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Run2 extract video keyframes

Skill cxcscmu/SkillLearnBench/skills/b3-teacher-feedback-claude-sonnet-4-6/video-object-counting/run2_extract-video-keyframes

[COLM'26] SkillLearnBench is the first benchmark for evaluating continual learning methods that automatically generate agent skills.

Install
npx -y skills add cxcscmu/SkillLearnBench --skill run2_extract-video-keyframes

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What its author says it does

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Extract key frames from an MP4 video file and save them as PNG images in a target directory. Use this skill when you need to convert a video into individual frame images for further analysis.

SKILL.md

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Extract Video Keyframes

Use ffmpeg to extract key frames from the video and save them as sequentially numbered PNG files.

ffmpeg -i /root/super-mario.mp4 -vf "select=eq(pict_type\,I)" -vsync vfr /root/keyframes_%03d.png

This extracts only I-frames (keyframes) from the video and saves them as /root/keyframes_001.png, /root/keyframes_002.png, etc., in timeline order.

After extraction, verify the files exist:

ls /root/keyframes_*.png | sort

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