skillhub 是做什么的？
使用 FFmpeg 从本地视频中提取第一帧、指定时间戳或基于零的帧索引的单帧图像。
使用 FFmpeg 从本地视频中提取指定时间戳或帧索引的单帧图像。
该技能通过调用 FFmpeg 库，帮助用户从本地视频文件中精确提取单帧图像。用户可以选择提取视频的第一帧、指定时间戳（如“00:01:30”）或基于零的帧索引（如第 100 帧）。技能适用于命令行或 AI 编码代理（如 Claude Code、Cursor 等）集成的场景，无需手动编写 FFmpeg 参数。底层基于 FFmpeg 的 -ss 和 -vframes 选项实现高效定位与截取，支持常见视频格式（MP4、MOV、AVI 等）。这对于视频处理、缩略图生成、视频分析或 AI 视觉任务的数据准备非常有用。技能文档中提供清晰的参数说明与示例，开发者可直接调用。
npx skills add https://github.com/iflytek/skillhub/tree/main/builtin-skills/skills/video-frames使用 FFmpeg 从本地视频中提取第一帧、指定时间戳或基于零的帧索引的单帧图像。
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