cxcscmu
cxcscmu/SkillLearnBench
用 Codex 或 Claude 帮你安装 复制这段 Prompt，粘贴到 Codex、Claude 或其他助手里，让它检查 Skill 页面并帮你完成安装。
直接命令不会经过审查 Prompt；运行前请先检查来源。
npx skills add https://github.com/cxcscmu/SkillLearnBench --skill run2-ffmpeg-extract命令会保持在同一行。复制前请横向滚动并检查完整内容。
想先保存到本地？可下载 SkillsMP 当前能够提供的文件。
正在显示 SKILL.md
基于 SOC 职业分类
| name | run2_ffmpeg-extract |
| description | Extract key frames (I-frames) from a video file into a sequence of images using FFmpeg. |
Extract key frames (I-frames) from video files using FFmpeg CLI. This is particularly useful for video analysis tasks where you only need representative frames rather than every single frame.
This method is highly recommended for performance as it skips decoding non-keyframes entirely.
ffmpeg -skip_frame nokey -i <input_video> -vsync vfr <output_pattern>
Options Explained:
-skip_frame nokey: Tells the decoder to skip non-keyframes.-i <input_video>: The source video file.-vsync vfr: Variable frame rate synchronization, prevents duplicate frames in the output. Note: in newer ffmpeg versions, -fps_mode vfr is preferred.<output_pattern>: The filename pattern for the output, such as keyframes_%03d.png which produces keyframes_001.png, keyframes_002.png, etc.ffmpeg -skip_frame nokey -i video.mp4 -fps_mode vfr keyframes_%03d.png