Broadcast and present a Live event.
- Ways to broadcast a Live event
- Join the Live Studio
- Add a virtual background to your webcam or video stream
- Encoder stream bit rates
- How do I broadcast using an encoder?
- Live stream bit rates
- Presenter Best Practices
- Share a video during a Live event
- Stream optimization
- Video Bridge
- Video Bridge Guide for Presenters and Guest Admins
- About the video bridge (moderators)
- About presenter webcam layouts
- Change the presenter webcam layout on the video bridge
- Pin presenter webcams on the video bridge
- Video Bridge Events - Speaker Can't Connect
- Video Bridge Integrations - Zoom Room Controls
- Change the event window layout during a live event
- Bypassing Zscaler proxies for improved performance
Ways to broadcast a Live event
We offer multiple ways to broadcast no matter the scale of your event, the venue, or the location of your presenters. When you schedule a Live event, you select how presenters will connect their audio and video to broadcast to the audience. The device or method is the live acquisition source for the event.
Note: This only determines how your presenters connect their audio and video and broadcast to the audience. All webcast events include visual elements such as headshots, slides, overlay videos, and more.
If presenters will speak to the audience but remain off-camera, select Telephone as the acquisition source. If they'll broadcast audio and video, you can use a single webcam, the video bridge for multiple webcams, an encoder, or a video conferencing unit (VCU).
Available options depend on your account settings. Contact your sales representative or Support to request additional broadcasting options.
Broadcast audio only
Select Telephone to broadcast the presenter audio with a telephone connection. Up to 20 presenters can stream their audio from a telephone or VoIP connection. Presenters dial in to the presenter bridge and a backup bridge is included as a backup audio source.
Broadcast audio and video
There are several options for connecting presenters and streaming their audio and video to the audience. They can connect directly using their own webcams or connect to another system or service first and then stream that source into the event.
- Webcam - A single webcam connection. Broadcast one presenter or several presenters using the same webcam. Before the event, you must install a driver on the computer you plan to use on the day of the event that lets the event connect to your webcam. Recommended if the event has only one presenter or one webcam source.
- Video Bridge - For multiple presenter video streams. Allow up to 20 presenters to connect their webcams and broadcast.
- Advanced Video Bridge - Allow presenters to broadcast from a video conferencing system, Skype for Business, or telephone audio.
- VCU (Video Conferencing Unit) - Recommended for conference rooms. Use your own video conferencing unit to provide the video feed for the presentation. Before the event, get the H.323 or SIP address for the VCU and ensure it accepts incoming connections. In the Live Studio, the advanced video bridge uses the address to call out to the VCU and bring it into the event.
- Your Encoder - Use your own RTMP-enabled encoding device to broadcast multiple webcams and microphones from your venue as a single stream.
Join the Live Studio
To moderate or present at a live event, enter the Live Studio and connect your audio or video. The Live Studio has controls for presenting slides, playing videos and other content, managing Q&A, and more.
The way you join the Live Studio depends on whether you have a webcasting account or whether you were invited to be a presenter or assist with Q&A.
Join as a moderator
If you have a webcasting account, sign in to the Webcast Admin portal and in the My Events list, click Edit to open the Live event. On the Event Summary tab, under Run My Event, click Launch Live Studio.
Join as a presenter
If you were invited to present at the event, you should have received an email with login details and a link to the Guest Admin Access site. Click the link and enter your information or credentials to sign in, and then click Live Presenter Studio.
Join as a Q&A manager
If you were invited to manage audience questions at the event, you should have received an email with login details and a link to the Guest Admin Access site. Click the link and enter your information or credentials to sign in, and then click Manage Live Q&A.
Add a virtual background to your webcam or video stream
The Webcast service does not currently offer virtual backgrounds; however, if you're broadcasting a single webcam or multiple webcams (video bridge) during the event, you can add them to your video stream with a third-party virtual webcam app. A virtual webcam app is software that allows you to add virtual backgrounds, filters, and more to your webcam video. After you install it, the virtual webcam displays as a new webcam source that you can select when joining the event.
If you are broadcasting an event with an advanced video bridge (ask your host if you're not sure), you can connect to the event from an online meeting app like Zoom or WebEx that offers virtual backgrounds.
