Web & Mobile Device Captioning
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Closed Captioning Products Article Web & Mobile Device Captioning Closed captioning products Challenges for IP/Web Video Captioning MacCaption and CaptionMaker For broadcast video, there is one specific area in the video signal where allow you to easily author, edit, captions are placed. Since there is only one broadcast specification for all of encode and repurpose video North America, every TV station has the equipment necessary to insert the captions for television, web and captions, and every TV sold in the region can receive them. mobile delivery. Utilizing exclusive e-Captioning™ technology, For web video, there are a number of different standards and types of video MacCaption (for Mac) and playback mechanisms (Flash, Silverlight, HTML5, QuickTime, HLS, HDS, MS CaptionMaker (for Windows) Smooth Streaming, MPEG DASH, UltraViolet, etc.). To support a broad variety simplify the process of complying of different playback devices, a provider may need to stream the video in with FCC regulatory requirements, multiple formats, because there is no one video format that is supported by enabling greater access to every device. broadcast content for television, online and mobile viewers. Until now most of the focus on web captioning has been video on demand (non-live video) which has pretty broad captioning support across the different formats, but live captioning has mostly been an afterthought. Telestream’s goal is to work with live streaming providers, encoder manufacturers, etc. to cooperate on the necessary pieces of the puzzle to enable live web video with captions. Post-production Web Captioning: Telestream captioning software, CaptionMaker and MacCaption, support a large number of formats for captioning video files for video on demand (VOD) on the web, including: • SMPTE Timed Text (SMPTE 2052): A new standard for captioning for both broadcast and the web, also for UltraViolet (DECE CFF format) • WebVTT: Another new standard for captioning and subtitling web videos, frequently used with HTML5 and Apple HLS streaming • H.264 SEI Embedded Captions: Used for Akamai and Wowza VOD streaming • DFXP (TTML): Used by many Flash players and providers such as Brightcove, Limelight, Flowplayer, JW Player, etc. • iTunes Timed Text (iTT): Used for delivery to iTunes • SRT: Supported by many Flash players and also YouTube • SCC: Supported by YouTube and some other web video players Live Web Captioning: The difficulty with live web captioning is how to get the caption data from the source (broadcast feed, etc.) to the end user. Most web streaming encoders and web technologies were designed to convey only video and audio, not captions. Captioning Products Article Uvault, a live streaming provider and content delivery • Programming that is already in the video network, has added closed captioning support to its programming distributor’s or provider’s library network. Telestream’s live captioning software can send before it is shown on television with captions must the captions to Uvault’s servers, which then deliver them be captioned: to the end users along with the video. • Within 45 days after it is shown on television with captions on or after March 30, 2014 and Another option is Wowza Media Server, which as of before March 30, 2015 version 3.6 can receive embedded CEA-608 captions inside the video stream and pass them on to the • Within 30 days after it is shown on television clients. If your video encoder can insert/preserve CEA- with captions on or after March 30, 2015 and 608 captions into the encoded stream which is sent before March 30, 2016 to Wowza, then it can deliver various types of captions • Within 15 days after it is shown on television to the viewers, depending on what kind of device or with captions on or after March 30, 2016 software they’re using to view the stream. If you are a TV broadcaster, then your captioned broadcast feed To see the actual FCC web captioning regulations, see should already contain CEA-608 captions. All you need below: is a web encoder (e.g. H.264 streaming encoder) that will http://www.fcc.gov/encyclopedia/twenty-first-century- preserve the CEA-608 closed captions data. communications-and-video-accessibility-act-0 Telestream is eager to work with other streaming The process to add closed captioning to web files is providers and encoder manufacturers to enable live called e-captioning. Continue reading below to see how closed captioning support in their streaming web video Telestream’s closed captioning software can help you products. meet the new web closed captioning regulations. FCC Regulations for IP Captioning Web formats with Closed Captions Accessibility Act of 2010 Chart of Deadlines Mobile Devices Closed Captioning On January 13, 2012, the FCC released a Report and Many mobile devices already support closed captions, Order adopting rules for closed captioning of video although they require the captions in different formats programming delivered using Internet protocol (the “IP depending on the device. With Telestream software it is closed captioning rules”). These new closed captioning easy to create captioned videos that work on multiple rules were published in the Federal Register on March devices. 