Ffmpeg Synth

Context: $ARGUMENTS

Quick start

SMPTE HD bars + 1 kHz tone (10 s 1080p30): -f lavfi -i smptehdbars=... -f lavfi -i sine=... → Step 3, recipe A
testsrc2 moving pattern + counter: -f lavfi -i testsrc2=size=1280x720:rate=30 → Step 3, recipe B
Solid color fill: -f lavfi -i color=c=red:size=1280x720:rate=30:duration=5 → Step 3, recipe C
Gradient background: -f lavfi -i "gradients=s=1920x1080:c0=red:c1=blue:speed=0.01" → Step 3, recipe D
Mandelbrot zoom: -f lavfi -i mandelbrot=size=1920x1080:rate=30 -t 10 → Step 3, recipe E
Legacy PAL 75 % bars: -f lavfi -i pal75bars=size=720x576:rate=25 -t 10 → Step 3, recipe F
Silent stereo audio track: -f lavfi -i anullsrc=channel_layout=stereo:sample_rate=48000 -t 10 → Step 3, recipe G
White / pink / brown noise: -f lavfi -i anoisesrc=color=pink:duration=10:amplitude=0.3 → Step 3, recipe H
Sine sweep tone: -f lavfi -i "sine=frequency=440:beep_factor=4:duration=10" → Step 3, recipe I
Identity Hald CLUT PNG (for LUT authoring): -f lavfi -i haldclutsrc=level=8 -frames:v 1 hald.png → Step 3, recipe J
colorchecker 24-patch PNG: -f lavfi -i colorchecker -frames:v 1 colorchecker.png → Step 3, recipe K