ffmpeg error

Traceback (most recent call last):
File "/content/Retrieval-based-Voice-Conversion-WebUI/my_utils.py", line 14, in load_audio
ffmpeg.input(file, threads=0)
File "/usr/local/lib/python3.10/dist-packages/ffmpeg/_run.py", line 325, in run
raise Error('ffmpeg', out, err)
ffmpeg._run.Error: ffmpeg error (see stderr output for detail)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/content/Retrieval-based-Voice-Conversion-WebUI/infer-web.py", line 139, in vc_single
audio = load_audio(input_audio, 16000)
File "/content/Retrieval-based-Voice-Conversion-WebUI/my_utils.py", line 19, in load_audio
raise RuntimeError(f"Failed to load audio: {e}")
RuntimeError: Failed to load audio: ffmpeg error (see stderr output for detail)

Traceback (most recent call last):
File "/usr/local/lib/python3.10/dist-packages/gradio/routes.py", line 437, in run_predict
output = await app.get_blocks().process_api(
File "/usr/local/lib/python3.10/dist-packages/gradio/blocks.py", line 1349, in process_api
data = self.postprocess_data(fn_index, result["prediction"], state)
File "/usr/local/lib/python3.10/dist-packages/gradio/blocks.py", line 1283, in postprocess_data
prediction_value = block.postprocess(prediction_value)
File "/usr/local/lib/python3.10/dist-packages/gradio/components.py", line 2586, in postprocess
file_path = self.audio_to_temp_file(
File "/usr/local/lib/python3.10/dist-packages/gradio/components.py", line 360, in audio_to_temp_file
temp_dir = Path(dir) / self.hash_bytes(data.tobytes())
AttributeError: 'NoneType' object has no attribute 'tobytes'

Start in my_utils.py at load_audio and follow its call from vc_single in infer-web.py. Reproduce the failure with the reported input-audio path while capturing the ffmpeg stderr output, then determine why audio loading returns no usable result. Done means the reported audio conversion completes without the ffmpeg or NoneType errors.