Posted in Summer 2016

A Reflection and Step-by-Step Process of Using Open-Source Software to Closed Caption Video

In the past week, at the 2016 Digital Media and Composition Institute at The Ohio State University, we were each tasked with creating a Concept in 60 video. This video must explore a concept of literacy, composing, or multimodality and must be exactly 60 seconds—no more, no less—including the title screen and credits.

Because I have done the “Concept in 60” project in the past at my home institution (University of Louisville), I wanted to challenge myself with my DMAC 2016 approach by creating three specific rhetorical constraints for myself. The first was to use original (video clips I shot, sound I recorded) material as much as possible; the second was to focus on the audio track more than the visual since I had never done so in the past; and the third was to include a closed captioning track on the Mp4 file version of my video—and to do this all using FREE software.

While the first two goals were attained by my recording my own sound files, shooting my own video to go with it, and editing my files in iMovie and Audacity on my Mac—the final product contains all original material with the exception of the creative-commons-licensed music track underlaying my ambient noise and voice tracks and a short clip of the OSU library used with permission from the Institute.

The third goal, however, presented a great challenge. While it might seem as simple as uploading my MP4 file to YouTube, using YouTube’s closed captioning tool, and downloading the Mp4 file off of YouTube, unfortunately the captioning track does not get “burned onto” the video file and therefore does not download with the MP4 off YouTube. In other words, these are OPEN captions, not CLOSED captions. However, you CAN download just the .srt captioning track file (as visualized below) and use other software to attach it back to the MP4 file.

After a few hours of tinkering during our final studio time Thursday, and with the excellent help and brain power of our fearless associate director of DMAC, Erin Kathleen Bahl, I found a way to attain success in my closed captioning goal.

Here, I will recap the winning steps, but first I want to note that the “failure” moments are omitted for the sake of clarity here, not because they weren’t productive in some form – with digital projects, I’ve learned it’s important to take risks and play, that failure is part of the learning process. In this case, we were not successful using VLC or solely YouTube to create the closed captioned version of my Concept in 60, but through lots of googling, playing, failing, more googling, and more playing and failing, we learned some strategies for achieving the captioning goal as well as some new-to-us software.

To begin, I uploaded my video to YouTube and created a closed captioning track. The captioning tool is located under the EDIT drop down menu that you want to close caption in the video manager section of your YouTube account as pictured below.

Screen Shot 2016-05-13 at 10.45.48 PM
This image is a screen capture of the YouTube video-editing interface. It shows the EDIT drop-down menu, which cascades downward from a point just to the right of a thumbnail of the video I’m about to edit. On the drop-down menu, the item “Subtitles & CC” is selected.

From here, you can add subtitles and time them with your video. (For a detailed step-by-step of this process, see this YouTube help page.

Screen Shot 2016-05-13 at 10.46.01 PM
This image is a screen capture of YouTube’s subtitle- and closed-captioning-editing and management interface. It shows the video I’m editing on the left with the “Add new subtitles or CC” option selected.
Screen Shot 2016-05-13 at 10.46.27 PM
This image is a screen capture of YouTube’s transcription and timing editing interface for captioning videos. On the left is the video I am editing around the 8-second mark; on the right the transcription line for that second is selected and reads “All I could think about is the crane.”

After publishing these captions, export the .srt caption track file from YouTube’s caption tool. While exporting the mp4 file would ideally do the trick, I learned (from failing a few times and reading some sites on the issue) the caption track is not burned into the mp4 and therefore does not carry with it outside of YouTube.

Screen Shot 2016-05-13 at 10.47.17 PM
This image is a screen capture of YouTube’s “view published subtitles and CC: English” interface. On the left is the video post-caption editing; on the right side, the transcription track is visible. On the “Actions” drop-down menu, the “.srt” option is selected.

From here, the next step involves a different software called HandBrake, an open-source video transcoder. Begin by clicking “File,” and selecting the “Open Source” option. Then, navigate to the uncaptioned video file.

This image is a screen capture of the HandBrake interface. The “File” drop-down menu is open with “Open Source” selected.

In the “Destination” section, click “Browse” and select where to save the final video.

This image is a screen capture of the HandBrake interface. A red circle is drawn on the “Browse” option to indicate its selection.

Select the “Subtitles” tab.

This image is a screen capture of the HandBrake interface. A red circle in the center of the image indicates that “Subtitles” is selected.

Under “Track,” select “Add External SRT” and navigate to the saved subtitle file.

This image is a screen capture of the HandBrake interface. The drop-down menu “Track” is open with a red circle indicating that “Add External SRT…” is selected.

Select the “Burned In” option to insure that captions get “burned” into the MP4 file.

This image is a screen capture of the HandBrake interface. A red circle in the center of the screen indicates that the “Burned In” option is enabled.

Finally, under “File,” select “Start Encoding.”

This image is a screen capture of the HandBrake interface. The “File” drop-down menu is open with a red arrow indicating that “Start Encoding” should be selected.

And that’s it. The video file should now be closed captioned.

Screen Shot 2016-05-14 at 11.33.12 AM
This image is a screen capture of the video edited in this example with the caption “I walked around campus” at the bottom.

This process illuminated the lack of closed captioning tools in production software. As exemplified here, I needed to use three different applications (iMovie, YouTube, and HandBrake) in order to create a close-captioned video file I could have locally rather than in a web video space like YouTube. As we continue to design software for editing video, closed-captioning tools should be an intuitive part of editing software. Because while it’s never too late to think about captioning and accessibility, we should move toward making it an integral part of the overall design process.

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