Update app.py

app.py

@@ -281,6 +281,37 @@ def process(
 
         preview = json.load(f)
 
+
+    if not data:
+        raise Exception("No subtitle data")
+
+    preview_json = (
+        "temp/preview_only.json"
+    )
+    
+    first = data[0]
+    
+    preview_data = [
+        {
+            **first,
+            "start_time": 0,
+            "end_time": 5
+        }
+    ]
+    
+    with open(
+        preview_json,
+        "w",
+        encoding="utf-8"
+    ) as f:
+    
+        json.dump(
+            preview_data,
+            f,
+            ensure_ascii=False,
+            indent=2
+        )
+
     print(
         "TOTAL SUBTITLES:",
         len(preview)
@@ -316,8 +347,8 @@ def process(
     )
 
     generate_ass(
-        qvm_json,
-        subtitle_path,
+        preview_json,
+        preview_ass,
         arabic_font,
         arabic_y,
         translation_gap,