Modern technology allows you to get rid of unnecessary wires and enjoy content on a big screen without the complicated connection of HDMI cables. Wireless data transmission has become the standard, and most users want to display movies or photos from their laptop directly on their Smart TV. This is not only convenient but also significantly expands the multimedia capabilities of their home entertainment system.
To successfully synchronize devices, both the computer and the TV must be on the same local network. Router In this case, it acts as the main intermediary, distributing traffic between devices. If you're using a laptop, make sure it's connected to Wi-Fi and not to mobile data via a 4G modem; otherwise, the devices simply won't "see" each other.
There are several main streaming protocols, each with its own unique features. The method you choose depends on your PC's operating system, your TV's firmware version, and the file format you plan to play. In this article, we'll cover all the current methods in detail so you can choose the most suitable one for your situation.
The key condition for all the described methods is that both devices are in the same subnet (the same gateway IP address). Without this step, no settings will help, as the physical connection will be lost. Check this first if you're experiencing detection issues.
Using built-in Windows tools and the Broadcast function
Windows 10 and 11 operating systems have a built-in tool for wireless display. This feature is based on the standard Miracast, which allows you to mirror or extend your screen onto your TV. You don't need to install third-party software if both devices support this technology, which is true for most modern Smart TVs.
To start casting, open the notification menu in the lower right corner of the screen and select "Project." The system will begin searching for available displays. If your TV is turned on and connected to the network, it will appear in the list. After selecting a device, a connection confirmation prompt may appear on the TV screen. Accept this prompt with your remote.
- 📺 Open the projection control panel with a keyboard shortcut
Win + Kfor quick access. - 🔌 Make sure Screen Mirroring or Anyview Cast is activated on your TV.
- 🔄 Select the operating mode: "Duplicate" for a copy of the screen or "Extend" for a second monitor.
⚠️ Attention: When using Miracast, there may be some image lag, which makes this method unsuitable for fast-paced games, but quite acceptable for watching videos or presentations.
Transmission quality depends on the wireless channel load. If your router operates at 2.4 GHz and there are many neighboring networks nearby, the picture may lag. Switching to a different band 5 GHz will significantly improve the stability of the connection and increase the bitrate of the transmitted video stream.
DLNA technology: playing files via a media server
If your goal is not screen duplication, but rather playback of a video file stored on your hard drive, then the technology DLNA This is ideal. It allows the TV to view your computer's folders as network storage. Windows can create such servers automatically through the standard Settings or Media Player apps.
To configure this, go to Settings -> Network & Internet -> Status -> Sharing Options. Here, you'll need to enable network discovery and file sharing. Then, right-click the video file folder, select "Show devices," and select your TV from the list.
☑️ Check DLNA settings
Most modern TVs have a built-in decoder, but it may not support all formats. If the file doesn't open, the problem may be codecIn this case, it's convenient to use third-party server programs like Plex or Kodi, which stream and convert the stream on the fly if the TV can't read the original format.
| Parameter | Description | Recommendation |
|---|---|---|
| Protocol | DLNA / UPnP | Standard for Smart TV |
| Formats | MP4, MKV, AVI | Depends on TV codecs |
| Quality | Up to 4K HDR | Requires a strong Wi-Fi connection |
| Control | From the TV remote control | The PC acts as a server |
Using third-party media servers gives you more flexibility in interface customization and library organization. You can add covers, descriptions, and sort your collections, turning a regular hard drive into a fully-fledged online cinema accessible over your local network.
Broadcasting via Google Chrome browser (Chromecast)
If your TV doesn't have built-in Miracast support but has an HDMI port, you can use the device Chromecast or TVs with built-in function Google CastTo stream video from your computer, simply use the Google Chrome browser, which has a built-in feature for casting tabs or the entire desktop.
Open your browser, click the three dots in the upper-right corner, and select "Cast." You'll be prompted to select a source: the current tab, the entire screen, or a specific file. This method is convenient because it's cross-platform and doesn't depend on your Windows version, even on Linux and macOS.
