fix memory leak of FfmpegLoad

雾聪

2023-12-19 6823fe0c82c2f929a10510ad2533f5afcc47b354

 funasr/bin/lm_inference_launch.py

@@ -183,6 +183,7 @@
            dtype=dtype,
            batch_size=batch_size,
            key_file=key_file,
            preprocess_fn=preprocessor,
            num_workers=num_workers,
        )