Modern home entertainment is unthinkable without the high-quality picture that only a large TV screen can provide. However, storing gigabytes of movies, TV series, and home videos on a computer's hard drive is much more convenient and secure than consuming the built-in storage of a Smart TV. Fortunately, wireless data transfer technologies make it easy to stream content from a PC to a large screen, eliminating unnecessary cables and the need to transfer files.
There are several proven methods for organizing this data exchange, each with its own advantages depending on your TV model and computer operating system. You can use built-in Windows features, dedicated apps from TV manufacturers, or universal network protocols to create a full-fledged media server. Understanding how these technologies work will help you choose the best option for your specific situation.
In this article, we'll cover all current connection methods in detail, configure your network, and resolve common issues that arise when streaming video. Whether you're using Windows 10/11 or older, and regardless of your TV brand, you'll find a working solution. The key is to ensure both devices are on the same local network.
Network requirements and preparatory settings
The foundation of any wireless streaming is a stable local network. For successful high-definition video streaming, especially in 4K resolution, it's critical that both the computer and TV are connected to the same router. If you're using a dual-band router, ensure both devices are within range. 5 GHz, since the frequency 2.4 GHz may not provide enough bandwidth for heavy video.
Check your operating system's sharing settings, as Windows may block devices from being discovered on public networks by default. You'll need to change your network profile to "Private" or "Home" to allow data sharing. Without this step, your TV simply won't see your computer in the list of available signal sources.
⚠️ Warning: Antivirus programs and built-in firewalls often block incoming connections from media servers. If the connection fails, temporarily disable the protection or add an exception for the media service.
It's also worth updating your computer's network card drivers and TV software to the latest versions. Manufacturers regularly release patches that improve protocol stability. DLNA And MiracastOutdated software can cause audio and video to become out of sync or cause the connection to fail completely.
Broadcasting via built-in Windows functions (Projection)
Windows 10 and 11 operating systems are equipped with a native tool for wireless screen mirroring, which is based on the standard MiracastThis method is ideal if you need to show not only a video file, but also the contents of your browser or desktop in real time. To launch, press the key combination Win + K, after which the “Connection” panel will appear on the right side of the screen.
You also need to enable signal reception on your TV. Depending on the brand, this feature may be called "Screen Mirroring," "Broadcasting," "Wireless Display," or "Screen Mirroring." After enabling search mode on your TV, your computer should detect the device in the list of available devices.
- 📺 Press the "Source" or "Input" button on the remote and select wireless connection.
- 💻 In the Projection menu on your PC, select your TV from the list.
- 🔗 Confirm the connection if a permission request appears on the TV screen.
- 🎬 Open the video file in any player and expand it to full screen.
It's worth keeping in mind that this method broadcasts the entire desktop, which can lead to increased CPU load and possible image lag. For viewing regular video, it's better to use other methods. Miracast leave for presentations or display of photo albums.
☑️ Check before connection
Using DLNA technology to play files
Protocol DLNA (Digital Living Network Alliance) is the gold standard for streaming media content over a local network. Unlike screen mirroring, the TV itself acts as the player, receiving the data stream from the computer. This reduces the load on the PC and ensures smoother playback, as buffering occurs on the TV's end.
To set up the server in Windows, open "Media Streaming Settings" in the Control Panel. In the window that opens, you'll see a list of devices on the network. Find your TV and click "Allow" to grant it access to the "Videos," "Music," and "Pictures" libraries.
| Parameter | Description | Recommended value |
|---|---|---|
| Protocol | Transmission technology | DLNA / UPnP |
| Video codec | Compression format | H.264, H.265 (HEVC) |
| Audio codec | Audio format | AC3, AAC, MP3 |
| Container | File shell | MKV, MP4, AVI |
After setting up your computer, go to your Smart TV's app menu. Your PC icon or the name of your media server should appear there. This will give you access to your computer's folders. Important: Your TV may not be able to play some rare audio formats, such as DTS, without support from the TV itself.
