How to broadcast video from two web cameras simultaneously in TrueConf client application

Vladislav Panzhar
January 17, 2020
Vladislav Panzhar
Categories: Knowledge Base

TrueConf users can share different content during video calls and conferences. However, it may not always be enough to show slides or share screen during a meeting. At some point you might need to broadcast video from two cameras at the same time. This article describes how to accomplish this scenario in different ways.

Solution #1. Run a copy of the TrueConf client application

We’ve previously described how to run multiple instances of TrueConf client application in our blog. Thanks to this feature, you can broadcast multi-camera video by entering the meeting from two TrueConf client application instances.

You will require one more TrueConf user account to sign in to the second instance of TrueConf client application.
  1. Run TrueConf client application and sign in.
  2. Create an additional shortcut of the client application and rename it afterwards.
  3. Open Properties of the created shortcut.
  4. Enter the -t launch parameter in the Target field after quotes.
  5. Apply changes and press OK.
  6. Run the second instance of the client application and sign in with a different account.

To apply changes in the Target field, you may need administrator’s rights.

  1. Proceed to Settings → Hardware and choose another camera in Video section.
Please note that you can use the second instance of the client application as an additional video source only for group video conferences. If you need to transmit two video streams in a video call, please use the next method.

Solution #2. Use OBS Studio

OBS (Open Broadcaster Software) is a free software for recording and streaming video. One of its main benefits is an ability to create a new video device where you can mix multiple video streams. To use this solution, you will need:

  • OBS Studio for mixing video streams.
  • OBS-VirtualCam extension for creating a virtual camera, which will be chosen as video source in TrueConf client application.

Installing OBS Studio

  1. Download OBS Studio and OBS-VirtualCam
  2. Launch the installation of OBS Studio as an administrator.
  3. During installation, you need to set the following parameters:
    • installation path
    • additional plugins
  4. Install OBS-VirtualCam with the default parameters.
  5. Restart the computer to apply changes.

Setting up the OBS Studio

  1. Launch OBS Studio.
  2. Create a new scene to put video streams in.


  1. Press Add → Video Capture Device.


  1. Choose Create new and set its name.


  1. Choose the required camera in Device bar and press OK.


  1. Repeat steps 1-5 for choosing another camera.

Afterwards, you can adjust the display of the video streams as you need by changing the size and the position of video windows.

Starting the OBS-VirtualCam

  1. To launch the virtual camera, choose Tools → VirtualCam on the toolbar on the top of the application window.


  1. In the pop-up window, select the target camera (OBS-Camera by default) and click Start.
  2. Launch TrueConf client application.
  3. Proceed to Settings → Hardware and choose OBS-Camera in the Video section.

All set!

You can broadcast mixed video stream when you make a video call or video conference.


The flexibility of OBS Studio settings will allow you to change the proportions of the video streams used in real time or switch the prepared OBS Studio mixing schemes via Alt+1, Alt+2, etc. which can be useful for organizing webinars.

Still have questions? Please contact our support team directly via online chat.

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