PlayerLync supports the ability to add Closed Captioning / Subtitles to videos. This feature is supported across all app platforms.

To add Closed Captions to a video you must first create a VTT file. PlayerLync supports the WebVTT standard for this file type. You can review the standard here to understand the structure of the file.

Creating Videos with Closed Captions / Subtitles

There are very specific steps to upload videos with VTT (Closed Caption) files. You must follow these steps to ensure the Closed Captions are properly embedded in the video.

1. Name your MP4 file exactly how you want it to appear in the app. Once you upload the video it should not be renamed to ensure the bundle’s integrity.
2. Name your VTT file the same name as the MP4.
3. At the end of the VTT file name append a hyphen and the language short code of the Closed Caption. The language short code must be in lower case.
   1. The language short code must follow the ISO 639-2 standard.  https://en.wikipedia.org/wiki/List_of_ISO_639-2_codes
   2. You may add multiple VTT files for each language
4. Here is an example of the files:
    
   
5. Upload the video file into the Admin Portal
6. Upload the VTT files into the Admin Portal

Note: 

• The individual VTT files will not appear in the app.
• You will know this process worked if you see a Closed Caption icon in the bottom right of the video player.