It's hard to imagine modern home entertainment without large screens. It's common to find an interesting movie or video on your computer, but it's inconvenient to watch on a small laptop monitor. In this case, wireless media streaming technologies come to the rescue, allowing you to display images on a large TV screen without the need for unnecessary wires. To successfully accomplish this, both devices must be connected to a single local network, ensuring stable data exchange.
There are several basic protocols and methods that can solve the problem content broadcastsThe specific method you choose depends on your TV model, computer operating system, and web browser. The most common technologies include built-in Google Chrome, DLNA support, Miracast, and AirPlay. Understanding the differences between them will help you choose the best option for your situation.
In this article, we'll cover step-by-step instructions for various use cases. You'll learn how to configure your equipment, which router settings can affect image quality, and how to avoid common connection errors. Proper network configuration is the key to high image quality and smooth video playback.
Preparing equipment and setting up the network
The first and most important step is to ensure a stable connection between your computer and TV. Both devices must be connected to the same Wi-Fi network. If your router supports two frequency bands (2.4 GHz and 5 GHz), it is highly recommended to connect both devices to the network. 5 GHzThis will provide higher channel throughput, which is critical for transmitting high-definition video streams without buffering.
Make sure the Smart TV function is enabled on your TV or a compatible media player is connected. It's recommended to disable AP Isolation in your router settings if it's enabled. This security feature prevents devices within the local network from communicating with each other, making it impossible for your computer to detect the TV. Also, make sure your Windows firewall or antivirus software isn't blocking local connections.
You can use the operating system's built-in utilities to diagnose signal quality. If the signal is weak, the video stream may be interrupted or the image quality may degrade. In such cases, it is recommended to move the router closer to the viewing area or use a Wi-Fi repeater to boost the signal.
⚠️ Important: If your router is sharing a guest network, devices connected to it are often isolated from the main network. Make sure both your PC and TV are connected to the main network, not the guest network, otherwise they won't be able to see each other.
Broadcasting via Google Chrome browser
The most universal and simple method is to use the built-in casting feature in the Google Chrome browser. This method works on most modern TVs with Chromecast built-in support or Android TV. You won't need to install any additional extensions or programs, as the functionality is already integrated into the browser.
To start playback, open your browser and go to the video site. Click the three dots in the upper right corner of the window to open the menu. Select Broadcast (Cast). The browser will begin searching for available devices on your network. When your TV appears in the list, click it. If you want to cast only the video tab, select "Cast Tab." If you want to cast your entire desktop screen, select "Cast Desktop."
It's important to note that when streaming a browser tab, the load falls on the computer's processor, as it is responsible for encoding the video stream. When streaming directly from a website (when the TV automatically downloads the stream from the link), the load on the PC is minimal. Image quality may vary depending on your processor power and internet speed.
- 📺 Open your browser menu and find the "Broadcast" button.
- 💻 Select source: tab, desktop, or file.
- 📡 Wait until your TV's name appears in the list.
- ▶️ Tap on the device to start syncing.
In some cases, image quality may be lower than expected when casting the entire desktop. This is due to the browser compressing the video stream for transmission over the network. For movies, it's better to use built-in Smart TV apps or the "Cast File" function, if available in the video's context menu.
Using DLNA technology and media servers
Technology DLNA (Digital Living Network Alliance) allows you to stream multimedia content between devices within your home network. Unlike screen mirroring, the TV acts as a renderer, receiving the file directly from the computer. This frees up PC resources and often provides better image quality, as the file is transmitted in its original format without real-time re-encoding.
Windows has built-in DLNA support. To use it, open the folder containing the video file, right-click, and select "Cast to Device." The system will offer a list of available TVs. However, for more flexible control, it's better to use a dedicated media server, such as the one built into Windows Media Player or third-party solutions like Plex or Kodi.
When setting up a media server, it's important to correctly specify the file types that will be available for streaming. It's also worth checking your TV's codec support. If the TV doesn't support the audio or video container format, playback may fail or be silent. In such cases, the media server can perform transcoding on the fly, but this will require significant computing resources.
| Parameter | Tab broadcast (Cast) | DLNA (Media Server) | Miracast (Mirroring) |
|---|---|---|---|
| PC load | High | Low | Average |
| Image quality | Depends on the network | Original | Depends on the signal |
| Control | From a computer | From the TV remote control | From a computer |
| Format support | All (browser) | Depends on TV | All (as on the screen) |
DLNA is ideal for watching pre-downloaded movies and TV shows. You can create a library on your computer and control playback directly from your TV remote, which is very convenient for a home theater system.
