Update app.py

app.py

@@ -29,25 +29,25 @@ async def text_to_speech(text, voice, rate, pitch):
 # Generate SRT file based on user preferences
 def generate_srt(words, audio_duration, srt_path, words_per_line, lines_per_paragraph, speech_rate):
     total_words = len(words)
-    segment_duration = audio_duration / (total_words / words_per_line)  # Average duration for each segment
-    adjusted_duration = segment_duration * (60 / (100 + speech_rate))  # Adjust duration based on speech rate
+    average_word_duration = (60 / (150 + speech_rate))  # Average duration of each word in seconds, based on typical speech rates
+    segment_duration = average_word_duration * words_per_line  # Duration for each line
     current_time = 0
 
     with open(srt_path, 'w', encoding='utf-8') as srt_file:
-        for i in range(0, total_words, words_per_line):  # Increment by words per line
+        for i in range(0, total_words, words_per_line * lines_per_paragraph):  # Increment by lines per paragraph
             segment_words = words[i:i + (words_per_line * lines_per_paragraph)]
             lines = [segment_words[j:j + words_per_line] for j in range(0, len(segment_words), words_per_line)]
             lines = [' '.join(line) for line in lines]
 
             start_time = current_time
-            end_time = min(start_time + adjusted_duration, audio_duration)  # Ensure it doesn't exceed audio duration
+            end_time = min(start_time + segment_duration * lines_per_paragraph, audio_duration)  # Ensure it doesn't exceed audio duration
             
             start_time_str = format_srt_time(start_time)
             end_time_str = format_srt_time(end_time)
-            srt_file.write(f"{i // words_per_line + 1}\n{start_time_str} --> {end_time_str}\n")
+            srt_file.write(f"{i // (words_per_line * lines_per_paragraph) + 1}\n{start_time_str} --> {end_time_str}\n")
             srt_file.write('\n'.join(lines) + '\n\n')
 
-            current_time += adjusted_duration  # Update current time for the next segment
+            current_time += segment_duration * lines_per_paragraph  # Update current time for the next segment
 
     return srt_path
 
@@ -55,7 +55,7 @@ def format_srt_time(seconds):
     millis = int((seconds - int(seconds)) * 1000)
     seconds = int(seconds)
     minutes = seconds // 60
-    hours = minutes // 60
+    hours = seconds // 3600
     minutes %= 60
     seconds %= 60
     return f"{hours:02}:{minutes:02}:{seconds:02},{millis:03}"