Sure, here's an example JSON file and a TypeScript interface for the image SEO properties:

**Image SEO Data (JSON)**

```json
[
  {
    "src": "image1.jpg",
    "alt": "A beautiful sunset over the ocean",
    "title": "Sunset Beach",
    "caption": "Stunning colors paint the sky at sunset on a tropical beach.",
    "fileName": "sunset-beach-tropical.jpg",
    "format": "jpg",
    "size": "800x600",
    "metadata": {
      "location": "Hawaii, USA",
      "camera": "Canon EOS 5D Mark IV",
      "keywords": ["sunset", "beach", "tropical", "ocean"]
    }
  },
  {
    "src": "image2.png",
    "alt": "A modern city skyline at night",
    "title": "City Lights",
    "caption": "The bright lights of a bustling city illuminate the night sky.",
    "fileName": "city-skyline-night-lights.png",
    "format": "png",
    "size": "1200x800",
    "metadata": {
      "location": "New York City, USA",
      "camera": "Nikon D850",
      "keywords": ["city", "skyline", "night", "lights"]
    }
  }
]
```

**TypeScript Interface**

```typescript
interface ImageSEOData {
  src: string;
  alt: string;
  title: string;
  caption?: string;
  fileName: string;
  format: string;
  size: string;
  metadata: {
    location?: string;
    camera?: string;
    keywords: string[];
  };
}
```

In the JSON file, each object represents an image with its associated SEO data. The properties include:

- `src`: The source URL or file path of the image.
- `alt`: The alternative text description for the image.
- `title`: The title of the image.
- `caption` (optional): A caption or additional description for the image.
- `fileName`: The descriptive and keyword-rich file name of the image.
- `format`: The file format of the image (e.g., jpg, png, gif).
- `size`: The dimensions of the image (width x height).
- `metadata`: An object containing additional metadata information about the image, such as location, camera settings, and keywords.

The TypeScript interface `ImageSEOData` defines the structure and types for the image SEO data. It includes all the properties from the JSON file, with appropriate types. The `caption` and `metadata.location` and `metadata.camera` properties are marked as optional using the `?` operator.

You can use this TypeScript interface to define variables, function parameters, or object properties that should conform to the structure of the image SEO data. This ensures type safety and helps catch potential errors during development.

{
  "images": [
    {
      "type": "fullWidth",
      "width": 2400,
      "height": 1600,
      "url": "https://example.com/hero.jpg"
    },
    {
      "type": "large",
      "width": 1500, 
      "height": 1500,
      "url": "https://example.com/product.jpg"
    },
    {
      "type": "banner",
      "width": 1200,
      "height": 628,
      "url": "https://example.com/banner.jpg" 
    },
    {
      "type": "thumbnail",
      "width": 300,
      "height": 300, 
      "url": "https://example.com/thumbnail.jpg"
    },
    {
      "type": "icon",
      "width": 512,
      "height": 512,
      "url": "https://example.com/icon.png"
    }
  ]
}


{
  "@context": "https://schema.org",
  "@type": "ImageObject",
  "contentUrl": "https://example.com/image.jpg",
  "name": "Image Name or Title",
  "description": "Image description or caption",
  "width": 1200,
  "height": 800,
  "thumbnail": "https://example.com/thumbnail.jpg",
  "license": "https://example.com/license",
  "acquireLicensePage": "https://example.com/buy-license",
  "copyrightNotice": "Copyright notice or credit line",
  "creator": {
    "@type": "Person",
    "name": "Creator Name"
  },
  "copyrightHolder": {
    "@type": "Organization", 
    "name": "Copyright Holder Name"
  },
  "contentLocation": "Location depicted in image",
  "datePublished": "2024-05-28",
  "exifData": [
    {
      "@type": "PropertyValue",
      "name": "Exposure Time",
      "value": "1/659 sec."
    },
    {
      "@type": "PropertyValue", 
      "name": "FNumber",
      "value": "f/4.0"  
    }
  ]
}

### Video 


Based on the information provided in the search results, here are the key recommendations for video formats and specifications for the web in 2024:

## Best Video Formats for Web

- MP4 (H.264) - Most widely supported and compatible format across major browsers. Offers a good balance between quality and compression.[1][3][4][7][13][14][20]

- WebM (VP8/VP9) - Open, royalty-free format well-suited for web streaming. Supported by most modern browsers except Safari.[1][3][4][13][14][16]

## Recommended Video Specifications

### Resolution
- Minimum: 640x360 (360p) 
- Recommended: 1280x720 (720p) or 1920x1080 (1080p)
- High-end: 3840x2160 (4K)[2][11][12][14][16][17]

### Aspect Ratio
- 16:9 (landscape/horizontal)[2][11][14][17]
- 9:16 (portrait/vertical)[14][17]
- 1:1 (square)[14][17]

### Frame Rate
- 24-30fps standard
- Up to 60fps for high motion content[2][11][14]

### Bitrate
- 5 Mbps for 720p
- 8 Mbps for 1080p 
- 30 Mbps for 4K[14]

### Audio
- AAC or MP3 codec
- 128-320 kbps stereo[13]

## Tips for Optimal Web Video
- Provide multiple resolutions/bitrates for adaptive streaming[12]
- Keep videos short for better engagement (under 2 minutes ideal)[14]
- Use a reliable video hosting platform for consistent playback 
- Ensure videos are mobile-friendly (proper aspect ratios, responsive)[14][17]
- Add captions/subtitles for accessibility[14]

In summary, MP4 with H.264 is the most universally supported format for web video in 2024, with WebM as a good secondary option. Aim for at least 720p resolution, 16:9 aspect ratio, and 24-30fps for standard content. Optimize bitrates for your target resolutions and provide multiple renditions if possible for the best user experience across devices and connection speeds.

