# Virtual Background (/en/realtime-media/broadcast-streaming/build/apply-effects-and-enhancements/virtual-background/windows) > For AI agents: see the complete documentation index at [llms.txt](/llms.txt). Virtual Background enables users to blur their background, or replace it with a solid color or an image. This feature is applicable to use-cases such as online conferences, online classes, and live streaming. It helps protect personal privacy and reduces audience distraction. ## Understand the tech [#understand-the-tech-3] Virtual Background offers the following options: | Feature | Example | | --------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Blurred background and image background | ![image](https://assets-docs.agora.io/images/extensions-marketplace/blurred-background.jpg) | | Video/Animated background | | | Portrait-in-picture | ![portrait-in-picture](https://assets-docs.agora.io/images/extensions-marketplace/portrait-in-picture.jpg) Allows the presenter to use slides as the virtual background while superimposing their video. The effect is similar to a weather news cast on television, preventing interruptions during a layout toggle. | Want to test Virtual Background? Try the online demo. ## Prerequisites [#prerequisites-3] Ensure that you have implemented the [SDK quickstart](../../index) in your project. ## Implement virtual background [#implement-virtual-background-3] This section shows you how to add a virtual background to the local video. ### Check device compatibility [#check-device-compatibility-2] To avoid performance degradation or unavailable features when enabling Virtual Background on low-end devices, check whether the device supports the feature. ```cpp if (!(m_rtcEngine->isFeatureAvailableOnDevice(FeatureType::VIDEO_VIRTUAL_BACKGROUND))) { AfxMessageBox(L"Device doesn't support virtual background"); return; } ``` ### Set a blurred background [#set-a-blurred-background-2] To blur the video background, use the following code: ```cpp void SetBackgroundBlur(VirtualBackgroundSource& virtualBackgroundSource) { VirtualBackgroundSource virtualBackgroundSource; SegmentationProperty segmentationProperty; // Set background blur virtualBackgroundSource.background_source_type = VirtualBackgroundSource:BACKGROUND_BLUR; virtualBackgroundSource.blur_degree = VirtualBackgroundSource::BLUR_DEGREE_HIGH; // Set processing properties for background segmentationProperty.modelType = SegmentationProperty::SEG_MODEL_AI; segmentationProperty.greenCapacity = 0.5F; // Enable or disable virtual background m_rtcEngine->enableVirtualBackground(true, virtualBackgroundSource, segmentationProperty); } ``` ### Set a color background [#set-a-color-background-2] To apply a solid color as the virtual background, use a hexadecimal color code. For example, `0x0000FF` for blue: ```cpp void SetBackgroundColor(VirtualBackgroundSource& virtualBackgroundSource) { VirtualBackgroundSource virtualBackgroundSource; SegmentationProperty segmentationProperty; // Set a solid background color virtualBackgroundSource.background_source_type = VirtualBackgroundSource::BACKGROUND_COLOR; virtualBackgroundSource.color = 0x0000FF; // Set processing properties for background segmentationProperty.modelType = SegmentationProperty::SEG_MODEL_AI; segmentationProperty.greenCapacity = 0.5F; // Enable or disable virtual background m_rtcEngine->enableVirtualBackground(true, virtualBackgroundSource, segmentationProperty); } ``` ### Set an image background [#set-an-image-background-2] To set a custom image as the virtual background, specify the absolute path to the image file. ```cpp void SetBackgroundImage(VirtualBackgroundSource& virtualBackgroundSource) { VirtualBackgroundSource virtualBackgroundSource; SegmentationProperty segmentationProperty; // Set a background image virtualBackgroundSource.background_source_type = VirtualBackgroundSource::BACKGROUND_IMG; virtualBackgroundSource.source = ""; // Set processing properties for background segmentationProperty.modelType = SegmentationProperty::SEG_MODEL_AI; segmentationProperty.greenCapacity = 0.5F; // Enable or disable virtual background m_rtcEngine->enableVirtualBackground(true, virtualBackgroundSource, segmentationProperty); } ``` ### Reset the background [#reset-the-background-2] To disable the virtual background and revert to the original video state, use the following code: ```cpp void ResetVirtualBackground() { // Set a default or reset state for the virtual background VirtualBackgroundSource virtualBackgroundSource; SegmentationProperty segmentationProperty; // For example, setting a default background color virtualBackgroundSource.background_source_type = VirtualBackgroundSource::BACKGROUND_COLOR; virtualBackgroundSource.color = 0xFFFFFF; // Set processing properties for background segmentationProperty.modelType = SegmentationProperty::SEG_MODEL_AI; segmentationProperty.greenCapacity = 0.5F; // Disable virtual background m_rtcEngine->enableVirtualBackground(false, virtualBackgroundSource, segmentationProperty); } ``` ## Reference [#reference-3] This section contains content that completes the information in this page, or points you to documentation that explains other aspects to this product. ### API reference [#api-reference-3] * [`isFeatureAvailableOnDevice`](https://api-ref.agora.io/en/video-sdk/cpp/4.x/API/class_irtcengine.html#api_irtcengine_isfeatureavailableondevice) * [`enableVirtualBackground`](https://api-ref.agora.io/en/video-sdk/cpp/4.x/API/class_irtcengine.html#api_irtcengine_enablevirtualbackground) * [`VirtualBackgroundSource`](https://api-ref.agora.io/en/video-sdk/cpp/4.x/API/class_virtualbackgroundsource.html) * [`SegmentationProperty`](https://api-ref.agora.io/en/video-sdk/cpp/4.x/API/class_segmentationproperty.html)