Fixed empty line bug with rotation matrix

Author: Johan Kanefur

lib/ffprobe.js

@@ -9,6 +9,11 @@ function legacyDisposition(key) { return key.match(/^DISPOSITION:/); }
 
 function parseFfprobeOutput(out) {
   var lines = out.split(/\r\n|\r|\n/);
+
+  lines = lines.filter(function (line) {
+    return line.length > 0;
+  });
+
   var data = {
     streams: [],
     format: {},