Modern Smart TVs have transformed the regular television into a multimedia center, but built-in browsers and apps can't always handle playing large files or specific codecs. Often, you need to play a video file already downloaded to your computer's hard drive, but you want to enjoy it on a larger screen. A wireless connection eliminates unnecessary cables and allows you to stream content in minutes.
There are several proven methods image broadcasts: from built-in operating system functions to using specialized DLNA servers. The choice of method depends on your TV model, Windows or macOS version, and desired image quality. In this article, we'll cover all the current options so you can choose the most convenient one for your situation.
Basic requirements for a wireless network
Before you begin setting up, you need to make sure that your local network is ready to handle heavy video streams. Wi-Fi router It must support standards that provide sufficient bandwidth, especially if you plan to watch movies in 4K or HDR. Older devices may not be able to handle the bitrate, resulting in constant buffering.
It's critical that both your computer and TV are connected to the same wireless network. If you have a dual-band router, make sure both devices are on the same band (for example, both on 5 GHz), although modern routers often group networks under a single name.
⚠️ Note: If your router is sharing a guest network, devices on it may be isolated from each other. To stream video, you must disable the "Client Isolation" feature or connect the devices to the main network.
For stable operation, use the standard Wi-Fi 5 (802.11ac) or newer. Old standard 802.11n It may become unstable when transferring large files. Also, check that your router doesn't have speed limits for specific devices.
Casting via Connect to a Wireless Display in Windows
Windows 10 and 11 operating systems have built-in Miracast technology, which allows you to mirror or extend your screen to a TV without installing additional software. This method is ideal for viewing photos, presentations, or videos in a browser, as it broadcasts your entire desktop.
To get started, open the notification center by pressing the key combination Win + A, and select the "Project" button. The system will begin searching for available devices. If the TV is not found, go to the system settings via the menu. Settings → System → Project to this PC and make sure the feature is added.
- 📺 On your TV remote, press the Input/Source button and find "Screen Share", "Miracast" or "Wireless Display".
- 🔗 Select the name of your TV from the list of available devices on your PC.
- 🖥️ Confirm the connection on the TV screen if a permission request appears.
Once successfully connected, the monitor's image will appear on the TV. You can switch to "Second Screen Only" mode to turn off the laptop and watch the movie on the larger display. Image quality in this mode depends on the power of your Wi-Fi adapter and the distance to the router.
Using DLNA servers for streaming
If you need to play a specific file rather than the entire screen, DLNA technology is the best solution. It allows the TV to view media folders on your computer as network storage. Windows has a built-in media server, but third-party programs offer more flexible settings and subtitle support.
The most popular option is to use a player VLC Media Player or a specialized server Universal Media ServerYou can also enable media streaming in Windows settings via the Control Panel: Control Panel → Network and Internet → Network and Sharing Center → Streaming Media Settings.
☑️ Setting up a DLNA server
After activating the server on your TV, a new option will appear in the list of signal sources (Smart Hub, Home Menu), such as "PC" or your computer's name. Once there, you'll see the folder structure. Navigation is done using the remote, making it very convenient for browsing family archives.
⚠️ Note: The built-in Windows server may not support some audio codecs (such as DTS or TrueHD). If the video is silent, install a third-party DLNA server or use a player that can stream.
The main advantage of DLNA is the ability to control playback directly from the TV remote. In this case, the computer acts merely as a data storage device, and its screen can remain off.
Third-party apps and media servers (Plex, Kodi)
For advanced users with large movie collections, the optimal solution would be to install a full-fledged media server. Plex or Kodi It doesn't just open files, it also downloads covers, descriptions, cast lists, and automatically groups TV series seasons.
The server component is installed on the computer where the files are stored. The client application is installed on the TV via an app store (for example, Google Play on Android TV or the LG Content Store). After the initial setup and pairing of devices using the code, the library becomes accessible through a beautiful interface.
| Program | Difficulty of setup | Interface | Subtitle support |
|---|---|---|---|
| Plex Media Server | Average | Premium, with posters | Automatic |
| Kodi | High | Customizable with skins | Full |
| Windows Media | Low | Standard (folders) | Depends on TV |
| Home Media Server | Average | Simple file list | Eat |
Using these systems requires more time for initial setup, but the results are worth it. You get a personal "Netflix" with your files. The server can run in the background, and you can even access your library from other devices in the house, such as a tablet or smartphone.
Why might Plex require a subscription?
Plex's basic features are free, but some services, like Plex Pass, offer additional features, including syncing for offline viewing on mobile devices, a real-time metadata scanner, and access to premium content. For simple streaming from PC to TV, no paid subscription is required.
Broadcasting via Google Chrome browser
If your TV has Android TV or a built-in Chromecast module, you can use the Google Chrome browser on your computer to cast tabs or the entire desktop. This method doesn't require complex network setup.
Open the Chrome browser on your PC, click the three dots in the upper right corner, and select "Cast." The browser will search for available devices. You can choose to cast a specific tab, the entire screen, or your desktop.
This method is especially convenient for watching online videos from sites that don't have a TV app or block the Cast protocol. However, for local files, it's less efficient, as it requires CPU resources to encode the stream in real time.
Image quality when streaming via Chrome depends heavily on your computer's processor performance. High resolutions (4K) may experience audio lag and lip syncing.
Solving buffering and quality issues
Even with proper settings, users may experience image flickering or buffering pauses. Most often, the problem stems from an unstable Wi-Fi signal or channel congestion. The distance between the router and the TV plays a key role.
Try adjusting the video settings in your player. If you're using DLNA, some servers allow you to configure on-the-fly stream transcoding to reduce network load, although this increases CPU usage on your computer.
- 📡 Move closer to the router or remove any physical obstacles between it and the TV.
- 🔌 Switch your TV or PC to a wired connection (LAN), if possible - this is guaranteed to solve speed problems.
- 🔄 Restart your router to clear the cache and select a less crowded channel.
It's also worth checking your antivirus software. Sometimes the firewall blocks incoming connections from the TV to the computer. Add your media server or movie folder to the Windows Firewall exception list.
FAQ: Frequently Asked Questions
Why can't the TV see the computer on the network?
Make sure your computer's network settings are set to "Private" or "Home," not "Public." Windows hides the device from detection when using a public profile. Also, check that SMB 1.0 is enabled in Windows Features if you have an older TV.
Is it possible to transmit sound separately if the TV is far away?
Splitting streams is difficult using standard Windows tools. However, when using Miracast, audio is transmitted along with video. If you use DLNA, audio comes from the TV speakers. Splitting streams requires special virtual audio cables.
4K video is lagging even though your internet is fast?
Internet speed isn't the issue here; what matters is the speed of your local network (Wi-Fi). 4K requires a stable data transfer rate of at least 25-50 Mbps within the network. Old routers or interference can reduce the actual speed.
Does this work on MacBook and Apple TV?
Yes, but it uses AirPlay technology instead of Miracast. On Windows, to receive an AirPlay signal, you need to install third-party software, such as AirServer or LonelyScreen, to turn your PC into a receiver.