☑️ Check DLNA settings
Screen mirroring via Miracast and WiDi
Technology Miracast (often called WiDi on Intel devices) is designed to fully mirror your computer screen to your TV. It works like a wireless HDMI connection. The TV screen becomes a second monitor, broadcasting everything that's happening on your PC desktop, including the mouse cursor, open windows, and system notifications.
In Windows 10 and 11, this feature is built into the system. To connect, press the following key combination: Win + KThe "Connection" panel will appear on the right, where the system will begin searching for wireless displays. Select your TV from the list. A connection confirmation prompt may appear on the TV screen, which you'll need to confirm using your remote.
This method is convenient for sharing presentations, photos, or games that don't support Smart TV. However, keep in mind that Miracast creates a direct WiFi connection (WiFi Direct), which may temporarily reduce your computer's internet speed or cause slight input lag. This method may not be suitable for fast-paced games due to input lag.
⚠️ Note: When using Miracast screen mirroring, the desktop resolution may change to match the native resolution of your TV. Check your display settings in
Settings → System → Display, if the image appears stretched.
If the built-in function does not work, video card manufacturers (NVIDIA, AMD) may offer their own utilities for wireless image transfer, which are also worth trying in case of problems with the standard Windows driver.
Broadcast for macOS and Apple TV owners
Apple ecosystem users have their own protocol called AirPlayIf you have an AirPlay 2-enabled TV (many modern Samsung, LG, and Sony models) or an Apple TV, the connection process is extremely simple. You can easily mirror the image to the big screen using the Safari browser or the macOS system menu.
To stream video from Safari, find the AirPlay icon in the address bar or video controls. On Mac computers, you can use the "Screen Mirroring" feature in Control Center (the icon with two rectangles). Select your TV, and your desktop image will appear on the TV.
The advantage of AirPlay is its high stability and support for high-quality audio, including surround sound if your audio system supports it. The protocol is well optimized and minimizes latency, making viewing comfortable. It's important that Bluetooth and Wi-Fi are enabled on all devices, as Apple devices use Bluetooth for initial handshake and discovery.
- 🍎 Make sure AirPlay support is enabled on your TV in the settings.
- 🔗 Make sure your Mac and TV are on the same Wi-Fi network.
- 🖥 Click the AirPlay icon in your browser or system menu.
- 🔢 Enter the code from the TV screen if required.
In some cases, you may be required to enter a password displayed on your TV screen. This is a security measure to prevent unauthorized access to your screen.
What should I do if AirPlay doesn't detect my TV?
Make sure client isolation isn't enabled on your router. Also, try rebooting your router and TV. Sometimes temporarily disabling the VPN on your computer helps, as it changes the device's virtual location on the network.
Solving buffering and quality issues
Even with proper setup, users may encounter issues: video stutters, the image breaks up into blocks, or the audio lags behind the image. Most often, this is due to a congested Wi-Fi channel or insufficient internet speed. If large files are downloaded simultaneously or other users are watching 4K video, the bandwidth may be exhausted.
Try lowering the playback quality in the video player settings on the website (for example, switch from 1080p to 720p). If the problem resolves, your network bandwidth isn't sufficient for the high bitrate. It's also worth checking if there's a background game or operating system update running on your computer that could be consuming all your bandwidth.
Another possible cause could be an outdated network card or video card driver. Updating drivers to the latest version often resolves compatibility issues and improves video encoding performance. You can try changing the Wi-Fi channel in your router settings to a less congested one using specialized analyzer apps for your smartphone.
If none of these methods help, try rebooting the equipment chain: turn off the router, TV, and computer, then turn them on in the following sequence: router (wait for it to fully boot) -> TV -> PC.
Frequently Asked Questions (FAQ)
Is it possible to stream video if the computer is connected via cable and the TV via Wi-Fi?
Yes, this is possible, but only if both devices are on the same subnet and the router correctly routes traffic between wired (LAN) and wireless (WLAN) clients. Some home routers have LAN and Wi-Fi isolation enabled by default, which must be disabled in the settings.
Why is there no sound on the TV during broadcasting?
Check your operating system's audio output settings. When connecting to a TV via Miracast or Chromecast, you must manually select the audio output device (your TV) in the Windows or macOS volume mixer. Sometimes the browser continues to use your computer's speakers by default.
Does video streaming affect internet speed?
Yes, streaming takes up some bandwidth. When watching online video, the traffic goes from the website to your PC, and then from the PC to the TV (when mirroring), doubling the bandwidth. When using DLNA or a direct link (Cast), the traffic goes only once, but it consumes WiFi bandwidth.
How to stream video from Firefox or Edge browser?
In Microsoft Edge, the feature is built in similarly to Chrome (the button with three dots). In Firefox, full casting may require installing an add-on or using the "Project to second screen" system feature via the Windows action bar.