How to add a sticker text with Claude

Add sticker text to input.mp4: the words "SO GLOWY" in a heavy font (Arial Black) 12% of the frame width tall, hot pink (255, 64, 160), with a solid white (255, 255, 255) outline 15% of the letter size thick around every letter so it looks die-cut, and a drop shadow under the white outline offset 6 pixels right and 8 down, blurred slightly, black at 60% opacity. Tilt the whole sticker 7 degrees counterclockwise and center it 50% across and 15% down. At 0.5 seconds it appears at 135% size and shrinks to 100% over 0.2 seconds, easing out, as if slapped onto the screen, then stays to the end. Use Python with Pillow to draw it and ffmpeg to put it on the video (don't rely on ffmpeg's drawtext filter), keep the audio, and save it as output.mp4.

#!/usr/bin/env python3
"""Sticker text: pink words with a thick white die-cut border and a soft shadow slap onto the frame, tilted.

Usage: python3 sticker-text.py input.mp4 output.mp4
Needs ffmpeg and Pillow (pip install pillow).
"""
import json
import math
import subprocess
import sys
from pathlib import Path

from PIL import Image, ImageDraw, ImageFilter, ImageFont

TEXT = "SO GLOWY"
START = 0.5              # second the sticker lands
SLAP = 0.2               # seconds it takes to shrink from 135% onto the frame
SIZE = 0.12              # letter size as a share of the frame width
X, Y = 0.5, 0.15         # sticker center (0-1 across and down the frame)
COLOR = (255, 64, 160)   # letter color
BORDER = 0.15            # white border thickness as a share of the letter size
TILT = 7                 # degrees, counterclockwise
SHADOW = (6, 8, 0.6)     # shadow offset right, offset down (pixels) and opacity
FONTS = ["/System/Library/Fonts/Supplemental/Arial Black.ttf",    # macOS
         "/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf",  # Linux
         "C:/Windows/Fonts/ariblk.ttf"]                           # Windows
FONT_FILE = next((f for f in FONTS if Path(f).exists()), None) or sys.exit("No bold font found: add one to FONTS")


def sticker():
    """The words with their white border and shadow, drawn once at full size and tilted."""
    font = ImageFont.truetype(FONT_FILE, round(w * SIZE))
    border = round(font.size * BORDER)
    dx, dy, opacity = SHADOW
    left, top, right, bottom = font.getbbox(TEXT, stroke_width=border)
    pad = border * 2 + max(dx, dy)
    size = (right - left + 2 * pad, bottom - top + 2 * pad)
    at = (pad - left, pad - top)

    cut = Image.new("L", size)  # the die-cut outline: letters grown by the border
    ImageDraw.Draw(cut).text(at, TEXT, font=font, fill=255, stroke_width=border, stroke_fill=255)
    shadow = cut.transform(size, Image.AFFINE, (1, 0, -dx, 0, 1, -dy)).filter(ImageFilter.GaussianBlur(border / 2))

    img = Image.new("RGBA", size, (0, 0, 0, 0))
    img.putalpha(shadow.point(lambda a: round(a * opacity)))
    img.paste((255, 255, 255, 255), mask=cut)
    ImageDraw.Draw(img).text(at, TEXT, font=font, fill=COLOR)
    return img.rotate(TILT, resample=Image.BICUBIC, expand=True)


def overlay(t):
    img = Image.new("RGBA", (w, h))
    if t >= START:
        p = min((t - START) / SLAP, 1)
        scale = 1 + 0.35 * (1 - p) ** 2  # big and close, then pressed flat onto the frame
        s = full.resize((round(full.width * scale), round(full.height * scale)), Image.LANCZOS)
        img.alpha_composite(s, (round(w * X - s.width / 2), round(h * Y - s.height / 2)))
    return img


def probe(path):
    info = json.loads(subprocess.check_output(["ffprobe", "-v", "error", "-select_streams", "v:0", "-show_entries",
                                               "stream=width,height,r_frame_rate:format=duration", "-of", "json", path]))
    s = info["streams"][0]
    num, den = s["r_frame_rate"].split("/")
    return s["width"], s["height"], s["r_frame_rate"], float(num) / float(den), float(info["format"]["duration"])


def render(src, out):
    """Draw overlay(t) on every frame of src and save to out, keeping the audio."""
    ff = subprocess.Popen(["ffmpeg", "-y", "-v", "error", "-i", src,
                           "-f", "rawvideo", "-pix_fmt", "rgba", "-s", f"{w}x{h}", "-r", rate, "-i", "-",
                           "-filter_complex", "[0:v][1:v]overlay=shortest=1,format=yuv420p[v]",
                           "-map", "[v]", "-map", "0:a?", "-c:v", "libx264", "-crf", "18", "-c:a", "copy", out],
                          stdin=subprocess.PIPE)
    for i in range(math.ceil(duration * fps)):
        ff.stdin.write(overlay(i / fps).tobytes())
    ff.stdin.close()
    if ff.wait():
        sys.exit("ffmpeg failed")


src, out = sys.argv[1:3]
w, h, rate, fps, duration = probe(src)
full = sticker()
render(src, out)