bin/datamosh in aviglitch-0.1.1 vs bin/datamosh in aviglitch-0.1.2

@@ -24,24 +24,27 @@
     puts opts
     exit
   end
 end
 
-input = opts.parse!
+input = Dir.glob opts.parse!
 if input.empty?
   puts opts
   exit 1
 end
 
 a = AviGlitch.open input.shift
 a.glitch_with_index :keyframe do |frame, i|
-  (!all && i == 0) ? frame : nil # keep the first frame
+  (!all && i == 0) ? frame : "" # keep the first frame
 end
+a.clear_keyframes!(!all ? 1..a.frames.size : nil)
+
 input.each do |file|
   b = AviGlitch.open file
   b.glitch :keyframe do |frame|
-    nil
+    ""
   end
+  b.clear_keyframes!
   a.frames.concat b.frames
 end
 
 a.output output