Yesterday we released MediaCore’s new Media Uploader, which introduced support for closed captioning. It’s simple to add captions to your video in MediaCore: Simply create an SRT or WebVTT file and upload it alongside the corresponding video in your MediaCore library.
Update on 6th April 2015 — We published a free eBook: The Complete Guide to Closed Captioning and Educational Video Accessibility. Click here to download it for free.
Caption files such as SRT and VTT provide a simple set of instructions, telling the video player to display text at a set timecode, for a specified duration. While it’s possible to create these files using a plain text editor, there are also several apps available that make the process easier. These are the best we’ve found:
Aegisub is the best free app we've found for both Mac and Windows.
Aegisub doesn’t support video playback, but you’ll probably want to have your video open in a web or desktop video player to reference as you create captions.
In Aegisub, simply enter your caption text alongside a start and finish timecode and click the green arrow to save it.
Repeat this for the duration of the video.
Click File > Export as... and make sure to add .srt as the file extension.
HTML5 Video Caption Maker (Free, web)
Microsoft offers a free, web-based captioning tool. You’ll first need to point the tool to the video you’d like to caption. It’s easy to do this with a video in your MediaCore library:
First, make sure that the MediaCore video you are using is shared with the public (this is a necessary step to ensure that Microsoft’s Caption Maker can see your video, but a video only needs to be shared publicly for as long as you are creating captions) .
Navigate to the video and select the Download button. Right-click Copy link.
Paste it into Video Caption Maker’s URL of video file field.
Pause the video at a point where you’d like to add text, type out a caption and click Save & continue to see your caption added to the caption list below with a time stamp.
Rinse and repeat for the duration of the video you’d like to caption.
- When you’re done, copy the full text and paste it into a blank text document, then save the document as [your title].vtt.
Subs Factory ($7.99, Mac)
Subs Factory is a full-featured, native Subtitling app for Mac OS X. It provides an easy, visual display of your subtitles’ durations and location in a video’s timeline, as well as making it easy to jump to any subtitle within the video player.
Simply click the yellow note button while your video is playing to add a three second subtitle block at that timecode.
Enter your text and change the duration of the subtitle if necessary, and repeat as many times as you need.
- When you’re ready to save your SRT file, click Export.
You can read more about how MediaCore’s video player reads caption files in our support documentation.