How do I create, upload and view a caption file?

You can add WebVTT or SRT caption files to read along with your videos. 

MediaCore currently supports caption files in the WebVTT, SRT, and DFXP formats.

Caption files provide a simple set of instructions, telling the video player to display text at a set timecode, for a specified duration. You can create these files using a simple text editor, such as "TextEdit" for Mac.

To create a VTT file from scratch follow the example below:

The TimeStamp for a WebVTT file must be: HH:MM:SS:MSEC  -->  00:00:00.000

Creating a Caption file

There are also several tools available that make the process easier. Here are a few of our favourites: If you'd prefer to create your caption file using a simple text editor then we recommend using the HTML5 Video Caption tool to create the subtitles. 
  1. ‚ÄčIf you're using the HTML5 Video Caption tool make sure that that the MediaCore video you're using is shared with the public (this is a necessary step to ensure that the Caption Maker can see your video). 
  2. Next, navigate to the video and select the 'Download' button. Right click on 'Copy link'.
  3. Paste the link into Video Caption Maker's URL field.
  4. Pause the video at a point where you'd like to add text, type out a caption and click 'Save & continue'.
  5. Repeat this for the duration of your video.
  6. When you're done copy the full text into a blank text editor and save the document as [your file].vtt.
  7. Before you upload your file we recommend making sure it's valid. To do this navigate to the WebVTT validator and enter your text into the textbox provided. The validator will let you know if there's anything you need to change before proceeding.

Uploading your subtitles to MediaCore

  1. If your file is valid, navigate to your MediaCore site and upload the file to an existing video or add it to a new media item.
  2. Keep in mind that the video must be 100% uploaded before you can add a subtitle file.
  3. To add the captions either click "Edit" next to an existing video or navigate to the "Add New Media" page.
  4. Click on "Add file" next to subtitles and select a file from your computer.

 5. Once the file's uploaded click "Update" or "Publish".
 6. Now that the video has subtitles, viewers can toggle closed cations on or off using the video player's 'CC' button. 


Sep. 03, 2015