Supported virtual webcam apps include:
Note: Download and test the app in the Live Studio at least 48 hours before the event starts. We do not provide support for third-party applications.
Change your background with a virtual webcam
Before joining the Live event, start the virtual webcam app and set up your virtual background.
Important: You must keep the virtual webcam running during the event for your virtual webcam to display properly.
To connect to the event with a virtual webcam:
- Join the Live Studio.
- In the Live Studio, a notification displays in the top left of the window that requires you to allow the Live Studio to access your computer's camera and microphone. Click Allow to grant permission.
- In the Broadcast Controls panel, click Preview.
- For your Video source, select your virtual webcam and then select the microphone you want to use for the broadcast. Check your webcam preview and audio levels to verify that they work properly
Note: This is only a preview. Your webcam is not visible to the audience or other presenters.
- Click Connect to connect your audio and video to the event. Once you're connected, other presenters can see your webcam.
Note: The connection can take up to two minutes to establish. If your stream fails to connect, click Cancel and then preview and connect it again.
Multiple webcams (video bridge)
To connect to the event with a virtual webcam:
- Join the Live Studio.
- In the Live Studio, click Connect using my webcam.
- Enter your name and click Next.
- For your Camera source, select your virtual webcam and select the Microphone and Audio Output sources you want to use for the broadcast.
- Click Join Bridge.
Change your background with an online meeting app
To connect to the event with a meeting application:
- Before joining the Live event, start your meeting app and set up your virtual background.
- Sign in to the Guest Admin site and click Live Presenter Studio.
- Click Connect using another source and use the SIP or H.323 address to connect to the webcast video bridge from your meeting app.
Encoder stream bit rates
Adaptive Bit Rate (ABR) Encoder Events (Recommended)
You are only required to send one stream (per primary and backup). All streams are transcoded and aligned for soother quality transitions. If the system receives a higher stream than the bit rate listed in the 'Source Encoder Sends' section below, it will automatically transcode down to the bit rate shown in the 'Audience Receives' section. Sending a lower bit rate than those listed is not recommended.
The video player has a widescreen (16:9) aspect ratio with the following size options. Audio and video streams to attendees at the listed bit rates. We recommend using an audio bit rate of 96 kbps, which is included in the total bit rate. See 'System Requirements for encoder broacasts' for additional information.
Source Encoder Sends
|Video Player Size||Recommended Video Bit Rate||Recommended Audio Bit Rate||Total Bit Rate with Recommended Settings|
|480p (854x480)||800 kbps||96 kbps||896 kbps|
|720p (1280x720)||1700 kbps||96 kbps||1796 kbps|
|1080p (1920x1080)||3000 kbps (3mbps)||96 kbps||3096 kbps|
|Video Player Size||Video Bit Rate||Audio Bit Rate||Total Bit Rate|
|Sending 480p (854x480)|
|Low - 270p (480x270)||400 kbps||96 kbps||496 kbps|
|High - 480p (854x480)||800 kbps||96 kbps||896 kbps|
|Sending 720p (1280x720)|
|Low - 270p (480x270)||400 kbps||96 kbps||496 kbps|
|Medium - 480p (854x480)||800 kbps||96 kbps||896 kbps|
|High - 720p (1280x720)||1700 kbps||96 kbps||1796 kbps|
|Sending 1080p (1920x1080)|
|Low - 480p (854x480)||800 kbps||96 kbps||896 kbps|
|Medium - 720p (1280x720)||1700 kbps||96 kbps||1796 kbps|
|High - 1080p (1920x1080)||3000 kbps (3mbps)||96 kbps||3096 kbps|
Constant Bit Rate (CBR) Encoder Events
You are only required to send one stream (per primary and backup). All streams are distributed at the bit rate set at the encoder. Listed below are the system-recommended settings for each player size.
Important: Streams that exceed 6 mbps (6,000 kbps) will have their connection terminated by the system. Please note that this includes both the audio and video bitrates together.
The video player has a widescreen (16:9) aspect ration with the following layout options. Audio and video streams to attendees at the provided bit rates. We recommend using an audio bit rate of 96 kbps, which is included in the total bit rate.
See 'System Requirements for encoder broacasts' for additional information.
|Video Player Size||Total Bit Rate|
|480p (854x480)||896 kbps|
|720p (1280x720)||1796 kbps|
|1080p (1920x1080)||3096 kbps|
The system will automatically transcode to the settings above for the on-demand archive, regardless of live bit rates used. With CBR events, you have the option to modify the streaming rate for a higher or lower live bit rate.