Third-party media servers: Plex, Kodi, and Emby
If Windows' built-in tools aren't enough, or your TV's built-in player interface is inconvenient, consider specialized software. The leader in this field is Plex, which not only streams the file, but also creates a beautiful shell with posters, descriptions, and trailers, turning your archive into a Netflix analogue.
Installing the server part of the program on your computer and the client application on your TV (via the LG Content Store, Samsung Apps, or Android TV) allows you to manage your library centrally. Plex Automatically downloads metadata, sorts movies by genre and year, and can also transcode videos on the fly if the TV doesn't support the source file format.
⚠️ Note: The transcoding feature (recoding video on the fly) requires a powerful computer processor. If you experience lag while watching, try disabling transcoding in the settings or select a file with a lower bitrate.
An alternative could be Kodi with UPnP support, which offers more flexible settings for advanced users, or Emby, offering a balance between functionality and simplicity. The choice depends on your interface preferences and the need for remote access to your home collection outside of a Wi-Fi network.
Why is video lagging when using Plex?
The main reason is a lack of computing power for transcoding. If your computer's processor is weaker than a Core i5 or equivalent AMD processor, the server may not be able to handle the 4K HDR stream. Solution: Use a video format natively supported by your TV (usually H.264/H.265 in an MP4/MKV container) and disable forced transcoding in Plex's settings.
Broadcast via Google Chrome browser and Chromecast
If your TV supports the technology Google Cast If you have a Chromecast built-in or a separate Chromecast set-top box, you can use the Google Chrome browser on your computer as a signal source. This method is convenient because it doesn't require complex network sharing setup and works on virtually any website with video content.
To start casting, open the Chrome browser, click the three dots in the upper right corner, and select "Cast." In the menu that appears, select "Cast File" or "Cast Tab," then select your TV. Your computer will act as a server, sending the video stream directly to the TV.
- 🌐 Open the video file locally or in a browser on your computer.
- 📡 Click the "Cast" button in the Chrome menu.
- 📺 Select the target device (your TV).
- 🎞️ Control playback using your PC keyboard or TV remote control.
The advantage of this method is its versatility and the ability to stream content from tabs that don't directly support DLNA. However, image quality may depend on Wi-Fi performance, as the stream is live without pre-buffering large amounts of data.
Troubleshooting buffering and image quality issues
Even with proper setup, users may experience choppy video or out-of-sync audio. Most often, the problem stems from an unstable Wi-Fi signal. Ensure the router is not shielded by metal structures and is within direct line of sight of the receivers, or use a wired connection for your desktop computer.
Another common cause is codec incompatibility. The TV may not understand the audio track. DTS-HD or video codec HEVC 10-bit, even if the file is transferred correctly. In such cases, using a third-party player on the TV itself (for example, VLC for Android or Nova Video Player), which has its own built-in codecs, solves the problem instantly.
If you're using DLNA and the video is choppy, try lowering the stream quality in the server settings or switching your TV to the 5 GHz band. Disabling power saving for your computer's network card also helps, preventing the system from reducing the adapter's power when idle.
Frequently Asked Questions (FAQ)
Why can't the TV see the computer on the network?
Make sure both devices are connected to the same subnet (same gateway IP address). Ensure network discovery and file sharing are enabled in Windows settings. The issue may also be related to your router settings, where Wi-Fi client isolation is enabled.
Is it possible to transmit sound to external speakers via Wi-Fi?
Yes, if you use protocols like Chromecast or AirPlay 2, the audio will be transmitted along with the video. When using DLNA, the TV decodes the audio stream and outputs it through its speakers or a connected system via optical/ARC.
Does watching movies affect internet speed for other devices?
When using DLNA or a local server, traffic flows within your home network and doesn't consume your ISP's bandwidth. However, if you stream content from online cinemas through your browser, your bandwidth usage is normal.
How to improve picture quality during wireless broadcasting?
Use HDMI cables for static devices, if possible. For Wi-Fi, switch to the 5 GHz channel, ensure your router supports Wi-Fi 5 (AC) or Wi-Fi 6 (AX), and minimize the number of microwave ovens operating nearby.