https://github.com/OwenEdwards/ElephantsDreamHLS

Script and manifest files to create an HLS program containing the Elephants Dream video with captions, subtitles, and audio description
https://github.com/OwenEdwards/ElephantsDreamHLS

accessibility audio-description captions demo hls subtitles video webvtt

Last synced: 8 days ago
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Script and manifest files to create an HLS program containing the Elephants Dream video with captions, subtitles, and audio description

• Host: GitHub
• URL: https://github.com/OwenEdwards/ElephantsDreamHLS
• Owner: OwenEdwards
• Created: 2018-06-26T06:48:48.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2018-07-14T20:18:35.000Z (over 6 years ago)
• Last Synced: 2024-10-14T21:55:35.666Z (about 1 month ago)
• Topics: accessibility, audio-description, captions, demo, hls, subtitles, video, webvtt
• Language: Shell
• Size: 56.6 KB
• Stars: 3
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# ElephantsDreamHLS

Script and manifest files to create an HLS program containing the Elephants Dream video with captions, subtitles, and audio description.

Works on macOS with iTerm2 shell.

## To build the files

Run:

```

ed.sh

```

To clean up all created files, run:

```

clean.sh

```

## Prerequisites

The following tools are needed (some using Homebrew):

```

bash

wget

ffmpeg

sed

cat

```

And from Apple:

```

mediasubtitlesegmenter

mediastreamvalidator

hlsreport.py

```

## TODO

* Meet the Apple [HLS Authoring Specification for Apple Devices](https://developer.apple.com/documentation/http_live_streaming/hls_authoring_specification_for_apple_devices)

* The audio description text (.vtt) track is marked in the master playlist file as having "public.accessibility.describes-video" CHARACTERISTICS. This value is not valid for a SUBTITLES track (only for an AUDIO track), and causes a validation violation, but there is no valid way to mark a text track as the equivalent of HTML kind="descriptions" in HLS.