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Captions can only be displayed by services that can handle this format and Telestream has little control over how they are displayed. During the event, Wirecast Web Services transcribes the audio, inserts the text into the RTMP stream as CEA-608 formatted captions, and sends the stream off to the service. If your presentation has multiple audio inputs, you can designate which to caption. To enable Live Captions in Wirecast, you select the Restream and Captions checkbox in the Output Setting dialog and then Configure to enable/disable captions ( Figure 1). Workflows like this are cumbersome and expensive and therefore used only when absolutely necessary.
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Until very recently, you had to send an audio stream of your event to a human captioner who typed the captions on a stenographic keyboard, where they were then translated to full text, formatted as captions, and merged into the live stream. While captioning for VOD is now relatively straightforward, live captioning has always been a complex operation. Though few casual broadcasters are legally required to caption at this point, captions are obviously highly desirable when broadcasting to deaf and hard-of-hearing people, when broadcasting to loud environments, or to viewers who might be watching with the sound turned off.
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On the other hand, for high-volume live streamers, Restream will likely prove more expensive than third-party products like Switchboard Live which don’t share the current 720p limitation. It was lovely not having to learn a completely new interface to make the function work. Restream worked well in my tests and the usability was excellent.
From there, Telestream offers two packages, $25/month for 500 minutes and $0.05/minute for overages, or $75/month for 2,000 minutes and $0.0375/minute. Telestream charges for Restream on a per-minute/per-service basis, so ten minutes streamed to four services costs you 40 minutes. I asked about latency and learned that this varies by the service, though Restream typically adds between 10-20 seconds of latency. Quality on both sites was good and glass-to-glass latency was reasonable, about 14 seconds for YouTube Live and 27 seconds for Facebook Live. I tested Restream broadcasting to Facebook Live and YouTube Live. Click here to see this image at full size. Using Restream to stream to multiple destinations. More on how this pricing works below.įigure 1. However, you can Restream without captioning, which is important since these are both for-fee services. Note that you must enable Restream to access Live Captions since the speech-to-text operation is performed in the cloud. Clicking the Configure button next to the checkbox lets you enable or disable captions for any or all streams.
Once enabled, Wirecast will encode a single “pool” encode, currently limited to 720p, transmit that to the cloud, and then distribute the streams to the selected services from the cloud. You choose and configure the services as before and select the Restream and Captions checkbox ( Figure 1). With Restream, you transmit a single stream into the cloud and direct that to multiple destinations, much like services like Switchboard Live.
In previous versions of Wirecast, you could transmit to multiple services, but you needed sufficient processing power to encode a stream for each destination and the outbound bandwidth necessary for all streams. In version 10, Telestream debuted Wirecast Web Services, a cloud-based service that includes Wirecast Live Captions and Wirecast Restream, which allows you to send a single-input stream to multiple cloud destinations. With versions starting at $695, Wirecast is cheap enough to stream simple webcam and PowerPoint tutorials or instructional videos and powerful enough for sophisticated multiple-camera live productions. I’ll describe these in order of introduction.įor readers unfamiliar with the program, Wirecast is a Windows/Mac live video production program that can input and mix multiple audio and video inputs, add transitions, titles, and other elements, and transmit the output stream to different services and/or store an archived version off to disk.
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Version 11 offered stinger transitions, while version 12 added a new stock media library, audio mixing in Rendezvous, and a QR Code Generator, so you can more easily direct viewers to an external web URL.
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This includes access to live captioning and restreaming to multiple platforms in Wirecast 10, both for-fee services offered with a generous 100-minute free trial. It’s been a while since we looked at Telestream Wirecast, now up to version 12.0, and we were intrigued by some of the key new features in the latest three updates.
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