How do I broadcast using an encoder?
To access the information needed to connect your encoder for the event, click the Media Encoder Settings button in the Broadcast Controls area of the Live Studio. Your encoding device (e.g. Wirecast) will need to be set up to send an RTMP stream for broadcast.
Click Media Encoder Settings to access the stream path(s), codec information and recommended stream settings.
Copy and paste the Primary Stream URL from the Encoder Settings to your encoding device settings. Then, copy and paste the Primary Stream ID into the stream setting of your encoder. Next, confirm that your encoding device is using the same settings as listed in the Encoder Settings. NOTE: Bit rate can be adjusted based on your requirements.
To add a redundant backup stream on the event, copy and paste the Backup Stream URL from the Encoder Settings to the secondary encoding device settings. Then, copy and paste the Backup Stream ID into the stream setting of your encoder. Next, confirm that your secondary encoding device is using the same settings as listed in the Encoder Settings. NOTE: Bit rate can be adjusted based on your requirements.
Start your encoder to begin streaming to the Webcast Server. Connected text will appear in the Primary Stream and/or Backup Stream boxes when a stream has been connected. Once your encoder confirms a successful connection, click the Preview Stream button to view the stream(s).
If you would like to preview the video stream(s) at full resolution, click Launch Full-size Preview to view the stream at full resolution.
The Primary Stream preview will load by default in the full-size preview window. Use the Source dropdown above to test the Backup and Audio Stream if applicable.
Once the connection process is complete and you see your video in the Live Studio, click Start Webcast to begin broadcasting your event.
To switch between the primary and backup streams during an event, click on the Primary Stream or Backup Stream box. The stream name highlighted in blue along the left will appear in the Broadcast Controls window and is active on the presentation.
Live stream bit rates
Presenter Video, Screen Share (video bridge), and Inline Videos
If you're broadcasting telephone audio only, the video player contains a 320 x 240 pixel space for headshots to be displayed and uses a 96 kbps stream.
If you're broadcasting audio and video, the video player has a widescreen (16:9) aspect ratio with the following layout options and streams to attendees at the listed bit rates. The audio bit rate is always 96 kbps and is included in the total bit rate.
480p (854 x 480)
- Webcam: 896 kbps (High) OR 296 kbps (Low)
- 896 kbps / 496 kbps (Adaptive Bit Rate)
- 896 kbps (Constant Bit Rate)
- VCU: 896 kbps / 496 kbps (Adaptive Bit Rate)
- Video Bridge: 896 kbps / 496 kbps (Adaptive Bit Rate)
720p (1280 x 720)
- Webcam: 1796 kbps (High) OR 296 kbps (Low)
- 1796 kbps / 896 kpbs / 496 kbps (Adaptive Bit Rate)
- 1796 kbps (Constant Bit Rate)
- VCU: 1796 kbps / 896 kpbs / 496 kbps (Adaptive Bit Rate)
- Video Bridge: 1796 kbps / 896 kpbs / 496 kbps (Adaptive Bit Rate)
1080p (1920 x 1080)*
- Webcam: 3096 kbps (High) OR 296 kbps (Low)
- 3096 kbps / 1796 kbps / 896 kpbs / 496 kbps (Adaptive Bit Rate)
- 3096 kbps (Constant Bit Rate)
- VCU: 3096 kbps / 1796 kbps / 896 kpbs / 496 kbps (Adaptive Bit Rate)
- Video Bridge: 3096 kbps / 1796 kbps / 896 kpbs / 496 kbps (Adaptive Bit Rate)
*Note: 1080p and 720p access may not be available on all accounts. Please contact Support with questions.
The bit rate of overlay videos depends on the bit rate of the video when you uploaded it. If you uploaded a video:
- Below 800 kbps, the video will be transcoded at 800 kbps
- Between 800 to 1700 kbps, the video will be transcoded at the uploaded bit rate
- Over 1700 kbps, the video will be transcoded to 1700 kbps
Presenter Best Practices
Below are a list of best practices for presenters:
What should a presenter have available for the presentation?
