Update app.py

app.py

@@ -6,6 +6,8 @@ import subprocess
 import cv2
 import tempfile
 
+
+
 from fonts import setup_fonts
 from converter import convert_qurancaption_to_qvm
 from subtitle import generate_ass
@@ -142,6 +144,32 @@ def preview_layout(
         qvm_json
     )
 
+
+
+
+    with open(
+        qvm_json,
+        "r",
+        encoding="utf-8"
+    ) as f:
+    
+        data = json.load(f)
+    
+    data[0]["start_time"] = 0
+    data[0]["end_time"] = 999
+    
+    with open(
+        qvm_json,
+        "w",
+        encoding="utf-8"
+    ) as f:
+    
+        json.dump(
+            data,
+            f,
+            ensure_ascii=False,
+            indent=2
+        )
     # =====================================
     # ASS
     # =====================================
@@ -192,16 +220,22 @@ def preview_layout(
         [
             "ffmpeg",
             "-y",
-
+    
             "-loop", "1",
             "-i", background_image,
-
+    
             "-vf",
             f"ass={preview_ass}:fontsdir=fonts",
-
+    
+            "-ss",
+            "1",
+    
             "-frames:v",
             "1",
-
+    
+            "-update",
+            "1",
+    
             preview_output
         ],
         check=True