{
  "$schema": "https://raw.githubusercontent.com/guitaripod/wwdc-sessions/master/schema/session.schema.json",
  "schemaVersion": 1,
  "id": "wwdc2026-256",
  "event": "wwdc2026",
  "eventName": "WWDC26",
  "year": 2026,
  "eventContentId": 256,
  "title": "Discover generated subtitles and subtitle styles",
  "description": "Make your video content more accessible with generated subtitles — a powerful new feature that can transcribe spoken audio or translate subtitles from another language, using on-device models. Explore caption style preview, which lets people customize and preview subtitle styles during playback, and dive into implementation details for AVKit, AVPlayerLayer, and the Media Accessibility framework.",
  "url": "https://developer.apple.com/videos/play/wwdc2026/256",
  "sosumiURL": "https://sosumi.ai/videos/play/wwdc2026/256",
  "type": "Video",
  "publishedAt": "2026-06-08T14:00:00-07:00",
  "platforms": [
    "iOS",
    "iPadOS",
    "macOS",
    "tvOS",
    "visionOS"
  ],
  "keywords": [],
  "topics": [
    "Accessibility & Inclusion",
    "Audio & Video"
  ],
  "primaryTopic": "Audio & Video",
  "duration": 660,
  "hasTranscript": true,
  "transcriptWordCount": 1378,
  "availableLanguages": [
    "eng",
    "fra",
    "jpn",
    "kor",
    "por",
    "spa",
    "zho"
  ],
  "media": {
    "hls": "https://devstreaming-cdn.apple.com/videos/wwdc/2026/256/4/d28efb5e-5550-468d-b1d1-caec51ce55e6/cmaf.m3u8",
    "downloadHLS": "https://devstreaming-cdn.apple.com/videos/wwdc/2026/256/4/d28efb5e-5550-468d-b1d1-caec51ce55e6/cmaf-download.m3u8",
    "downloadSD": "https://devstreaming-cdn.apple.com/videos/wwdc/2026/256/4/d28efb5e-5550-468d-b1d1-caec51ce55e6/downloads/wwdc2026-256_sd.mp4",
    "downloadHD": "https://devstreaming-cdn.apple.com/videos/wwdc/2026/256/4/d28efb5e-5550-468d-b1d1-caec51ce55e6/downloads/wwdc2026-256_hd.mp4",
    "duration": 660
  },
  "codeSnippets": [
    {
      "title": "Implement subtitle style preview",
      "language": "swift",
      "startTimeSeconds": 463,
      "code": "// Implement subtitle style preview\n\nimport AVFoundation\nimport MediaAccessibility\n\nfunc updateProfileList() {\n    subtitleStyleProfileIDs = MACaptionAppearanceCopyProfileIDs() as? [String] ?? []\n}\n\nfunc showPreviewStyle(subtitleStyleProfileID: String) {\n    playerLayer.setCaptionPreviewProfileID(subtitleStyleProfileID, position: .zero, text: nil)\n}\n\nfunc stopPreviewStyle() {\n    playerLayer.stopShowingCaptionPreview()\n}\n\nfunc setSubtitleStyle(subtitleStyleProfileID: CFString) {\n    MACaptionAppearanceSetActiveProfileID(subtitleStyleProfileID)\n}"
    }
  ],
  "resources": [
    {
      "title": "What's new in HTTP Live Streaming",
      "url": "https://developer.apple.com/streaming/Whats-new-HLS.pdf",
      "type": "documentation",
      "description": "WWDC25 Updates to HTTP Live Streaming (HLS) specification",
      "sosumiURL": "https://sosumi.ai/streaming/Whats-new-HLS.pdf"
    }
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  "path": "sessions/wwdc2026/256-discover-generated-subtitles-and-subtitle-styles/",
  "files": {
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    "readme": "sessions/wwdc2026/256-discover-generated-subtitles-and-subtitle-styles/README.md",
    "transcript": "sessions/wwdc2026/256-discover-generated-subtitles-and-subtitle-styles/transcript.md",
    "transcriptJSON": "sessions/wwdc2026/256-discover-generated-subtitles-and-subtitle-styles/transcript.json"
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}