[BUG] <title>[BUG] TTS audio generation fails with AttributeError in _extract_speech_token

是否已有关于该错误的issue或讨论？ | Is there an existing issue / discussion for this?

• 我已经搜索过已有的issues和讨论 | I have searched the existing issues / discussions

该问题是否在FAQ中有解答？ | Is there an existing answer for this in FAQ?

• 我已经搜索过FAQ | I have searched FAQ

当前行为 | Current Behavior

MiniCPM-o-4_5 TTS 功能异常报告

环境信息

• 平台: Tencent Cloud Studio (Ubuntu)
• GPU: NVIDIA A10 (24GB)
• CUDA: 12.8
• Python: 3.11.1
• torch: 2.8.0+cu128
• torchaudio: 2.8.0+cu128
• transformers: 4.51.0
• onnxruntime-gpu: 1.24.1
• minicpmo-utils: 1.0.4

问题描述

TTS 语音合成功能无法正常生成音频文件。文本生成正常，但音频文件始终不生成。

错误信息

File "cosyvoice/cli/frontend.py", line 93, in _extract_speech_token assert speech.shape[1] / 16000 <= 30, 'do not support extract speech token for audio longer than 30s' AttributeError: 'NoneType' object has no attribute 'shape'

复现步骤

1. 加载模型: init_tts=True
2. 调用 model.init_tts(streaming=False)
3. 使用 model.chat() 并设置 generate_audio=True
4. 音频文件不生成，报错如上

其他功能测试结果

• ✅ 纯文本对话 - 正常
• ✅ 图片理解 - 正常
• ✅ 语音识别 (ASR) - 正常
• ✅ 视频理解 - 正常
• ❌ 语音合成 (TTS) - 失败

附件

• diagnostic_report.json

diagnostic_report.json

期望行为 | Expected Behavior

No response

复现方法 | Steps To Reproduce

复现步骤

1. 加载模型: init_tts=True
2. 调用 model.init_tts(streaming=False)
3. 使用 model.chat() 并设置 generate_audio=True
4. 音频文件不生成，报错如上

运行环境 | Environment

- OS:
- Python:
- Transformers:
- PyTorch:
- CUDA (`python -c 'import torch; print(torch.version.cuda)'`):

备注 | Anything else?

No response

Start with cosyvoice/cli/frontend.py at line 93 and inspect diagnostic_report.json alongside the reported TTS traceback. Reproduce the sequence using init_tts=True, model.init_tts(streaming=False), and model.chat(generate_audio=True). Done means TTS generates the audio file without the AttributeError.