Citations:
[1] https://cloudinary.com/guides/video-formats/top-six-web-video-formats-of-2024
[2] https://www.descript.com/blog/article/video-resolution
[3] https://caniuse.com/?search=video+format
[4] https://www.pixx.io/en/blog/video-format-for-web
[5] https://blog.hootsuite.com/social-media-video-specs/
[6] https://www.brightcove.com/en/resources/blog/what-formats-do-i-need-for-html5-video/
[7] https://www.dacast.com/blog/best-video-codec/
[8] https://www.designrush.com/agency/web-development-companies/trends/website-dimensions
[9] https://developer.mozilla.org/en-US/docs/Web/Media/Formats/Video_codecs
[10] https://www.linkedin.com/pulse/which-best-video-format-embed-websites-buffer-free-videos-blpoc
[11] https://www.websightdesign.com/helpdesk/article?article=12000037633&category=12000001079&folder=5000134798
[12] https://bitmovin.com/html5-video-tag-guide
[13] https://www.videoproc.com/resource/best-video-format.htm
[14] https://blog.contentstudio.io/social-media-video-specs/
[15] https://stackoverflow.com/questions/5959833/what-are-all-the-formats-of-video-supported-by-html5
[16] https://www.webdew.com/blog/video-file-formats
[17] https://influencermarketinghub.com/social-media-video-specs/
[18] https://en.wikipedia.org/wiki/HTML_video
[19] https://www.gumlet.com/learn/video-codec/
[20] https://www.kapwing.com/resources/the-best-youtube-video-formats-in-2022/





--------------------------------------------------------

Certainly! Here's the updated function that allows you to specify the EXIF metadata properties:

```typescript
interface ExifData {
  name: string;
  value: string;
}

interface ImageSEOData {
  src: string;
  alt: string;
  title: string;
  caption?: string;
  fileName: string;
  format: string;
  size: string;
  metadata: {
    location?: string;
    camera?: string;
    keywords: string[];
    exifData: ExifData[];
  };
}

function generateDefaultImageJSONLD(imageData: ImageSEOData) {
  return {
    "@context": "https://schema.org",
    "@type": "ImageObject",
    "contentUrl": imageData.src,
    "name": imageData.title,
    "description": imageData.caption || imageData.alt,
    "width": parseInt(imageData.size.split('x')[0]),
    "height": parseInt(imageData.size.split('x')[1]),
    "thumbnail": `https://example.com/thumbnails/${imageData.fileName}`,
    "license": "https://example.com/license",
    "acquireLicensePage": "https://example.com/buy-license",
    "copyrightNotice": `© ${new Date().getFullYear()} Default Organization`,
    "creator": {
      "@type": "Person",
      "name": "Default Creator Name"
    },
    "copyrightHolder": {
      "@type": "Organization", 
      "name": "Default Organization Name"
    },
    "contentLocation": imageData.metadata.location || "Unknown location",
    "datePublished": new Date().toISOString().split('T')[0],
    "exifData": imageData.metadata.exifData.length > 0 ? imageData.metadata.exifData : [
      {
        "@type": "PropertyValue",
        "name": "Camera",
        "value": imageData.metadata.camera || "Unknown camera"
      },
      {
        "@type": "PropertyValue",
        "name": "Keywords",
        "value": imageData.metadata.keywords.join(', ')
      }
    ]
  };
}

// Example usage
const imageData: ImageSEOData = {
  src: "https://example.com/image.jpg",
  alt: "A beautiful scenery",
  title: "Beautiful Scenery",
  caption: "A beautiful scenery with mountains and a lake.",
  fileName: "scenery.jpg",
  format: "image/jpeg",
  size: "1200x800",
  metadata: {
    location: "Mountain Lake",
    camera: "Canon EOS 5D Mark IV",
    keywords: ["scenery", "mountain", "lake"],
    exifData: [
      {
        name: "Exposure Time",
        value: "1/659 sec."
      },
      {
        name: "FNumber",
        value: "f/4.0"
      },
      {
        name: "ISO",
        value: "100"
      }
    ]
  }
};

console.log(JSON.stringify(generateDefaultImageJSONLD(imageData), null, 2));
```

This version of the function includes an `ExifData` interface to define the structure of each EXIF metadata entry. The `ImageSEOData` interface now includes an `exifData` array within the `metadata` object. The `generateDefaultImageJSONLD` function uses this array to populate the EXIF data in the JSON-LD output. If no EXIF data is provided, it falls back to default values for camera and keywords.