YouTube Audio Stats Volume Normalization Tool For Mp2 Mp3 Opus And Ac3

function processImage(originalImg, audioFormat = "Opus", volumeNormalization = "-19.0dB/-14.0dB") {
    // Creating a canvas to draw the overlay
    const canvas = document.createElement('canvas');
    const ctx = canvas.getContext('2d');
    
    // Set canvas size equal to the original image
    canvas.width = originalImg.width;
    canvas.height = originalImg.height;

    // Draw the original image onto the canvas as the background
    ctx.drawImage(originalImg, 0, 0);

    // Mockup data for YouTube 'Stats for nerds'
    const stats = [
        { label: "Video ID / sCPN", value: "jBk4L_xPq1z / 9ZkN3" },
        { label: "Viewport / Frames", value: `${canvas.width}x${canvas.height}*1.00 / 0 dropped` },
        { label: "Current / Optimal Res", value: `${canvas.width}x${canvas.height}@60 / ${canvas.width}x${canvas.height}@60` },
        { label: "Volume / Normalized", value: `100% / 100% (content loudness ${volumeNormalization})` },
        { label: "Codecs", value: `vp09.00.51.08.01.01.01.01.00 (248) / ${audioFormat} (251)` },
        { label: "Color", value: "bt709 / smpte170m" },
        { label: "Host", value: "r4---sn-ab5l6nsk.googlevideo.com" },
        { label: "Connection Speed", value: "54231 Kbps" },
        { label: "Network Activity", value: "0 KB" },
        { label: "Buffer Health", value: "24.5 s" }
    ];

    const padding = 15;
    const lineSpacing = 22;
    
    // Set font for measuring text widths
    ctx.font = "13px Arial, sans-serif";
    
    let maxLabelWidth = 0;
    let maxValueWidth = 0;
    
    // Calculate required width based on text length
    stats.forEach(stat => {
        const lWidth = ctx.measureText(stat.label).width;
        const vWidth = ctx.measureText(stat.value).width;
        if (lWidth > maxLabelWidth) maxLabelWidth = lWidth;
        if (vWidth > maxValueWidth) maxValueWidth = vWidth;
    });

    // Box dimensions
    const boxWidth = maxLabelWidth + maxValueWidth + padding * 3.5;
    const boxHeight = padding * 2.5 + (stats.length + 1) * lineSpacing; 

    // Handle potential overflow on very small image dimensions
    let scale = 1;
    if (boxWidth > canvas.width || boxHeight > canvas.height) {
         scale = Math.max(0.2, Math.min(canvas.width / (boxWidth + 20), canvas.height / (boxHeight + 20)));
    }

    ctx.save();
    ctx.scale(scale, scale);

    const x = 10;
    const y = 10;

    // Draw slightly transparent dark box for "Stats for nerds" pane
    ctx.fillStyle = "rgba(28, 28, 28, 0.85)";
    ctx.fillRect(x, y, boxWidth, boxHeight);

    // Header - Title
    ctx.font = "bold 14px Arial, sans-serif";
    ctx.fillStyle = "white";
    ctx.fillText("Stats for nerds", x + padding, y + padding + 10);
    
    // Header - Close Button Mockup
    ctx.fillStyle = "#888888";
    ctx.fillText("X", x + boxWidth - padding - 15, y + padding + 10);

    // Draw Stats Details
    ctx.font = "13px Arial, sans-serif";
    stats.forEach((stat, i) => {
        const lineY = y + padding + 10 + (i + 1) * lineSpacing;

        // Label Column
        ctx.fillStyle = "#aaaaaa";
        ctx.fillText(stat.label, x + padding, lineY);

        // Value Column
        ctx.fillStyle = "#ffffff";
        ctx.fillText(stat.value, x + padding * 2.5 + maxLabelWidth, lineY);
    });

    ctx.restore();

    return canvas;
}