Graph Memory — Long Video QA Retrieval

Check the qwen-mm-plugins-video-memory tools in your tool list for full schemas and parameters.

ROUTING RULE — Read This First

When a user asks about a video that is longer than 30 minutes, you MUST use this skill instead of read_video. read_video cannot meaningfully cover a multi-hour video — it samples too few frames once, which is ineffective and always misses important content. You MUST build memory first, then you can fast explore the whole long video with the help of your pre-built memory.

Workflow:

1. Check if <video_path>.memory/ directory exists
2. Memory exists → query it using the qwen-mm-plugins-video-memory tools
3. Memory does not exist → build it first (see "Building Graph Memory" section), then query
4. After locating a specific segment via memory tools, you MUST use read_video with a narrow start_time/end_time for frame-level visual inspection, because memory is always coarse and maybe inaccurate.

Hierarchical Graph Memory

The memory is a 4-level tree. You start broad (Root/SuperEvent) and drill down to find specifics: