使用api时发生错误

[jiujiusmd-ui]

D:\Program Files\ChatTTS>conda activate chattts

(chattts) D:\Program Files\ChatTTS>fastapi dev examples/api/main.py --host 0.0.0.0 --port 8000

FastAPI Starting development server 🚀

         Searching for package file structure from directories with __init__.py files

C:\Users\jiujiu\anaconda3\envs\chattts\Lib\site-packages\pydub\utils.py:170: RuntimeWarning: Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may not work
warn("Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may not work", RuntimeWarning)
Importing from D:\Program Files\ChatTTS\examples\api

module   🐍 main.py

  code   Importing the FastAPI app object from the module with the following code:

         from main import app

   app   Using import string: main:app

server   Server started at http://0.0.0.0:8000
server   Documentation at http://0.0.0.0:8000/docs

   tip   Running in development mode, for production use: fastapi run

         Logs:

  INFO   Will watch for changes in these directories: ['D:\\Program Files\\ChatTTS']
  INFO   Uvicorn running on http://0.0.0.0:8000 (Press CTRL+C to quit)
  INFO   Started reloader process [15340] using WatchFiles

C:\Users\jiujiu\anaconda3\envs\chattts\Lib\site-packages\pydub\utils.py:170: RuntimeWarning: Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may not work
warn("Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may not work", RuntimeWarning)
INFO Started server process [1656]
INFO Waiting for application startup.
NeMo-text-processing :: INFO :: Creating ClassifyFst grammars.
2025-11-10 10:05:11,573 WETEXT INFO found existing fst: C:\Users\jiujiu\anaconda3\envs\chattts\Lib\site-packages\tn\zh_tn_tagger.fst
2025-11-10 10:05:11,573 WETEXT INFO C:\Users\jiujiu\anaconda3\envs\chattts\Lib\site-packages\tn\zh_tn_verbalizer.fst
2025-11-10 10:05:11,573 WETEXT INFO skip building fst for zh_normalizer ...
[+0800 20251110 10:05:12] [INFO] Command | main | Initializing ChatTTS...
[+0800 20251110 10:05:12] [INFO] ChatTTS | core | download from HF: https://huggingface.co/2Noise/ChatTTS
[+0800 20251110 10:05:12] [ERRO] ChatTTS | core | Model download failed
[+0800 20251110 10:05:12] [ERRO] Command | main | Models load failed.
ERROR Traceback (most recent call last):
File "C:\Users\jiujiu\anaconda3\envs\chattts\Lib\site-packages\starlette\routing.py", line 694, in
lifespan
async with self.lifespan_context(app) as maybe_state:
File "C:\Users\jiujiu\anaconda3\envs\chattts\Lib\site-packages\starlette\routing.py", line 571, in
aenter
await self._router.startup()
File "C:\Users\jiujiu\anaconda3\envs\chattts\Lib\site-packages\starlette\routing.py", line 671, in
startup
await handler()
File "D:\Program Files\ChatTTS\examples\api\main.py", line 49, in startup_event
sys.exit(1)
SystemExit: 1
ERROR Application startup failed. Exiting.