Modern technology allows you to transform any Smart TV into a powerful multimedia center, streaming content directly from your personal computer. Using a wireless connection Wi-Fi Eliminates the need to run long HDMI cables across the room, keeping the interior aesthetically pleasing and tidy. This data transfer method is becoming the standard for watching movies, photos, and even games on the big screen.
There are several basic protocols and technologies that ensure stable synchronization of devices on a home network. The specific method you choose depends on the operating system of your laptop or PC, as well as the software installed on your TV. In this article, we'll cover all the current methods in detail, from built-in Windows features to third-party utilities for macOS.
Before you begin setup, make sure both devices are connected to the same wireless network. This critically important condition, without which device discovery is impossible, as local traffic simply won't be routed between them. If your router supports dual-band mode, it's recommended to use the 5 GHz network to transmit high-definition video without latency.
Wireless streaming technologies: DLNA, Miracast, and AirPlay
Understanding the differences between the main data transfer protocols will help you choose the optimal use case for your needs. Each technology has its own advantages and limitations, which directly impact image quality and functionality.
DLNA (Digital Living Network Alliance) is a standard that enables the exchange of multimedia content between compatible devices on the network. It's ideal for watching downloaded movies or listening to music, as the TV reads the file from the computer's hard drive but doesn't broadcast the desktop in real time.
Unlike DLNA, the technology Miracast (often referred to as Wi-Fi Direct) creates a direct connection between screens. It allows for the full mirroring of a PC monitor's image to a TV, which is convenient for presentations or demonstrating software interfaces. While transmission quality is higher, it places a greater load on the computer's Wi-Fi module.
Apple users are facing a protocol AirPlay, which ensures high stability and minimal latency. Integrating a Windows PC with Apple TV or AirPlay 2-enabled TVs requires special settings, but the results are worth it.
- 📡 Miracast - Screen mirroring without delays, ideal for demonstrations.
- 🎬 DLNA — streaming files (video, photos, music) with control from the TV remote control.
- 🍏 AirPlay — a proprietary Apple standard with multitouch support and high-bitrate audio.
⚠️ Note: Some older TV models may not support Miracast natively. In this case, you will need to use an external adapter or third-party software.
Preparing equipment and network
Successful synchronization begins long before the streaming settings are set up. The foundation of a stable connection is proper network equipment and proper router configuration. A weak signal can cause artifacts on the screen or even a complete disconnection while watching.
It's recommended to check that your computer's Wi-Fi adapter drivers are updated to the latest version. Manufacturers frequently release patches that improve compatibility with multimedia protocols. On the TV side, you should check for firmware updates in the menu. Settings → Support → Software Update.
If your router is older and only supports the 802.11n standard or earlier, 4K video streaming will be impossible due to insufficient bandwidth. In such cases, it's best to reduce the streaming quality or consider a wired connection.
Setting up screen casting in Windows 10 and 11
Microsoft operating systems come with built-in tools for wirelessly connecting to displays. The "Projection" feature is based on Miracast technology and doesn't require any additional software if the graphics card drivers are installed correctly.
To get started, press the key combination Win + K on the keyboard. The system will automatically search for available wireless displays within range. If your TV isn't visible, make sure the "Screen Casting" app or a similar service is running on it.
After selecting the device, a connection confirmation message may appear on the TV screen. Use the TV remote to grant access to the computer. You can now choose the operating mode: screen mirroring or desktop extension.
☑️ Checking Windows Connection
It's important to note that when extending your desktop, you can drag browser or media player windows to the second screen, turning your TV into an additional monitor. This is convenient for simultaneously working and viewing content.
Using DLNA to play files
If your goal is simply to watch a movie stored on your hard drive, using DLNA is the most energy-efficient solution. In this case, the computer acts as a server, and the TV acts as a client, decoding the video stream.
In Windows, this feature is implemented through "Media Streaming." Go to Control Panel, find the appropriate item, and enable the feature. The system will prompt you to select devices that are allowed to access your libraries.
