add various fixes for bugs

bin/handler.py

@@ -119,7 +119,11 @@ class Handler:
 
         # Retrieving Video metadata
         self.filelist = os.listdir(self.tmppath)
-        self.videometa = ffmpeg.probe(str(input_path))['streams'].pop(0)
+        try:
+            self.videometa = ffmpeg.probe(str(input_path))['streams'].pop(0)
+        except Exception:
+            print( '\n\n==> Failed to execute ffprobe. Please ensure that you have a valid ffmpeg & ffprobe installation.\n    --> Refer to our wiki for a guide on a proper installation\n\n')
+            return False;
 
         self.duration = self.videometa.get( 'duration' )
         self.frames = len( self.filelist )
@@ -175,4 +179,6 @@ class Handler:
         else:
             print( 'OS CURRENTLY UNSUPPORTED!' );
             return False
-        os.system( self.command )
+        os.system( self.command )
+
+        return True;