add image display test

OpenshotService/util/parser.py

@@ -48,7 +48,7 @@ class parser:
         
         for idx in range(len(time_info)-1):
             time_info[idx]['duration'] = time_info[idx+1]['start']-time_info[idx]['start']
-        time_info[:-1]['duration'] = stopPoint
+        time_info[:-1][0]['duration'] = stopPoint
         #index start duration
         return time_info