subtitle setup fix

video_tool.py

@@ -18,9 +18,17 @@ def add_subtitle_to_video(input_file, subtitle_file, output_file, start_time, en
     print(f"INPUT: {input_file}")
     print(f"SUBTITLE: {subtitle_file}")
     print(f"OUTPUT: {output_file}")
+    # 1: Add subtitle
     (
         ffmpeg
         .input(input_file)
-        .output(output_file, ss=start_time, to=end_time, vf='subtitles=' + subtitle_file, preset='ultrafast', acodec='copy')
+        .output(output_file, vf='subtitles=' + subtitle_file, acodec='copy')
+        .run(overwrite_output=True)
+    )
+    # 2: Cut the video
+    (
+        ffmpeg
+        .input(output_file)
+        .output(output_file, ss=start_time, to=end_time, acodec='copy')
         .run(overwrite_output=True)
     )