Run gTTS in thread to avoid asyncio loop errors

app.py

@@ -28,7 +28,8 @@ async def generate_video(topic, progress=gr.Progress()):
         
         
         progress(0.3, desc="Generating audio...")
-        await generate_audio(response, SAMPLE_FILE_NAME)
+        # Run blocking gTTS generation in a thread to keep event loop healthy
+        await asyncio.to_thread(generate_audio, response, SAMPLE_FILE_NAME)
         
         progress(0.5, desc="Generating captions...")
         timed_captions = generate_timed_captions(SAMPLE_FILE_NAME)

utility/audio_generator.py

@@ -1,10 +1,9 @@
 import os
 import logging
-import asyncio
 
 logger = logging.getLogger(__name__)
 
-async def generate_audio(text, outputFilename):
+def generate_audio(text, outputFilename):
     """Generate audio from text using Google gTTS (reliable fallback)
     
     Args:
@@ -22,19 +21,18 @@ async def generate_audio(text, outputFilename):
         
         try:
             from gtts import gTTS
-            
+
             # Generate speech with gTTS
-            # Slow=False for normal speed, slow=True for slower (more natural) speech
             tts = gTTS(text=text, lang='en', slow=True, tld='com')
-            
+
             # Save to file
             tts.save(outputFilename)
-            
+
             if not os.path.exists(outputFilename):
                 raise Exception(f"Failed to create audio file at {outputFilename}")
-            
+
             logger.info(f"Successfully generated audio at {outputFilename}")
-            
+
         except ImportError:
             logger.warning("gTTS not found")
             raise Exception("gTTS not found. Install with: pip install gtts")