- 🌐 Open your browser menu and find "Save and Share" -> "Broadcast".
- 🖥️ Select the signal source: a tab, a file, or the entire desktop.
- 📺 Confirm the connection on the TV screen if required.
⚠️ Attention: Streaming an entire browser tab can consume significant CPU resources. If the video is lagging, try lowering the playback quality in your YouTube or Netflix settings.
The advantage of this method is the ability to stream content protected by direct copy management (DRM), as it transmits a video stream rather than a file. However, the compression quality when streaming a tab may be lower than with a direct cable connection or using DLNA for local files.
Why is there only sound but no image?
This is a common issue when trying to stream protected content (such as Netflix) using the "Cast Tab" feature. In such cases, DRM protection prevents the browser from capturing the video stream. Solution: Use the built-in Netflix app on your Smart TV or the "Cast Desktop" feature, although the quality may be lower.
Specialized software from TV manufacturers
Large electronics manufacturers often develop their own ecosystems to simplify interaction between devices. For example, equipment owners Samsung can use the Smart View app, and users LG — LG TV Plus. These utilities often provide a more stable connection and additional control features.
The software is installed on your computer and automatically scans the network for compatible TVs. The interface of such programs is usually intuitive: you simply drag and drop the file into the application window or select it using the built-in file manager. This eliminates the need to delve into Windows system settings.
These apps often allow you to not only stream video, but also control your TV from your keyboard, use your PC keyboard to enter text in search results on your TV, and even stream audio from your computer to your TV's sound system, which can be useful for older models with poor speakers.
It's important to keep this software up-to-date. Manufacturers regularly release patches that improve connection stability and add support for new video formats. Older versions of the software may not work correctly with new TV models or Windows updates.
Solving buffering and image quality issues
Even with proper settings, users may experience playback interruptions. This is most often due to an unstable Wi-Fi signal. Interference from microwave ovens, neighbors' routers, or even aquariums can seriously reduce data transfer speeds.
Try moving your router closer to the viewing area or using a Wi-Fi repeater if the signal is weak. Another effective solution is to use a wired connection for your desktop computer or TV, reserving Wi-Fi only for mobile devices. This will reduce airtime congestion and increase bandwidth.
- 📡 Check Wi-Fi channel load using dedicated apps on your smartphone.
- 🔌 Disconnect devices that are actively downloading files (torrents, Steam downloads) from the network.
- ⚙️ Reduce the video bitrate in the player settings if your network can't handle it.
If you're using DLNA and the video is constantly buffering, the issue may be related to your hard drive's read speed. If the drive is old or fragmented, it may not be able to handle high-definition streaming. Defragmenting the drive or using an SSD can solve this problem.
Frequently Asked Questions (FAQ)
Why can't the TV see the computer on the network?
Make sure your computer's network settings are set to "Private Network" and not "Public." Windows blocks device discovery in the Public profile for security reasons. Also, check if your antivirus software is blocking the connection.
Is it possible to stream video from Mac to Windows TV?
Yes, the best way to do this is to use media server apps like Plex, which have versions for macOS and support the DLNA protocol, which most TVs understand.
Does internet speed affect video streaming over Wi-Fi?
No, when transferring files within your home network (locally), the speed of your external ISP connection is irrelevant. The speed depends solely on your router, your distance from it, and the power of your devices' Wi-Fi adapters.
How to improve audio quality when broadcasting?
If your TV's built-in speakers aren't working properly, check your Windows sound settings. You can select "TV speakers" as the sound output device or connect an external speaker system directly to your PC or TV via Bluetooth/Optical.
Does my TV support 4K over Wi-Fi?
Lossless 4K content transmission requires a very stable 802.11ac (Wi-Fi 5) or 802.11ax (Wi-Fi 6) connection at 5 GHz. On older 2.4 GHz routers, 4K video will constantly stutter.