
 ### Use as Gem
-
 To use the project as a module in your own video processing workflow you can use it like this:
 
 ```ruby

lib/video_sprites/processor.rb

@@ -72,7 +72,7 @@ def create_gif
     end
 
     def ffmpeg_cmd
-      %Q|ffmpeg -i "#{@input_file}" -vf fps=1/#{@options[:seconds]} #{thumbnail_image_path} |
+      %Q|ffmpeg -i "#{@input_file}" -vf "fps=1/#{@options[:seconds]},scale=640x360,pad=640:480:0:60:black" #{thumbnail_image_path} |
     end
 
     def montage_cmd(sprite_slice, index)

video_sprites.gemspec

@@ -23,7 +23,7 @@ Gem::Specification.new do |spec|
 
   spec.add_dependency "thor"
 
-  spec.add_development_dependency "bundler", "~> 1.13"
+  spec.add_development_dependency "bundler", "~> 2.0"
   spec.add_development_dependency "rake", "~> 10.0"
   spec.add_development_dependency "minitest", "~> 5.0"
   spec.add_development_dependency "colorize"