Function forceMiniSticker

commands/igs.js:273–316

(inputBuffer, isVideo, cropSquare)

// Extreme fallback to force very small stickers when needed
async function forceMiniSticker(inputBuffer, isVideo, cropSquare) {
    const tmpDir = path.join(process.cwd(), 'tmp');
    if (!fs.existsSync(tmpDir)) fs.mkdirSync(tmpDir, { recursive: true });

    const tempInput = path.join(tmpDir, `mini_${Date.now()}.${isVideo ? 'mp4' : 'jpg'}`);
    const tempOutput = path.join(tmpDir, `mini_out_${Date.now()}.webp`);
    fs.writeFileSync(tempInput, inputBuffer);

    const vf = cropSquare
        ? `crop=min(iw\\,ih):min(iw\\,ih),scale=256:256${isVideo ? ',fps=6' : ''}`
        : `scale=256:256:force_original_aspect_ratio=decrease,pad=256:256:(ow-iw)/2:(oh-ih)/2:color=#00000000${isVideo ? ',fps=6' : ''}`;

    const cmd = `ffmpeg -y -i "${tempInput}" ${isVideo ? '-t 2' : ''} -vf "${vf}" -c:v libwebp -preset default -loop 0 -pix_fmt yuva420p -quality 25 -compression_level 6 -b:v 60k "${tempOutput}"`;

    await new Promise((resolve, reject) => {
        exec(cmd, (error) => error ? reject(error) : resolve());
    });

    if (!fs.existsSync(tempOutput)) {
        try { fs.unlinkSync(tempInput); } catch {}
        return null;
    }
    const smallWebp = fs.readFileSync(tempOutput);

    // Re-apply EXIF
    const img = new webp.Image();
    await img.load(smallWebp);
    const json = {
        'sticker-pack-id': crypto.randomBytes(32).toString('hex'),
        'sticker-pack-name': settings.packname || 'KnightBot',
        'emojis': ['📸']
    };
    const exifAttr = Buffer.from([0x49, 0x49, 0x2A, 0x00, 0x08, 0x00, 0x00, 0x00, 0x01, 0x00, 0x41, 0x57, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x16, 0x00, 0x00, 0x00]);
    const jsonBuffer = Buffer.from(JSON.stringify(json), 'utf8');
    const exif = Buffer.concat([exifAttr, jsonBuffer]);
    exif.writeUIntLE(jsonBuffer.length, 14, 4);
    img.exif = exif;
    const finalBuffer = await img.save(null);

    try { fs.unlinkSync(tempInput); } catch {}
    try { fs.unlinkSync(tempOutput); } catch {}

    return finalBuffer;
}

module.exports = { igsCommand };