Run2 ffmpeg keyframes
Extract I-frame keyframes from video files using FFmpeg CLI, saving as zero-padded PNG sequences starting at 001.From its SKILL.md
npx -y skills add cxcscmu/SkillLearnBench --skill run2_ffmpeg-keyframesAssembled from the repository path, not quoted from the project. Check it against their README if it does not work.
SKILL.md
1.1 KB, 274 tokens by cl100k_base, as published. Nobody here has run it
FFmpeg Keyframe Extraction
Prerequisites
- FFmpeg installed:
sudo apt install ffmpeg
Extract Keyframes (I-frames) as PNG Sequence
ffmpeg -i <input_video> -vf "select='eq(pict_type,I)'" -vsync vfr <output_dir>/keyframes_%03d.png
Example
ffmpeg -i /root/super-mario.mp4 -vf "select='eq(pict_type,I)'" -vsync vfr /root/keyframes_%03d.png
Output
- Files named:
keyframes_001.png,keyframes_002.png, ..., up to total keyframe count - Files are in RGB color (PNG format, 3-channel)
- Frame index starts at 001
- Timeline order is preserved (sorted by video timestamp)
Key Flags
-vf "select='eq(pict_type,I)'"— selects only I-frames (keyframes)-vsync vfr— avoids duplicate frame output
Notes
- The number of keyframes depends on the video's encoding (GOP size)
- PNG output is lossless and RGB by default
- To list extracted files in order:
ls /root/keyframes_*.png | sort
What ships with it
Read from the repository
Just SKILL.md. No reference files, no scripts.