ffmpeg-geq-expr — procedural expression filters

Context: $ARGUMENTS

Power-user creative filters where you hand-write a math expression and ffmpeg evaluates it per-pixel (geq), per-sample (aeval), per-pair (lut2), or per-metric (drawgraph). Grammar is the same everywhere: see references/expressions.md.

Quick start

• Custom per-pixel effect: → Step 1 → pick geq
• Custom per-sample audio effect: → Step 1 → pick aeval
• Blend/combine two videos pixel-by-pixel with math: → Step 1 → pick lut2
• Real-time metric graph burned into video: → Step 1 → pick drawgraph
• SVG overlay driven by frame metadata: → Step 1 → pick drawvg
• Light-on-dark persistence / phosphor trails: → Step 1 → pick lagfun
• Feedback-loop picture-in-picture: → Step 1 → pick feedback
• Shuffle frame order: → Step 1 → pick random

When to use