A self-service multilingual streaming platform

Clevercast makes it easy to deliver multilingual live streaming to global audiences. Its live management dashboard allows you to broadcast, translate and stream live video with any number of audio languages.

Traditionally, when broadcasting video with simultaneous interpretation, all translators have to be present at the event location. Their audio streams are sent to Clevercast along with the video stream (as an SRT multi-track or RTMP multi-channel broadcast). Clevercast turns them into a high-quality, global live stream (with the help of Amazon CloudFront). We recommended this method for high-profile media or entertainment events, since it gives you full control over the audio streams (mixing, sound levels …).

With our new Translate at Home (T@H) service, we added support for Remote Simultaneous Interpretation (RSI). Translators can do the simultaneous translation at home, using Clevercast’s RSI interface and a browser that supports WebRTC (preferably Mozilla Firefox). Translate at Home is suited for presentations, conferences… where you don’t need a dynamic audio mix.

Clevercast’s multi language video player allows your viewers to switch to their preferred language while watching the video. The player provides the best possible experience on any device and platform (using adaptive streaming). You can add Clevercast player to your website by just copying its embed code. Alternatively, you can use Clevercast Webinar with multilingual streaming.

For more info, see our Multi-Language Streaming FAQ.

Translate at the Event Location

Traditionally, a multilingual live stream with simultaneous translation is broadcasted with interpreter booths at the event location. In that case, all audio streams are sent along with the video stream. Clevercast supports multiple broadcast protocols that allow you to do this:

» An SRT broadcast with an audio track for each language. The SRT protocol is reliable for broadcasts over very long distances and may contain multiple audio tracks. Clevercast lets you send an SRT broadcast with multiple audio tracks and turns it into a multilingual livestream. Various SRT encoders can be used  (eg. Haivision’s Makito XIntinor, OBS Studio).

» A multi-channel RTMP stream with an audio channel for each language. OBS Studio, the free and cross-platform streaming software, is capable of broadcasting video with surround sound audio streams. Clevercast lets you use this feature for multi-language streaming. Just send an RTMP broadcast with an audio channel for each language.

» A separate RTMP stream per language. If you only need two or three languages and have sufficient outgoing bandwidth, you may decide to go for a setup with multiple RTMP broadcasters sending a regular RTMP stream (video+audio stream) for each language.

Translate at Home (T@H)

In COVID-19 times, it may not be possible for all interpreters to be present at the broadcast location. Clevercast’s new Translate at Home (T@H) functionality allows translators to provide remote simultaneous interpretation from their own home using only a webbrowser.

It works like this:

» From the event location, a regular SRT or RTMP broadcast is sent to Clevercast. This contains the video stream and the single (original) audio stream (= floor language).

» Clevercast lets you add languages by providing an interface for Remote Simultaneous Interpretation (RSI). It allows interpreters to see and hear the incoming livestream, connect their microphone and start translating in realtime. Multiple translators can use the same language room. With T@H, the number of languages is unlimited.

» Clevercast merges the translated audio streams with the broadcasted video and audio. The result is a multilingual live stream that can be watched globally on every device or platform via Clevercast player.

Fragment from Sintel by the Blender Foundation. Press the headset menu to change the language.

Multilingual broadcasts with OBS Studio

OBS Studio can broadcast a video stream with multiple audio channels over RTMP or with multiple audio tracks over SRT. This way, you can add many audio streams to your broadcast without having to include additional video streams.

Clevercast receives the broadcast and automatically transmits it as a global live stream using our CDN and Amazon CloudFront. You can use the Clevercast dashboard to configure your live broadcast, monitor the live stream(s), see realtime statistics and much more.

Clevercast player can be easily embedded on your site. Just copy-paste the embed code from Clevercast and provide your viewers with the best possible experience on any device, in their own language.

How to Translate at Home?

Translate at Home allows remote simultaneous interpretation for any number of languages. It requires no expensive equipment or advanced knowledge. You can broadcast the live stream with OBS StudioWirecastvMix or any other encoder. You can even re-stream your Zoom meeting.

