# Audio and video settings
# Video
In the application window, go to the Settings menu by clicking on the 
button. Next, select the camera in the Video subsection of Audio and Video.
If the Face tracking feature is enabled, the built-in AI module will crop the video so that your face would always remain in the center while the background on both sides would be mostly cut out. The resulting frame will be scaled to fit the available video area. If there are two or more persons in the frame, the video will be adjusted to fit all of them. Your face will be tracked even when you are moving.
Face tracking is available for the cameras with the resolution 1280х720 (720p) or above.
# Document or whiteboard recognition
This feature allows you to highlight and enlarge a specific area in the video from your camera, e.g., a board during online lessons. The highlighted area will be sent in an "expanded view" in the form of a rectangle. In other words, when showing a board during your online class, you can spend less time adjusting the camera directly in front of the board. Even if the board is tilted at an angle, other participants in the conference will see it "straight," as if it were directly in front of the camera.
To enable this feature:
Go to Settings → Video and find the Camera settings section.
Click the
button in the bottom right corner of the camera video:
Mark the area to be recognized by placing the frame points in the selected positions. In this window, you can also rotate (
) or mirror (
) the transmitted image:
Go to the Preview menu by clicking the corresponding button. Adjust the aspect ratio if you need to narrow or stretch the transmitted image:
In this window, there is also the checkbox Remove people from the image. If this box is checked, the neural network will automatically remove all people from the frame.
To complete the configuration of the recognition area, click the Confirm button.
Please note that after clicking the Confirm button, you will no longer be able to return to the previous menu and modify the recognition area. To do it, you will need to start configuring the board area once again.
If necessary, you can change the settings of the selected recognition area by clicking which will open the context menu:
In settings editing mode, one cannot select a different recognition area or flip the image. If you need to configure these settings, click Disable and change required parameters once again.
# Background blurring
TrueConf provides background blurring feature. It is available for any computer that meets the general system requirements and can be used for both one-on-one video calls and group video conferences.
The blurred background feature can be useful in a slew of situations, e.g., if you need to focus on the task at hand during meetings. Even if you don't work remotely, office distractions can be a problem.
This feature is also useful for remote learning since children's rooms may look disorderly due to clutter or very bright posters. Background blurring will help them feel more comfortable during the lesson.
The background blurring feature may be unavailable if your system does not meet the required performance parameters or is overloaded with CPU consuming processes.
To blur the background, take the following steps:
Go to the Settings → Audio and Video → Video section.
Click on the
button. You will immediately see the result in the preview window.
To disable background blurring, click on the 
button.
# Virtual background
If you want to hide your background, you can replace it with a virtual one. To do it, go to the Settings → Audio and Video → Video section and select any of the default images in the Virtual background sub-section.
In addition to using a virtual background, users can also blur their real background. Check the corresponding sub-section for more details.
If none of the default images suits you, it is possible to upload a custom image. In order to do it:
Click on the
button in the Virtual background section.In the file manager of your operating system, select an image (supported formats: .jpg, .png, .svg, .jpeg, .gif, .jpe, .jif, .jfif, .jfi, .bmp, .webp) or video (supported formats: .mp4, .avi, .mov, .webm, .mkv).
If the .gif format is used as a background, only the first frame will be used, but not the entire animation.
The image that has been added will be displayed in the list and you will be able to set it as a virtual background.
When a virtual background has been added, you can change or delete it. In order to do it:
Hover the mouse cursor over the image added to the list of virtual backgrounds.
Click on the
button that will pop up.A context menu will be opened; here you will be able to change the image Change or delete it Delete.
To disable the virtual background, click on the button.
# Audio
To adjust settings for audio devices, go to the Audio subsection of Audio and Video. Here, you will be able to select playback and recording devices and set their volume level. Please note that you will be able to select different devices for notification sounds and conference audio.
Additional settings are available in the Recording device section (below the menu for selecting the microphone):
Echo cancellation
Automatic gain control.
Noise suppression
Enable diagnostics audio dump which may be helpful when sending log files to our technical support.
Audio dump files like other application log files are not deleted automatically, So, if the box Enable diagnostics audio dump is checked, the folder with audio dumps will grow in size in the long term.
These options are automatically enabled, and they are helpful in most cases. However, if you use a recording device with integrated echo cancellation/AGC mechanisms, we recommend disabling these options in the application to avoid conflicts between algorithms.
# Noise cancellation
Starting from the version 8.5 of the client application, you will be able to choose the noise suppression mode.
In earlier versions, noise suppression mode was selected depending on the rating of your device: advanced noise suppression mechanisms were available on high-performance devices, while on less powerful devices, only balanced mode was used to save resources.
To choose one of the modes, check the Noise suppression box, and then select one of the three options in the drop-down menu:
Automatic. If this option is selected, the noise suppression mechanism will be chosen based on the performance level of your device: for relatively powerful devices, the Enhanced noise suppression will be selected, while for less powerful devices, the Standard noise suppression will be used.
Standard. The moderate noise suppression level, suitable for low-performance devices. In this mode, the application can eliminate less intense noises, such as the sound of a passing car or distant barking, or muffle loud noises, like the sound of neighbors doing renovations.
Enhanced. The most effective mode of noise suppression, however, it will put a slightly higher load on the device CPU. In this mode, any noise, such as the sound of a drill, can be suppressed.
# Echo сancellation
To activate echo cancellation, check the corresponding box.
For the echo cancellation algorithm to work properly, you can run an audio test and identify a possible delay. To do this, click Estimate at the bottom of the window.
During the testing, you will hear several audio signals from the selected playback device. When the test is successfully completed, the time of delay will be displayed.
You can run the audio test again by clicking the Restart button, which will replace the Estimate button after the first successful testing.
The Control app with HID device buttons checkbox allows users to control the application with the hardware buttons on a speakerphone or headset.
# Quick audio and video settings
You can also configure video devices in the Contacts section (where the video from your camera is displayed). The settings menu can be found in the lower right corner of your video area.