30, 2012, and will generally become effective 30 days later, on April 30, 2012. The iPhone, iPod, and iPad are very common players for portable video and music media. The Apple devices The IP closed captioning rules apply to non-exempt full- support TV-style closed captioning in H.264 video length programming and will be implemented according files. CPC MacCaption software can encode closed to the following schedule: caption tracks into QuickTime videos with any pixel resolution. • Pre-recorded programming that is not edited for Internet distribution must be captioned if it is shown The closed captions can be extracted from a broadcast on television with captions on or after September tape or file, converted from other caption formats, or even 30, 2012. created from scratch. Simply add the captions track to • Pre-recorded programming that is edited for your existing video files with MacCaption. Internet distribution must be captioned if it is shown on television with captions on or after September Most Android-based phones which support Flash can 30, 2013. take advantage of Flash closed captions. Live and near-live programming must be captioned • YouTube Closed Captioning if it is shown on television with captions on or after It is easier than ever to caption web videos through March 30, 2013. Near-live programming is video YouTube. Not only does YouTube have a speech programming that is performed and recorded less recognition engine to help transcribe your video, but than 24 hours prior to the time it was first shown on also an automatic time stamping tool to synchronize an television. Captioning Products Article already existing script. If you need the transcription to Akamai Sola Sphere Captioning be perfect it is best to type it out manually in a word MacCaption software automatically converts TV closed processor and upload a .txt file alongside your video caption data to web closed caption data, which can to YouTube. This will result in accurate captioning text. then be streamed in HD quality by Akamai. This means However, there are times when you may have a closed that any organization with a large number of archived captioning file or tape that already has captions but captioned video files can reduce captioning operational needs to be converted to a video that can be uploaded time and errors by using batch processing mode to to YouTube. Telestream software can help by quickly convert all the files in a folder to desired web captioning converting your TV closed captioning file or tape to the formats. MacCaption software can also create captions .SRT format that is native to YouTube. from scratch. iTunes Closed Captioning Workflows for Web Closed Captions iTunes software for Mac and Windows now has the ability to display closed captioning for iTunes videos, Preparing your captioned video for the web including video podcasts and iTunes U. All you have to TV broadcast producers now need a way to get their do is add closed captions to a QuickTime .mov or .m4v videos that were closed captioned for broadcast onto file. The closed captioning in these iTunes files are called the web without losing the captions. Telestream software closed caption tracks for QuickTime. MacCaption can can easily handle any situation. It can extract and convert create this CC track quickly and easily by embedding closed captions to any required format. If a frame rate them from any caption document or already captioned or time code change is needed, it has all the necessary video into the QuickTime .mov without re-compression tools to easily adjust the closed caption data. Typically or generation loss. Take existing video podcast archives this also involves editing the video to remove commercial that you are hosting and add closed captions to them breaks or shorten the duration.Telestream’s closed using MacCaption’s batch processing. captioning software can make use of an edit decision list (EDL) from your editing system to automatically conform Flash Closed Captioning the original captions to the new web version. Adobe CS5, Flex, Flow Player, JW Player, Hulu, and Captionate plug-in support closed captioning files for the Consider what your audience is using to view your web. Flash video is like a sea of different custom video captioned video players. There are a variety of caption file formats that If everyone’s computer was the same, then you could Flash video can support. They include .srt, DFXP Timed simply upload your video in one format such as Windows Text .xml, SAMI .smi, Captionate .xml, and embedded Media and sleep well at night knowing that everyone in .FLV with captions.