How to add a review card overlay with Claude

Add a customer review card to input.mp4. Draw a white rounded rectangle 84% of the frame width (corner radius 3.4% of the width) with a soft black drop shadow, centered across, its top edge 66% down the frame. Inside, with a padding of 5% of the frame width: a row of five gold (255, 185, 0) five-pointed stars, each 5.6% of the frame width across; below them the quote “My skin has never looked this bright. Obsessed!” in bold near-black (25, 25, 30) text 4.8% of the frame width tall, wrapped to the card; below that “— Jess M.” in bold near-black and “Verified buyer” in grey (130, 130, 140), both 3.6% of the frame width tall. Nothing shows before 0.6 seconds; then the card slides in from fully off the left edge to its centered spot over 0.45 seconds with an ease-out (cubic), and 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
"""Review card overlay: a white customer review card with five gold stars, a quote and a name slides in from the left.

Usage: python3 review-card-overlay.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

QUOTE = "My skin has never looked this bright. Obsessed!"  # the review text
NAME = "Jess M."         # who wrote it
BYLINE = "Verified buyer"  # small grey line after the name
STARS = 5                # gold stars out of five
START = 0.6              # second the card starts sliding in
SLIDE = 0.45             # seconds the slide takes
WIDTH = 0.84             # card width as a share of the frame width (centered across)
TOP = 0.66               # card top edge, as a share of the frame height
GOLD = (255, 185, 0)     # star color
FONTS = ["/System/Library/Fonts/Supplemental/Arial Bold.ttf",     # macOS
         "/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf",  # Linux
         "C:/Windows/Fonts/arialbd.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 wrap(draw, text, font, width):
    lines = [""]
    for word in text.split():
        trial = f"{lines[-1]} {word}".strip()
        if draw.textlength(trial, font=font) <= width or not lines[-1]:
            lines[-1] = trial
        else:
            lines.append(word)
    return lines


def star(draw, cx, cy, r, fill):
    points = [(cx + (r if i % 2 == 0 else r * 0.45) * math.sin(i * math.pi / 5),
               cy - (r if i % 2 == 0 else r * 0.45) * math.cos(i * math.pi / 5)) for i in range(10)]
    draw.polygon(points, fill=fill)


def card():
    """The review card with a soft shadow, as an RGBA image."""
    cw, pad = round(w * WIDTH), round(w * 0.05)
    quote_font = ImageFont.truetype(FONT_FILE, round(w * 0.048))
    name_font = ImageFont.truetype(FONT_FILE, round(w * 0.036))
    measure = ImageDraw.Draw(Image.new("RGBA", (1, 1)))
    lines = wrap(measure, f"\u201c{QUOTE}\u201d", quote_font, cw - 2 * pad)
    r, line_h = round(w * 0.028), round(quote_font.size * 1.3)
    ch = pad + 2 * r + round(pad * 0.6) + line_h * len(lines) + round(pad * 0.4) + name_font.size + pad

    shadow = round(w * 0.03)
    img = Image.new("RGBA", (cw + 2 * shadow, ch + 2 * shadow))
    shade = Image.new("RGBA", img.size)
    ImageDraw.Draw(shade).rounded_rectangle([shadow, shadow + 6, shadow + cw, shadow + ch + 6], r * 1.2, fill=(0, 0, 0, 110))
    img.alpha_composite(shade.filter(ImageFilter.GaussianBlur(shadow / 2)))
    draw = ImageDraw.Draw(img)
    draw.rounded_rectangle([shadow, shadow, shadow + cw, shadow + ch], r * 1.2, fill="white")

    x, y = shadow + pad, shadow + pad
    for i in range(5):
        star(draw, x + r + i * r * 2.4, y + r, r, GOLD if i < STARS else (215, 215, 215))
    y += 2 * r + round(pad * 0.6)
    for line in lines:
        draw.text((x, y), line, font=quote_font, fill=(25, 25, 30))
        y += line_h
    y += round(pad * 0.4)
    draw.text((x, y), f"\u2014 {NAME}", font=name_font, fill=(25, 25, 30))
    draw.text((x + draw.textlength(f"\u2014 {NAME}  ", font=name_font), y), BYLINE, font=name_font, fill=(130, 130, 140))
    return img, shadow


def overlay(t):
    img = Image.new("RGBA", (w, h))
    if t >= START:
        p = min((t - START) / SLIDE, 1)
        ease = 1 - (1 - p) ** 3
        x = round(-full.width + (w + full.width) / 2 * ease)  # off the left edge -> centered
        img.paste(full, (x, round(h * TOP) - shadow))  # paste clips the part still off screen
    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, shadow = card()
render(src, out)