转写本地文件时在“更新索引”阶段崩溃：'NoneType' object has no attribute 'get'
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Assessment
- Difficulty
- 1/5
- Estimated time
- Under an hour
- Newbie friendliness
- 78/100
Research direction
Start with src/b2t/library.py line 34 and compare its metadata handling with index_existing_workspace at line 116; pipeline.py line 87 explains the local-file metadata shape. Reproduce with uv run bili2text tx ./local-video.mp4, then verify the local transcription reaches the indexing stage without the NoneType error and records the expected display-name fallback.
Written by the indexing model from the issue text.
Description
现象
运行 uv run bili2text tx ./local-video.mp4（本地文件）时，下载/转写本身正常完成，但在最后的“更新索引”阶段报错退出：
出错了: 'NoneType' object has no attribute 'get'
任务记录中失败在 indexing 阶段（register_transcript_result）。
根因
src/b2t/library.py 第 34 行：
title=result.metadata.get("download", {}).get("title") or result.source.display_name,
pipeline.py 第 87 行构造 metadata 时，本地文件（无下载步骤）下 download 键存在但值为 None：
"download": downloaded.metadata if downloaded else None,
因此 .get("download", {}) 返回的是 None（键存在、值不为空 dict），随后在 None 上调用 .get("title") 即崩溃。转写 B 站链接（有 download 信息）时不触发，所以本地文件路径 100% 复现。
修复建议
与 index_existing_workspace 中已有的正确写法保持一致（第 116 行用的是 (data.get("download") or {})）：
title=(result.metadata.get("download") or {}).get("title") or result.source.display_name,
环境
- macOS (Apple Silicon), Python 3.12 (uv)
- bili2text 0.3.0（main 分支，2026-08 拉取）
- Dominant language
- Python
- Stars
- 1.9k
- Forks
- 243
- PR merge metrics
- No merged PRs in 30d
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