changed to python312

backend/utils/audio_processing.py

@@ -15,8 +15,13 @@ _temp_audio_files = []
 
 def extract_audio(video_path: Path):
     """Extract audio from a video file into a temp directory for automatic cleanup."""
+    logger.info(f"[extract_audio] Extracting audio from: {video_path}")
     try:
         audio = AudioFileClip(str(video_path))
+        if audio.duration is None or audio.duration == 0:
+            logger.error(f"[extract_audio] File has no audio track or zero duration: {video_path}")
+            raise RuntimeError(f"File has no audio track: {video_path}")
+        logger.info(f"[extract_audio] Duration: {audio.duration:.2f}s, fps: {audio.fps}")
         temp_dir = tempfile.mkdtemp(prefix="videotranscriber_")
         audio_path = Path(temp_dir) / f"{video_path.stem}_audio.wav"
         try:
@@ -25,9 +30,16 @@ def extract_audio(video_path: Path):
             # moviepy 1.x uses verbose parameter; moviepy 2.x removed it
             audio.write_audiofile(str(audio_path), verbose=False, logger=None)
         audio.close()
+        if not audio_path.exists() or audio_path.stat().st_size == 0:
+            logger.error(f"[extract_audio] Output WAV is empty or missing: {audio_path}")
+            raise RuntimeError(f"Audio extraction produced empty file: {audio_path}")
+        logger.info(f"[extract_audio] Extracted to: {audio_path} ({audio_path.stat().st_size} bytes)")
         _temp_audio_files.append(str(audio_path))
         return audio_path
+    except RuntimeError:
+        raise
     except Exception as e:
+        logger.error(f"[extract_audio] Failed for '{video_path}': {e}", exc_info=True)
         raise RuntimeError(f"Audio extraction failed: {e}")
 
 
@@ -54,6 +66,9 @@ def get_video_duration(video_path: Path):
         clip = AudioFileClip(str(video_path))
         duration = clip.duration
         clip.close()
+        if duration is None or duration == 0:
+            logger.warning(f"[get_video_duration] Zero or null duration for: {video_path}")
         return duration
-    except Exception:
+    except Exception as e:
+        logger.error(f"[get_video_duration] Failed for '{video_path}': {e}", exc_info=True)
         return None