It is recommended that all speakers prepare the following:
- For audio events, a telephone with a quality headset or handset for EACH presenter/presentation room.
- Speakerphones have poor sound quality and tend to pick up background noise. If you must use a speakerphone try putting something padding under the phone (things around the office such as legal pads or newspapers will do the trick) and make sure the phone is away from computer fans, projectors, and air conditioning units.
- Cellphones and cordless/wireless headsets or phones of any kind should be avoided as they are subject to disconnection and interference.
- For video events, an speaker that will be on video should have an internal or USB webcam.
- A quality headset is recommended as the audio source on video events. A webcam's internal microphone will work, but a headset will produce higher quality audio.
- A hard copy printout of your slides.
- Make sure you print out the same PPT file that has been uploaded. In case your computer or internet connection fails, you can reference your slides while someone else flips the slides for you without any interruption to your recording.
- A wired internet connection.
- Wireless can work, but we do not recommend it as the signal can be subject to drops and interference. Wireless internet should NOT be used for video events or screen sharing.
- It is recommended that you test your system briefly before joining the events pre-call.
- To further improve computer performance, it's recommended to restart your computer shortly before the event and close any unneeded programs or browser tabs.
- Log off of your VPN
- VPNs can reduce your available bandwidth, which is especially important when broadcasting video. We recommend logging off your VPN while presenting.
How can I test my system for presenting?
For any testing, you should use the computer and browser that you intend to present from. Two seemingly identical computers can have very different program and system configurations.
Once you have received the Guest Admin, please log into the webcast Live Studio to test your system.
- Click the thumbnails or the Next Slide button in the slide tool to flip slides. If your computer is working correctly, you should see the slides advance.
- There should be a Presenter Discussion box in the lower left corner of your screen. Type a message into the box provided and click Submit. If your computer is working correctly, you should see your message in the chat log.
If you will be using your webcam or screen sharing on an event, please test your system here: https://event.webcasts.com/test
Please note that if you run into any testing issues, you may be asked to provide a screen capture of the results of this system test.
What if I have issues with the Webcast Live Studio during a live call?
The Live Studio checks the presenter's connection status approximately every three seconds. When the Live Studio detects a sustained connection drop (an approximate 10-15 sec. without a response from our servers), a message is displayed in the Live Studio alerting the presenter:
"Could not connect to the server. Please check your internet connection.(1)".
This message appears in an overlay and the presenter cannot click on any Live Studio elements while their connection is down. Once the connection has been reestablished, the message will disappear automatically and the presenter can resume their Live Studio interaction.
If the Live Studio becomes unresponsive without an internet connection failure:
- The presenter should first attempt to re-launch the Live Studio by closing the Live Studio browser window and clicking the "Launch Live Studio" button on the Guest Presenter page (or the Event Summary page for admins managing their own live events).
- If the presenter is unable to re-establish their internet connection or the Live Studio remains unresponsive after re-launching, the presenter may need to contact their IT team for assistance.
- If the presenter is unable to flip their slides for a sustained period of time, it is recommended to designate an individual (preferably a colleague familiar with the content) to assist with flipping slides for the webcast audience. The presenter should reference slide numbers from their print out copy of the slide deck as they speak to the material.
Share a video during a Live event
In the Live Studio, the Overlay Videos tab shows all uploaded videos. From here, you and other presenters can preview them, play them for the audience, and stop sharing them.
- Before your event goes live, have a least one presenter preview each overlay video. This helps to cache the videos on the event servers (content delivery network or CDN) and provide faster delivery during your event.
- The stream is delayed for attendees, so you must allow the event to run for 15 seconds before sharing a video. This ensures all attendees see the video.
- Once you share a video, you can only share it again the way you played it the first time (overlay or inline). For example, if you shared a video as an overlay, you can't share it in the video player.
- All presenters are automatically muted while previewing and sharing a video.
- You can't share a video and screen share at the same time.
Preview your overlay videos to make sure they display correctly to the audience during the live event. When you preview a video, the video is only visible to you.
To preview an overlay video:
- In the Live Studio, click the Overlay Videos tab.
Thumbnails of the uploaded videos are displayed with the video name, size, and duration.
- Under the video you want to test, click Preview.
The video plays in a new window as an overlay.
Note: The audio is muted when you preview a video. To test the video's audio, click Listen to Presentation Audio.