Feature Tour

Searching for a company that can help with all of your closed captioning and subtitle needs, quickly, affordably, and with great customer support? Search no further.

Closed Captions

Start with a clear recording and a transcript and AST will produce closed captions with precise timecodes ready for use on any video platform. We offer nearly 100 different caption output formats, including many that are only available from AST. Choose as many formats as you need at no extra charge, and receive your caption files within minutes via download, email, or delivered directly to your video platform. No transcript? We’ll transcribe your videos for you, accurately and quickly.

Live Captioning

Our live captioning services include remote CART and remote text interpreting for educational settings, and also remote captioning for events and live broadcasts. Our large network of NCRA-certified captionists allows us to schedule an appropriate captionist for each session, with on-call backups available in the case of emergencies. For complex subject areas a need to go beyond NCRA certifications, finding captionists with appropriate background, subject matter expertise, and ongoing preparation required to provide high-quality services. We work with each customer to find the best captionists for the job at hand.

Audio Description

In order to communicate visual information in educational video content to the blind, AST has developed a service and innovative delivery method for Extended Audio Description (WCAG 2.0 SC 1.2.7), which is a more thorough form of audio description than standard audio description (WCAG 2.0 SC 1.2.5). With extended audio description, the video is paused when descriptions are required, allowing enough time to fully communicate the visual information and make the educational content accessible to those who are blind or have low vision. Our audio descriptions meet WCAG 2.0 Level AAA standards. See how extended audio descriptions work here.


Accuracy is a primary concern for educational and informational content, and AST addresses this need by utilizing trained transcribers recruited from the most demanding environments. For specialized topic areas, such as medical transcription, we can assign content to one of several specialized teams. And despite our painstaking attention to detail, turnaround is extremely fast and affordable. Choose three business day, one business day, or 8 hour turnaround. Transcription is currently available for English, Spanish, and French content.

Caption Translations

Leverage the caption timing from the original language CaptionSync captions and translate your captions to add more value to your videos and broaden your audience. We use professional translators to yield a translation based on duration of the media – NOT by a word or page count. Spanish/English and French/English are available today, with other languages coming soon. You can also provide your own translation for other romance languages such as, German, Dutch, Italian, and Portuguese.

Video Encoding

Receive an encoded MP4 file with the captioning appearing in the subtitle field, ready for use with any player or device that supports MP4 videos and subtitles, including JW Player, Flowplayer, QuickTime, iPad, iPhone, iPod, and iTunes. Another option is to have AST encode your video with open captions, which are always displayed as part of the video image. Learn more about our video encoding options here.

Production Transcripts

Production transcripts, or time-coded transcripts, are full transcripts of your media file with a periodic time stamp. Time stamps are typically placed at every speaker change, and periodically within a speaker’s monologue. CaptionSync allows you to select the frequency of time stamps to suit your needs. Production transcripts are helpful for video editors to quickly locate segments of interest for editing — saving significant time in post production. Production transcripts can also be used for interviews, focus groups, depositions, and panel discussion recordings.


AST provides a number of tools for our users that make the captioning process easier, including our online caption editor for quick caption edits, our AST-Link bulk uploader for cases when you have multiple video files to upload, an integration with Dropbox, and our Smart Player, which provides enhanced caption features such as interactive transcripts and video search functionality.

Support Center

AST strives to make captioning as simple as possible with AST, but the number of applications and players that ingest caption files is immense, so the topic can get complex. To address this, AST devotes significant resources to supporting our users. Our extensive Support Center has FAQs, knowledge base articles, best practice articles, and tutorial videos. Search functionality helps users locate the information they need, and users may also submit support tickets to have their specific questions addressed directly. Our users rate our support with a satisfaction rating of over 98%.

Other Services

If you have feature films, television dramas, or other dramatic narrative content destined for television, DVD, iTunes, Amazon Instant Video, Hulu, Netflix, or other video on demand (VOD) services, AST’s Cinema Certified Result Review is the appropriate service for your post-production closed captioning needs. Customers with moderately sweetened content can take advantage of our standard Result Review service. Copy Editing, DVD/MP4 transfer service, workflow integration assistance, and video SEO round out our service offerings.

Get Started

Captioning your content and making it accessible doesn’t need to be complex. We’re here to help. Call us at (877) 278-7962 or initiate a chat if you have any questions. If you’re ready to create an account, click get started and we’ll walk you through it.