On your TV, open the "Media," "Gallery," or "Smart View" app (the name varies by brand). Select your computer from the list of sources. The folder structure will be displayed as a tree view, easy to navigate with the remote.
| Parameter | Description | Recommendation |
|---|---|---|
| Video formats | MP4, MKV, AVI | Check TV codec support |
| Audio | MP3, AAC, FLAC | FLAC requires a DAC in the TV |
| Photo | JPG, PNG, RAW | RAW may not be readable |
| Subtitles | SRT, SUB | The file name must match |
Problems with subtitles
If the subtitles are not displayed, rename the subtitle file so that it is exactly the same as the video file name (except for the extension) and place them in the same folder.
Cast from macOS to TV (AirPlay)
Apple computer owners are lucky with ecosystem integration, but connecting to third-party TVs (Samsung, LG, Sony) may require AirPlay 2 support. Modern Smart TV models already have this protocol out of the box.
To start casting, open Control Center in macOS and select Screen Mirroring. Your TV should appear in the list of available devices. When you first connect, you'll need to enter the code displayed on the TV screen.
If your TV doesn't natively support AirPlay, you can use third-party receptor apps that install on the TV itself (if your Tizen or webOS OS allows it) or use Apple TV as an intermediary.
For advanced users, it is possible to launch it via the terminal, although the graphical interface is usually more convenient. The command defaults write com.apple.airplay receiversVisibleOnNetwork -bool YES can help in diagnosing the visibility of devices on the network.
- 🍎 Native support on new Samsung, LG, Sony, and Vizio models.
- 🔄 Possibility of using Apple TV as a bridge for older TVs.
- 🛠 Using utilities like AirServer to emulate a receiver on a PC.
Quality solution and optimization
Even with ideal settings, situations may arise where the image flickers, the audio lags behind the video, or the connection constantly drops. Most often, the problem lies in radio channel congestion or power saving settings.
Try disabling Windows Firewall while testing. Sometimes it blocks incoming connections from the TV, considering them suspicious. It's also worth checking that the network profile isn't set to "Public," as this limits the device's visibility.
If the audio lag becomes unbearable when watching movies, try changing the buffering settings in the player or switching the audio output on the system directly to the TV if it is detected as a playback device.
⚠️ Note: TV menu interfaces and operating systems may differ depending on the firmware version. If you can't find the item you're looking for, please consult the manufacturer's official documentation for your specific model.
Alternative methods and third-party software
When standard tools fail, specialized programs come to the rescue. They often offer more flexible codec and buffering settings, allowing you to stream content even in less-than-ideal network conditions.
The program is popular Plex, which turns your computer into a powerful media server with a beautiful interface. It automatically downloads movie covers and descriptions, creating a Netflix-like library. Installation requires a server on your PC and a client on your TV.
Another option is to use browsers. Many modern Smart TVs have built-in browsers or support Chrome tab casting via the Cast feature. This allows you to stream video from websites that don't directly support DLNA.
Don't forget about the option of using HDMI adapters with Wi-Fi, such as the Google Chromecast or Microsoft Wireless Display Adapter. They connect directly to the TV's port and handle the signal reception, offloading the computer.
Why can't the TV see the computer via Wi-Fi?
Most often, the devices are on different subnets or client isolation is enabled on the router. It's also possible that an antivirus program is blocking the connection. Make sure the network type is "Private" and not "Public."
Can you play games on TV via Wi-Fi?
Yes, but only if you're using Miracast or streaming technology (Steam Link, GeForce Now). Input lag can be noticeable for fast-paced shooters, so it's best to use a cable for competitive gaming.
Does screencasting affect internet speed?
When using Miracast or DLNA within a local network, the internet may not be used at all if the content is stored on a disk. However, if you're streaming online video, the bandwidth is split between broadcasting and buffering, which can reduce quality.
How to improve picture quality over a wireless connection?
Move closer to the router, use the 5 GHz band, close unnecessary applications on your PC that consume data, and make sure the screen resolution matches the native resolution of the TV matrix.
Is internet required for Miracast to work?
No, Miracast technology works directly between devices (Wi-Fi Direct) or through a local router without access to the global network. Internet access is only required if you're streaming online content.