NL Video Score

Claude cannot play video, but it CAN read image frames. This skill extracts frames at tactical timestamps, compares them against reference frames (if provided), and produces a weighted scorecard so the user can decide: ship, re-roll, or switch model.

Prerequisites

ffmpeg must be installed. Verify: ffmpeg -version

Workflow

1. Get video metadata

ffprobe -v error \
  -show_entries stream=codec_name,width,height,r_frame_rate,duration,nb_frames \
  -show_entries format=duration \
  -of default=noprint_wrappers=1 <video>