Merge pull request 'refactor: improve logging and error handling in file processing' (#4) from v1.0.2 into master

Reviewed-on: #4

app.py

@@ -552,13 +552,11 @@ class AudioEncoder:
 def process_file(encoder_type, file_path, encoder):
     """Process a single file"""
     global current_jobs
+    try:
+        logger.info(f"Starting to process {file_path} for {encoder_type}")
         if not ENCODING_ENABLED:
             logger.info(f"Encoding is disabled. Skipping {file_path}")
-        db_manager.remove_from_queue(encoder_type, file_path)
-        with job_lock:
-            current_jobs[encoder_type] = None
             return
-    try:
         if not os.path.exists(file_path):
             logger.warning(f"File {file_path} no longer exists, skipping")
             return
@@ -724,16 +722,17 @@ def process_file(encoder_type, file_path, encoder):
             if os.path.exists(temp_input):
                 os.remove(temp_input)
     except Exception as e:
-        logger.error(f"Error processing {file_path}: {e}")
+        logger.error(f"Error processing {file_path}: {e}", exc_info=True)
         try:
+            file_size = os.path.getsize(file_path) if os.path.exists(file_path) else 0
             db_manager.add_job_report(
-                encoder_type, file_path, os.path.getsize(file_path), 0,
+                encoder_type, file_path, file_size, 0,
                 os.path.splitext(file_path)[1], '', 'failed',
                 error_message=str(e),
-                target_resolution=target_resolution
+                target_resolution=target_resolution if 'target_resolution' in locals() else None
             )
-        except:
-            pass
+        except Exception as report_error:
+            logger.error(f"Failed to add job report: {report_error}", exc_info=True)
     finally:
         # Remove from queue after processing is complete
         db_manager.remove_from_queue(encoder_type, file_path)
@@ -743,23 +742,28 @@ def process_file(encoder_type, file_path, encoder):
 def worker_thread(encoder_type):
     """Worker thread for processing jobs"""
     encoder = VideoEncoder() if encoder_type == 'video' else AudioEncoder()
+    logger.info(f"Started {encoder_type} worker thread")
     
     while True:
         with job_lock:
             queue = db_manager.get_queue(encoder_type, limit=1)
             if queue and not current_jobs[encoder_type]:
                 file_path = queue[0]
+                logger.debug(f"{encoder_type} queue item: {file_path}")
                 # Check file exists before processing
                 if os.path.exists(file_path):
                     current_jobs[encoder_type] = {
                         'file_path': file_path,
                         'start_time': time.time()
                     }
+                    logger.info(f"Starting job for {file_path}")
                     # Do NOT remove from queue here anymore
                 else:
                     # Remove from queue if file does not exist
+                    logger.warning(f"File {file_path} does not exist, removing from queue")
                     db_manager.remove_from_queue(encoder_type, file_path)
         if current_jobs[encoder_type]:
+            logger.debug(f"Processing {current_jobs[encoder_type]['file_path']}")
             process_file(encoder_type, current_jobs[encoder_type]['file_path'], encoder)
         time.sleep(1)