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Video processing

Skill cxcscmu/SkillLearnBench/skills/b1-one-shot-gemini-3-flash-preview/video-object-counting/video-processing

Tools and techniques for extracting keyframes and processing video files using FFmpeg.From its SKILL.md

Install
npx -y skills add cxcscmu/SkillLearnBench --skill video-processing

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SKILL.md

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Video Processing with FFmpeg

FFmpeg is a powerful tool for video manipulation. For this task, we focus on extracting keyframes.

Extraction of Keyframes

To extract keyframes from a video file, use the following command:

ffmpeg -i input_video.mp4 -vf "select='eq(pict_type,I)'" -vsync vfr output_prefix_%03d.png

Parameters:

  • -i: Input file path.
  • -vf "select='eq(pict_type,I)'": Filter to select only I-frames (keyframes).
  • -vsync vfr: Variable frame rate to ensure output frames are not duplicated.
  • output_prefix_%03d.png: Output pattern for extracted images.

Performance Tips

  • Use -q:v 2 to maintain high quality if needed.
  • Ensure the output directory exists before running the command.

What ships with it

Read from the repository

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

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