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Run3 extract keyframes from video

Skill cxcscmu/SkillLearnBench/skills/b3-teacher-feedback-gemini-3-flash-preview/video-object-counting/run3_extract_keyframes_from_video

Converts a video file into a series of keyframe images using FFmpeg with specific frame selection filters.From its SKILL.md

Install
npx -y skills add cxcscmu/SkillLearnBench --skill run3_extract_keyframes_from_video

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

SKILL.md

0.8 KB, 168 tokens by cl100k_base, as published. Nobody here has run it

To extract high-quality keyframes from the video, use FFmpeg with the I-frame selection filter. This ensures only the primary frames are captured for analysis.

Command:

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

Parameters:

  • -vf "select='eq(pict_type\,I)'": Filters the video to select only Intra-coded frames (keyframes).
  • -vsync vfr: Ensures variable frame rate is handled correctly so no frames are duplicated or dropped.
  • /root/keyframes_%03d.png: The output pattern to save frames in chronological order (e.g., keyframes_001.png, keyframes_002.png).

What ships with it

Read from the repository

Just SKILL.md. No reference files, no scripts.

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