Interpreters only need a fast, wired internet connection and a headset with noise cancelling. You send them a secure link to their language room in Clevercast. They use it to watch the live stream, translate in realtime and communicate with each other via their browser (preferably Mozilla Firefox). Several translators can alternate for the same language.

For more info, see the T@H overview page, our guide for translators and instructions for broadcasters and our general broadcasting guidelines. The number of languages you can add depends on your Clevercast plan.

US Chamber of Commerce – International Events and Congresses


Still – Press Conferences with realtime translation in 4 languages


Zinzino – Hybrid Conference with RSI to 12 languages


EU Conference with 9 languages

multilingual-live-streams multilingual-livestream

Caterpillar – Live Events with realtime translation


SPAR – Live Marketing Events with realtime translation


SIAC – Virtual Conference of the Inter-American Society of Cardiology


Live Medical Congress from Chile using T@H


8 Multilingual Marketing Webinars for Davines


mindandvision GmbH – T@H with Einfache Sprache


Sar-El Group – 7 day conferences in 12 languages


Europalco – Multilingual Live Events

multilingual-live-streams translate-at-home

Avivox – Multilingual Live Events


Neolife Multilingual Webinar with T@H

multilingual-live-streams multilingual-livestream translate-at-home

DPG Media – Multilingual Press Conferences


Schwarzkopf – Multilingual Workshop

multilingual-live-streams multilingual-livestream

Amway – Platinum Meeting

multilingual-live-streams translate-at-home

Stauff – multilingual company communication

multilingual-live-streams translate-at-home

On Air Multimedia – weekly multilingual streams


Learnence – multilingual live events


Approved by clients, interpreters and viewers

Our clients not only get a multilingual streaming solution, but also the necessary support. Upon request, we can provide remote event supervision or a custom setup.

Based on their feedback, we continue to develop T@H into an easy-to-use tool that allows interpreters to get the best out of themselves.

Clevercast Player provides viewers, anywhere in the world, with the best possible video and audio quality in their preferred language.


Live stream manager
Our live stream dashboard allows you to configure and control all aspects of your live stream. It lets you select your languages, preview the broadcast, get info about stream quality, show a pancarte before and after the live stream…

Company branded multilingual video player
Our responsive HTML5 player can be styled as desired. It supports video advertising, advanced styling (CSS) and custom behaviour (buffering, pre-loading).

Easy embedding
The embed code for every live stream can be copy/pasted to any website(s). Works on any modern device and platform.

Limit stream accessibility
You can determine who can watch your live stream by configuring white and blacklists for countries, domains and IP addresses.

Detailed analytics
Our realtime dashboard informs you how many viewers are watching and from which country. Our analytics dashboard provides more detailed insights into the behaviour of your viewers.

Realtime adaptive transcoding
Clevercast automatically transcodes your incoming broadcasts into multiple resolutions for adaptive streaming, including HD.

Priority support
Get a support plan according to your needs with faster response times, uptime service level agreements or even a dedicated support engineer for live stream monitoring.

Frequently Asked Questions

Do I need a special encoder or broadcasting software?
No. OBS Studio is free and reliable open-source software. It supports the RTMP and SRT broadcast protocols.

How many languages are possible?

How many concurrent viewers can watch the live stream?
20.000 concurrent viewers or more is possible (we use Amazon CloudFront for worldwide delivery)

Do my viewers need to install any software or browser plugins?
No. Clevercast player is an HTML5 player that works out of the box, in any modern browser and on any device (tablet, smartphone).

Can I limit access to registered viewers and let them interact via Q&A and text chat?
Yes. Clevercast Webinar also supports multilingual live streams.

Can Clevercast record the multilingual live stream?
Yes, we support server-side recording and conversion to video on-demand.

Do you also provide interpreters?
Currently not, but if you use T@H we can put you in touch with a translation agency (if desired).

More questions?
See our multilingual streaming FAQ and the T@H solution overview.

Want to try it yourself?

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