diff --git a/VideoScript.py b/VideoScript.py
index d530347..bdf28cb 100644
--- a/VideoScript.py
+++ b/VideoScript.py
@@ -965,12 +965,14 @@ def merge(self, allVideo:bool=True, allAudio:bool=False, allSubtitle:bool=False)
             if index == 0:
                 commandInputs += f'-i "{path}" '
                 commandMap += f'-map {index} '
+                # remove time codec for mp4
                 commandMap += f'-map -{index}:d '
                 commandMetadata += f'-metadata:s:v:{index} title="{name}" '
                 commandMetadata += f'-metadata:s:a:{index} title="{name}" '
                 commandMetadata += f'-metadata:s:s:{index} title="{name}" '
             else:
                 commandInputs += f'-i "{path}" '
+                # remove time codec for mp4
                 commandMap += f'-map -{index}:d '
                 if allVideo:
                     commandMap += f'-map {index}:v? '
diff --git a/VideoScriptWebUI.py b/VideoScriptWebUI.py
index d14ccbb..958de1e 100644
--- a/VideoScriptWebUI.py
+++ b/VideoScriptWebUI.py
@@ -46,7 +46,13 @@
     "select":"info",
     "unselect":"dark",
 }
-videoSortBy = ["width", "height", "w x h", "fps", "length", "bit rate"]
+videoSortBy = [
+    "name",
+    "width", "height", "w x h",
+    "r_frame_rate",
+    "duration",
+    "bitRate"
+]
 
 
 app = Dash(
@@ -857,49 +863,27 @@ def reverseVideoList(_, children):
 )
 def sortVideoList(sortBy, allColor):
 
-    global vs, allVideoList, videoItemColor
+    global vs, allVideoList, videoItemColor, videoSortBy
 
-    # add color to allVideoList
-    for index in range(len(allVideoList)):
-        allVideoList[index]["color"] = allColor[index]
+    # check dropdown validity
+    if sortBy not in videoSortBy:
+        print("Unknow sort selection")
+        raise PreventUpdate
     
-
-    if sortBy == "width":
-        allVideoList = sorted(
-            allVideoList,
-            key= lambda video: video['width'],
-        )
-    elif sortBy == "height":
-        allVideoList = sorted(
-            allVideoList,
-            key= lambda video: video['height'],
-        )
-    elif sortBy == "w x h":
+    # special sort
+    if sortBy == "w x h":
         for index in range(len(allVideoList)):
             allVideoList[index]["w x h"] = allVideoList[index]["width"] * allVideoList[index]["height"]
-        allVideoList = sorted(
-            allVideoList,
-            key= lambda video: video['w x h'],
-        )
-    elif sortBy == "fps":
-        allVideoList = sorted(
-            allVideoList,
-            key= lambda video: video['r_frame_rate'],
-        )
-    elif sortBy == "length":
-        allVideoList = sorted(
-            allVideoList,
-            key= lambda video: video['duration'],
-        )
-    elif sortBy == "bit rate":
-        allVideoList = sorted(
-            allVideoList,
-            key= lambda video: video['bitRate'],
-        )
+        allVideoList.sort(key= lambda video: video['w x h'],)
+    # normal sort
     else:
-        print("Unknow sort selection")
-        raise PreventUpdate
+        allVideoList.sort(key= lambda video: video[sortBy],)
+        
     
+    # add color to allVideoList
+    for index in range(len(allVideoList)):
+        allVideoList[index]["color"] = allColor[index]
+        
     # re generate list of video items
     videoItems = []
     vs.vList = []