Using the Closed Caption Editor

Fast, accurate, reliable closed caption editing in Ambassador-64.

 

Introduction

When editing closed captions, we wanted an editor that could meet the following conditions.

 

Although we did experiment with various closed caption editors, there was always at least one thing missing from our list of conditions, so we decided to include one of our own in Ambassador-64.

Our closed-caption editor is purposely sparse to promote the fastest yet most accurate completion of closed captions that can possibly be achieved.

The editor has only seven buttons and a single context-sensitive menu, both of which are described in the following section.

 

Activity Description

The following illustration and table entries describe the controls found on the Closed Captions panel.

 

Key

Name

Description

A

Open Media

Click to open the video or audio media file.

B

Open Captions

Click the open the WebVTT format captions file.

C

Save Captions

Click to save the changes to the current WebVTT captions file. This button is only enabled when changes have been made to captions.

D

Current Time Offset

Text display of the currently selected time offset from zero.

E

Video Viewer

Dynamically sized video viewport. When the window is running in full-screen mode, the video is expanded to take all available space within its section of the form.

F

Current Caption

The caption content at the currently selected time.

G

Current Time Marker

Visual indicator of the currently selected time offset from zero.

H

Audio Waveforms

Audio waveform of the currently loaded media asset.

I

Caption Editor

Caption bubble editor. Hover over the caption to edit then press [F2] to start edit mode.

J

Selection Start Time

The start time at which to repeat a loop.

K

Selection End Time

The end time at which to repeat a loop.

L

Skip Backward Five Seconds

Set the current time back five seconds from the current location.

M

Stop

Stop the player.

N

Play / Pause

Toggle between play and pause on the player.

O

Skip Forward Five Seconds

Set the current time forward five seconds from the current location.

P

Context-Sensitive Menu

Menu displayed when you right-click on the caption editor section.

-       Current Time. Set the current time offset using a text box control.

-       Selection Start Time. Set the start time of the selection using a text box control.

-       Selection End Time. Set the end time of the selection using a text box control.

-       Select Time from Caption. Set the current time offset to match the beginning of the selected caption.

-       Edit Text. Edit the text content of the selected caption.

-       Edit Width. Edit the width of the caption, in decimal seconds format.

-       Insert Space. Insert a blank space at the beginning of the selected caption.

-       Insert Caption. Insert a new text caption at the beginning of the selected caption.

-       Delete Caption. Delete the selected caption.

-       Snap Caption to Selection. Align the left and right edges of the caption with the start and end edges of the selection.

-       Caption Properties. Display information about the caption, such as its starting time, width, in seconds, text, and other interesting attributes.

 

 

Closed-Caption Workflow Example

Much work in creating closed captions is a direct function of how the speech is captured to text. In many cases, the text is first captured by human transcriptionists then arranged for timing. In our case, we have been able to establish a successful workflow using Microsoft Stream as our original capture medium. Using this approach, the speech from a video is not only recognized and converted to text, but that text is in closed-caption format to begin with. We often-times also experience the benefit of seeing that phrases will begin at the exact timing at which they are expected, greatly reducing any amount of work on our end.

Of course, AI speech recognition isn't perfect, so we have our share of clip editing when it comes to misunderstood acronyms and contemporary slang phrases, if nothing else.

In this section, we'll cover the digitized audio capture workflow for a video file on Microsoft Stream, an included component in the Office 365 for Business suite.

 

 

 

 

 

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