Update app.py

app.py

@@ -322,6 +322,7 @@ def generate_subtitles(audio_file_path, prompt, language, auto_detect_language,
                                 chunk_path,
                                 "-vf",
                                 f"subtitles={temp_srt_path}:fontsdir={font_dir}:force_style='Fontname={font_name},Fontsize={int(font_size)},PrimaryColour=&H{font_color[1:]}&,OutlineColour=&H{outline_color[1:]}&,BorderStyle={int(outline_thickness)},Outline=1'",
+                                "-preset", "fast",
                                 output_file_path,
                             ],
                             check=True,
@@ -402,6 +403,7 @@ def generate_subtitles(audio_file_path, prompt, language, auto_detect_language,
                             audio_file_path,
                             "-vf",
                             f"subtitles={temp_srt_path}:fontsdir={font_dir}:force_style='FontName={font_name},Fontsize={int(font_size)},PrimaryColour=&H{font_color[1:]}&,OutlineColour=&H{outline_color[1:]}&,BorderStyle={int(outline_thickness)},Outline=1'",
+                            "-preset", "fast",
                             output_file_path,
                         ],
                         check=True,