Creating professional video content using a smartphone has long ceased to be the prerogative of flagship models. The blurred background effect, which photographers call bokeh, gives the frame a cinematic feel and allows the viewer to focus on the main subject of the photo. Owners of devices based on Android have several tools to implement this task, ranging from camera hardware capabilities to powerful artificial intelligence algorithms in third-party applications.
Previously, expensive optics with a wide aperture were required to obtain high-quality blur, but modern mobile processors are able to simulate this effect in real life. time. However, there is no universal solution: the methods vary dramatically depending on the model of your gadget and the version of the operating system. In this article, we will look in detail at how to activate Portrait mode for video, which applications work best with post-processing and how to avoid common mistakes when shooting.
Using the built-in portrait mode of the camera
Most modern smartphones in the middle and high price segment are equipped with a special shooting mode that programmatically separates the subject from the background. To find this function, launch the standard application Camera and look for a tab with the name Portrait or an icon resembling a silhouette of a person. In some shells, such as One UI from Samsung or MIUI from Xiaomi, this option may be hidden inside the video settings menu.
Activating the mode often requires switching between photo and video. Click on the video camera icon, and then select the option Portrait video or Live Focus. Once turned on, you will see a slider on the screen that adjusts the intensity of the blur. Move it to achieve the desired level depth of field.
Not all devices support 4K recording with active bokeh due to the high CPU load. If you notice strong delays or artifacts around the subject, try lowering the resolution to 1080p in the quality settings. Also make sure that the lighting is sufficient: in the dark, the system may incorrectly determine the boundaries of the object, creating “dirty” edges.
⚠️ Attention: On budget smartphone models with one camera, software blur may work unstable. If an object is moving quickly, the background may "appear" through it. In such cases, it is better to use a static camera or switch to post-processing methods.
For the best results in portrait mode, use external lighting directed at the subject - this will improve contrast and help the algorithms more accurately separate the figure from the background.
Video post-processing in mobile video editors
If your camera does not support background blur when recording, the situation can be easily corrected at the editing stage. Stores Google Play offer dozens of applications that use neural networks to analyze frames and create a depth map. The leaders in this niche are CapCut, KineMaster and InShot. These tools allow you to apply a blur effect even to a video shot several months ago.
Let's consider the process using the example of a popular editor CapCut. After importing the clip into your project, go to the effects menu and look for the Lens or Blur category. Select an effect Portrait blur. The app will automatically analyze the video and apply a mask to the background. You can adjust the strength of the effect and its duration on the timeline.
More advanced users can use the Chroma Key function or manual masking if the automatic detection did not work well. This takes more time, but gives you complete control over exactly which areas of the frame you want to remain sharp. It is better to export the finished file in the format H.264 for maximum compatibility with social networks.
- 🎬 CapCut - a free editor with excellent automatic object detection and a huge library of effects.
- 🎨 KineMaster - a professional tool with support for multi-layering and precise manual adjustment of the mask.
- 📱 InShot - a simple application for fast processing, ideal for stories and short videos.
Adjusting depth of field through third-party cameras
Standard camera applications often limit access to manual focus settings during video recording. To bypass these restrictions, you can install third-party software such as Open Camera or Footej Camera 2. These apps provide direct access to the camera API Android, allowing you to control parameters that are hidden in the stock interface.
In the application Open Camera you need to go to the settings (gear icon) and find the section Video settings. Here you should activate the option Lock focus or select manual focus mode if your device supports the protocol Camera2 API. Locking the focus on the subject will prevent the background from "breathing" when the camera tries to refocus on the background.
It is worth noting that software blur is often absent in third-party cameras, since they rely on "honest" optics. However, by combining manual focusing with a wide open aperture (if adjustable) and getting closer to the subject, you can achieve natural optical bokeh without the participation of artificial intelligence.
Open Camera settings -> Video settings -> Focus -> Manual (or Lock)⚠️ Attention: Interfaces of third-party cameras may vary depending on the version Android and drivers for a specific device. If the manual focus function is inactive (grayed), it means that the manufacturer of your smartphone has blocked access to these settings at the system level.
Why do some phones not have portrait video?
The lack of a mode is often due to a lack of processing power of the processor or the absence of a second camera module (telephoto lens or sensor depth) necessary to construct a distance map.
Comparison of methods for creating the bokeh effect
The choice of a method for creating a blurred background depends on your goals and the technical capabilities of the device. Hardware solutions provide better real-time performance, but require specific hardware. Software methods are more versatile, but can consume a lot of battery resources when rendering.
For clarity, we have compiled a table comparing the main characteristics of different approaches. This will help you quickly navigate and choose the best option for your situation.
| Method | Result quality | Setting complexity | Device requirements |
|---|---|---|---|
| Built-in mode | High (optimized) | Low | Availability of mode in firmware |
| Applications (CapCut) | Medium/High | Medium | Any smartphone with Android 8+ |
| Third-party cameras | Natural (optics) | High | Camera2 support API |
| Manual mask | Professional | Very high | Powerful processor and time |
Please note that the quality of processing in applications is constantly improving due to updating neural network models. What worked poorly a year ago can today produce results that are indistinguishable from the built-in functions of flagships.
For quick publication on social networks, it is better to use the built-in mode or CapCut, while for artistic projects it is worth spending time on manual masking in professional editors.
Typical errors and artifacts when blurring
Even the most advanced algorithms are not perfect. The most common problem is "halos" or glowing outlines around an object, especially if it has a complex shape, such as flowing hair or glasses. This occurs due to an error in constructing a depth map, when the app cannot accurately determine the boundary between the foreground and background.
Another common error is the unnatural behavior of the background when the camera moves. If you turn your smartphone sharply, the blur may “lag” or be applied to objects that should be in focus. To minimize this risk, try to shoot with smooth movements or use a stabilizer (gimbal).
- 🚫 Avoid shooting through transparent objects (glass, mesh), algorithms often mistake them for the background.
- 🚫 Do not use the mode in low light - matrix noise confuses the neural network.
- 🚫 Watch the clothing: if the color of the clothing blends into the background, the object may partially “dissolve” in the blur.
Sometimes a simple change of perspective helps. Try shooting your subject slightly from above or below to increase the contrast between it and its surroundings. This will make things easier for the software.
⚠️ Attention: Operating system updates Android may change how the camera algorithms work. If, after updating your phone, the quality of portrait video has deteriorated, try clearing the camera application cache or resetting its settings to factory settings.
Frequently asked questions (FAQ)
Is it possible to blur the background on a video after shooting without losing quality?
Yes, modern applications use high-quality codecs. However, repeated saving and re-saving of video (recoding) can lead to gradual degradation of the picture. It is best to work with the source file and export the result once in a high bitrate.
Why is there no "Portrait Video" button on my phone?
Most likely, the manufacturer did not include this function in the firmware of your model due to processor limitations or the lack of a second camera module. Try installing a third-party application from Google Playthat emulates this effect programmatically.
Does background blur affect battery consumption?
Significantly. Real-time video processing using neural networks creates a high load on the CPU and GPU. Expect the battery to drain 20-30% faster than usual when actively shooting in portrait mode.
Is it possible to adjust the blur strength after recording the video?
Only if the video was shot in a special format that retains depth data (for example, some models Samsung or Pixel). For regular video files, changing the strength of the effect is only possible through re-processing in a video editor.