Adding check for valid output path

video2x/video2x.py

@@ -587,6 +587,11 @@ def main() -> int:
             logger.critical("Input path is not a file")
             return 1
             
+        # Output file won't exist yet, but the parent directory should.
+        if not args.output.parent.exists():
+            logger.critical(f"Output directory does not exist: {args.output}")
+            return 1
+
         # set logger level
         if os.environ.get("LOGURU_LEVEL") is None:
             os.environ["LOGURU_LEVEL"] = args.loglevel.upper()