Modern televisions have become multimedia centers, but built-in apps can't always handle high-resolution files or rare formats. Video files are often stored on the hard drive of a desktop PC or laptop, but you want to watch them in high quality on a large screen. Wired HDMI connections can be inconvenient due to cable length or the placement of equipment in different rooms.
Fortunately, wireless technologies make it possible to stream content between devices without losing image and sound quality. This doesn't require complex equipment; all you need is for both devices to be on the same local network. In this guide, we'll cover all the current streaming methods in detail, from standard DLNA protocols to screen mirroring.
The main advantage of this approach is the ability to control playback directly from your smartphone or computer keyboard, without leaving your couch. You can create playlists, skip scenes, and adjust volume using familiar Windows or macOS interfaces. Let's review the technical requirements and get your equipment ready for use.
Technical requirements and equipment preparation
Before you begin setting up, you need to make sure your equipment meets the minimum requirements for stable data transfer. A fundamental requirement is the availability of Wi-Fi module on your TV or connected set-top box. If your TV is older and doesn't have Smart features, you'll need an external device like a Chromecast, Apple TV, or Android box.
The second critical requirement is that all devices be on the same subnet. This means the computer and TV must be connected to the same router. If you have multiple access points or extenders in your home, make sure they are configured correctly and don't isolate devices from each other. The "Guest Network" feature, which by default prevents communication between clients, is often a problem.
⚠️ Attention: To play 4K content without buffering, your Wi-Fi connection speed must be consistently above 25 Mbps. If your router only operates in the 2.4 GHz band, you may experience lag and stuttering when viewing large files.
It's also worth checking the operating system version on your computer. Windows versions 10 and 11 remain current, with multimedia features built in by default. On macOS, the situation is similar, but additional steps are required to ensure compatibility with non-Apple TVs. Make sure your antivirus software or built-in firewall isn't blocking local connections.
Also check your free disk space and RAM if you plan to use your PC as a media server. Although the CPU load during simple streaming is minimal, background tasks can impact connection stability. It's recommended to close heavy applications before starting a session.
DLNA method: classic media file transfer
Technology DLNA (Digital Living Network Alliance) is the most common standard for sharing multimedia content on a home network. It allows you to stream videos, music, and photos from your computer to your TV, using the TV as a client and the computer as a server. This is ideal if you just want to play a movie and not need to use the remote control other than pause and rewind.
In the Windows operating system, implementation of this protocol is built into the standard "Media Streaming" functionality. You don't need to install any third-party software; you just need to configure folder access correctly. On macOS, working with DLNA TVs (such as Samsung or LG) requires installing additional software, as native support is limited to the Apple ecosystem.
To enable this feature in Windows 10 or 11, follow these steps: open Settings, go to Apps, then select Offline Video or Media Streaming. The system will prompt you to enable this feature. Once enabled, you'll see a list of available devices on your network. Find your TV model in the list and set its status to "Allowed."
Next, you need to specify which folders will be available for viewing. By default, the system may only offer standard libraries, but you can add any directory on your hard drive where your movie collection is stored. After adding folders, the TV should see the new signal source in the "Media" or "Home Network" menu within a few seconds.
☑️ Setting up DLNA on Windows
It's worth noting that DLNA doesn't always display subtitles or DVD menus correctly. The menu format may be simplified to a list of files. If the TV doesn't see the folder, check the network type in Windows: it should be set to "Private" and not "Public," otherwise the system will block device detection.
Screencasting (Miracast and Wi-Fi Direct)
If DLNA only allows you to transfer files, then the technology Miracast Provides full mirroring of your computer screen to your TV. In this case, the TV acts as a wireless monitor, displaying absolutely everything that's happening on your PC desktop. This is convenient for showing presentations, viewing content from websites that don't support live streaming, or playing games.
To connect via Miracast in Windows 10 and 11, use a key combination Win + KThe "Connection" sidebar will open, where the system will begin searching for available wireless displays. Select your TV from the list. A connection confirmation prompt may appear on the TV screen, which you'll need to accept using your remote.
Unlike DLNA, the computer's video system performance and Wi-Fi bandwidth are important here. Mirroring creates a real-time video stream, which can lead to input lag. While this isn't critical for watching movies, it can be noticeable for fast-paced games or word processing.
Wi-Fi Direct works similarly, creating a direct connection between devices, bypassing the router. This is useful if the router is weak or located far away. However, in this case, the computer may lose internet access if its Wi-Fi module doesn't support dual-band operation. Most modern laptops with dual bands (2.4 and 5 GHz) handle this function without issue.
Why is there no sound when mirroring?
If you see a picture when connecting via Miracast, but the sound comes from your laptop, check the playback device. Click the speaker icon in the Windows tray and select your TV from the list. Sometimes you need to restart the Windows Audio service.
