Optimize audio extraction using FFmpeg directly for faster processing

video_processor.py

@@ -325,24 +325,62 @@ def extract_audio_from_video(video_path: str, output_format: str = "mp3"):
         Path to the extracted audio file
     """
     try:
-        from moviepy import VideoFileClip
-        
         # Generate output filename
         base_name = os.path.splitext(os.path.basename(video_path))[0]
         audio_filename = f"{base_name}_audio.{output_format}"
         output_path = os.path.join(os.path.dirname(video_path), audio_filename)
         
-        # Extract audio
-        with VideoFileClip(video_path) as video:
-            if video.audio is None:
-                raise ValueError("Video has no audio track")
+        # Try FFmpeg first (fastest method)
+        try:
+            import subprocess
             
-            video.audio.write_audiofile(
-                output_path,
-                logger=None
-            )
-        
-        return output_path
+            # Determine codec based on output format
+            if output_format.lower() == 'mp3':
+                codec = 'libmp3lame'
+            elif output_format.lower() == 'wav':
+                codec = 'pcm_s16le'
+            elif output_format.lower() in ['m4a', 'aac']:
+                codec = 'aac'
+            else:
+                codec = 'copy'  # Try to copy without re-encoding
+            
+            # FFmpeg command to extract audio stream only (much faster)
+            cmd = [
+                'ffmpeg', '-i', video_path,
+                '-vn',  # no video processing
+                '-acodec', codec,
+                '-y',  # overwrite output
+                '-loglevel', 'error',  # suppress output
+                output_path
+            ]
+            
+            result = subprocess.run(cmd, capture_output=True, text=True)
+            
+            if result.returncode == 0 and os.path.exists(output_path):
+                print(f"✓ Audio extracted using FFmpeg (fast method)")
+                return output_path
+            else:
+                print(f"FFmpeg failed: {result.stderr}")
+                raise Exception("FFmpeg extraction failed")
+                
+        except Exception as ffmpeg_error:
+            print(f"FFmpeg not available or failed: {ffmpeg_error}")
+            print("Falling back to MoviePy method...")
+            
+            # Fallback to MoviePy method
+            from moviepy import VideoFileClip
+            
+            with VideoFileClip(video_path) as video:
+                if video.audio is None:
+                    raise ValueError("Video has no audio track")
+                
+                video.audio.write_audiofile(
+                    output_path,
+                    logger=None
+                )
+            
+            print(f"✓ Audio extracted using MoviePy (fallback method)")
+            return output_path
         
     except Exception as e:
         print(f"Error extracting audio: {str(e)}")