ffmpeg 3

Give text-only DeepSeek Harness agents video understanding: scene-aware frame sampling + VLM + optional ASR transcript fused into timeline evidence. / 给纯文本模型的视频理解插件（场景感知抽帧 + VLM + 可选语音转录）

DSH 视频处理工具插件：ffmpeg_probe/cut/concat/encode/subtitle/extract/gif 七工具，进程走官方 subprocess 服务，超时树级终止、环境变量路径回退与多视频流探测，零运行时依赖（ffmpeg 本体除外）。

DeepSeek Harness (dsh) plugin: turn one idea into a narrated video cut from your own asset folder, stopping four times to ask you first.