Image quality when mirroring wirelessly depends on the Wi-Fi standard. Bandwidth usage 5 GHz Significantly reduces compression artifacts and improves video smoothness. If you notice color separation or blockiness in the image, try moving the router closer or switching to 5 GHz.
Using Google Chrome Browser and Chromecast
Ecosystem Google Offers one of the most stable streaming options using Chromecast technology. It's built into many modern TVs (Android TV, Google TV) or can be added via an external set-top box. Its main advantage is the ability to stream a browser tab or the entire screen with minimal latency.
To get started, make sure Google Chrome is installed and updated on your computer. Open the browser and click the three dots in the upper right corner, then select "Cast." The system will search for available devices. You can choose to cast a specific tab, your entire desktop, or a specific file.
This method is especially effective for watching online movies, which can block audio output via standard mirroring methods due to DRM protection. Chromecast can automatically decode the video stream if you send it a link, not just a desktop image. This reduces the load on your computer.
- 📺 Open the menu in your Chrome browser and select "Cast".
- 🖥️ Select source: tab, desktop, or file.
- 🔗 Connect to your TV from the list of devices.
- ▶️ Control playback via your browser or TV remote.
It's important to understand the difference between sending a tab and sending a file. If you drag and drop a video file directly into the browser window and stream a tab, the quality will depend on your PC's performance. If you use a player that supports Cast (such as VLC or some online services), the TV will download the stream automatically, reducing the load on your computer.
Third-party media servers: Plex, Kodi, and Emby
For users with a large movie collection, standard Windows tools may not be sufficient. Software media servers such as Plex, Kodi or Emby, transform an ordinary computer into a full-fledged movie theater with beautiful covers, actor descriptions, and automatic sorting.
The principle is simple: you install the server portion of the program on your computer and specify the paths to the folders containing your media files. The program scans the files, downloads metadata (posters, stories), and creates a library. A client application (available in Smart TV app stores) is installed on your TV, allowing you to access this library.
The main advantage of such systems is on-the-fly transcoding. If your TV doesn't support the audio or video format contained in the file, the server (computer) transcodes the stream on the fly into a format understandable by the TV. This requires a fairly powerful processor, but guarantees compatibility with any device.
| Program | Difficulty of setup | Transcoding | Price |
|---|---|---|---|
| Plex | Low | Automatic | Freemium |
| Kodi | High | Requires configuration | For free |
| Emby | Average | Eat | Freemium |
| Jellyfin | Average | Eat | For free |
Installing Plex is the easiest route for beginners. After registering an account, the server will automatically suggest the optimal settings. However, keep in mind that remote access (outside the home) will require port configuration on your router or a paid Plex Pass subscription.
Troubleshooting connection and buffering issues
Even with proper setup, problems can still arise: video stutters, audio lags behind the picture, or the device isn't connected to the network at all. Most often, this is due to a congested Wi-Fi channel or a weak signal. If the router is in one room and the TV is in another, across two walls, the signal may be unstable.
Check that your bandwidth isn't being occupied by other devices. Downloading torrents on your PC or updating games on your console can clog up the bandwidth needed for streaming video. You can try prioritizing your TV or computer's QoS in your router settings.
⚠️ Attention: Smart TV interfaces and operating system versions are constantly updated. The layout of menu items may differ from those described. Always consult the official documentation from the manufacturer of your specific TV model if you cannot find the option you need.
If the video is choppy, try lowering the stream quality or bitrate. Some players have a buffer setting—increase its value. Restarting the router also helps: simply turning the power off for 10 seconds often clears the error cache and restores connection stability.
Another common issue is a mismatch between the time zones or system time on the PC and TV. When using security certificates and DRM protection, the time difference can block the connection. Make sure both devices are set to automatic time detection.
Frequently Asked Questions (FAQ)
Is it possible to connect a laptop to a TV if there is no router?
Yes, it's possible. You can create a hotspot on your laptop and connect your TV to it via Wi-Fi. However, in this case, the laptop will need two Wi-Fi adapters (one for ethernet, one for internet) or use mobile data, which can be expensive.
Why can't the TV see the computer but open movies?
The problem is most likely with the file format. Your TV may not support the video or audio codec used in the file. Also, check the folder permissions in Windows—make sure the "Everyone" or "Media" user has read access.
Does connecting other devices affect picture quality?
Yes, it does. Wi-Fi is a shared data transmission medium. If other devices are actively downloading files or watching 4K videos, the channel's bandwidth may not be sufficient to stream the movie from your computer, leading to buffering.
How to improve sound quality during wireless streaming?
If your TV produces low-quality sound, try changing the default sound format to a higher resolution (e.g., 24-bit, 48000 Hz) in Windows settings (Sound Control Panel). Some TVs also require you to enable the "Digital Sound Out" option in the audio settings.