Modern TVs have long since ceased to be mere devices for receiving broadcast signals. Today, they are multimedia centers capable of playing high-definition content from the internet or a local network. However, built-in apps don't always support the required file formats or codecs stored on your hard drive. In such situations, the question arises: how to watch video from a PC on a TV via WiFi without running long HDMI cables across the room.
There are several proven methods for wireless streaming, each with its own advantages. You can use DLNA technology for file streaming, the Wireless Monitor feature for full screen cloning, or dedicated browser apps. The method you choose depends on your goals: whether you simply want to play a movie in the background or show a presentation from your Windows desktop.
In this article, we'll explore the technical details of setting up each method, focusing on connection stability and image quality. We'll cover both standard Windows operating system tools and third-party software that may be needed in more complex situations. You'll also learn why video may lag and how to optimize your network for smooth, lag-free streaming of heavy 4K content.
Technical requirements and equipment preparation
Before setting up the software, you need to ensure your infrastructure is ready to handle large data transfers. The main requirement is that both the computer and TV must be connected to the same local network. This means both devices must operate through the same router, whether wired or WiFi.
For comfortable viewing of high-resolution video, especially in 4K or HDR format, the throughput of the 802.11n standard may not be sufficient. It is advisable to ensure that your router supports the standard. WiFi 5 (802.11ac) or newer, and also worked in the range 5 GHzThe 2.4 GHz frequency is often congested by neighboring networks and household appliances, which leads to micro-breaks in the flow and buffering.
Also, make sure the device discovery feature is enabled on your TV. This option may have different names depending on the brand: Smart View at Samsung, Screen Share For LG, or simply "Device Connection" in the general network settings. Without an active signal receiver module, the TV will be invisible to the computer in the network environment.
DLNA Method: Classic File Streaming
DLNA (Digital Living Network Alliance) technology is the de facto standard for sharing multimedia content between devices on a home network. This method doesn't broadcast the entire desktop image, but allows the TV to view the computer as an external drive containing movies. You select a file on the TV remote, and it begins playing, using the resources of the TV's decoder rather than the PC's graphics card.
Windows 10 and 11 support DLNA by default, but it requires manual sharing. Open Settings, go to Network & Internet, and select Sharing Options. Here, enable network discovery and file sharing for the current network marked as private.
After activating the general settings, you need to specify a specific folder that the TV will see. To do this, right-click the movie folder, select "Properties," and go to the "Access" tab. Click the "Share" button and add a user. All with read permissions. Now the Windows media server is ready to use.
It's worth noting that DLNA doesn't support interactive playback control from a computer as flexibly as streaming services. You won't be able to pause a movie on your PC and resume it on your TV without specialized remote control software. However, this method guarantees minimal load on your computer's processor and maximum compatibility with the video formats supported by your TV.
⚠️ Note: The DLNA protocol does not encrypt transmitted data. If you are on a public network or hotel WiFi, other users could theoretically access your shared folders. Use this method only on trusted home networks.
Screencasting (Miracast and Wi-Fi Direct)
If you want to share browser content, show photos from a program that doesn't support DLNA, or play a game, you'll need screen mirroring technology. In Windows, this is implemented using the Miracast and Wi-Fi Direct protocols. Unlike DLNA, video is encoded by the PC's graphics card in real time and the stream is transmitted to the TV.
To start the broadcast, press the key combination Win + K on your keyboard. The "Connect" panel will open on the right, where Windows will search for available wireless displays. Select your TV from the list. You may see a connection confirmation prompt on the TV screen, which you'll need to accept with your remote.
Once paired successfully, the image from your PC monitor will be fully mirrored on the big screen. You can switch windows, open the Start menu, and work with documents, all while still being visible on the TV. In the projection settings (accessed via Win + P) You can select the "Second Screen Only" mode to turn off your computer monitor and use the TV as your primary display.
☑️ Diagnosing Miracast issues
It's important to understand that this method places a significant load on the WiFi channel and the computer's computing power. Input lag can range from 100 to 500 milliseconds, making it unsuitable for fast-paced shooters, but quite suitable for web browsing, slideshows, or static movie scenes. Image quality may degrade as the signal degrades, causing compression artifacts to appear.
Using Google Chrome Browser and Chromecast
If you have the Google Chrome browser installed, you have access to a powerful casting tool based on Chromecast built-in technology. This method is often more stable than standard Miracast and allows you to cast a browser tab or the entire screen, optimized for video content.
To start casting, open your browser, click the three dots in the upper right corner, and select "Cast." In the window that appears, select the source: this can be a separate tab, the entire desktop, or a specific file. Then select the target device—your TV.
The advantage of this method is the ability to control playback from any device on the network, as long as you're logged in to the same Google account. Furthermore, Chrome can stream system audio even when standard Windows tools can't capture the audio stream from a specific application.
The Secret to Chromecast's High Stability
The technology uses adaptive bitrate coding. If the WiFi signal weakens, Chrome automatically reduces image quality on the fly to avoid playback interruptions, something standard Miracast can't do.
However, it's worth keeping in mind that streaming through a browser consumes a significant amount of RAM. If you have many tabs open or your computer has less than 8 GB of RAM, your system may begin to lag. This method is also tied to the browser being used: closing Chrome will interrupt the stream.
Third-party applications and media servers
For users who require advanced features, standard Windows tools may not be sufficient. There are specialized media server programs, such as Plex, Kodi or JellyfinThey don't just provide access to folders, but also create a beautiful library with posters, movie descriptions, and sorting by genre.
The most popular solution is to pair a Plex server on your PC with a client app on your Smart TV. You install the server on your computer, specify the paths to your media files, and the app automatically downloads artwork and metadata from the internet. On your TV, you launch the Plex app and see a beautifully designed, ready-to-go cinema experience.
The main advantage of such systems is transcoding support. If your TV can't read a certain audio or video format, a server on your PC can transcode the stream on the fly into a compatible format. This requires a powerful processor, but it solves format compatibility issues.
Below is a comparison table of the main connection methods so you can choose the best one for your situation:
| Method | Latency | PC load | Picture quality | Best use |
|---|---|---|---|---|
| DLNA | Low | Minimum | Original (no loss) | Watching movies, photos |
| Miracast | High (100-300 ms) | Medium/High | Compressed (depending on signal) | Presentations, browser |
| Chrome Cast | Average | High (RAM) | Adaptive | Web content, YouTube |
| Plex/Jellyfin | Low | High (when transcoding) | Original or transcode | Home theater |
Network optimization and troubleshooting
Even with the software configured correctly, you may experience video stuttering or image delamination. Most often, the problem lies not with the computer, but with the radio channel. WiFi is a shared-media environment, and interference is normal.
The first step to solving problems is analyzing channel load. Download a WiFi network analyzer app on your smartphone and check what frequency your router is using. If you're in an apartment building, the range 2.4 GHz It will most likely be clogged. Switch your TV and PC to the network. 5 GHz, which has more free channels and a shorter range, but much higher speed.
It's also worth checking the power-saving settings of your computer's network adapter. Windows often tries to save power by reducing the WiFi module's power or putting it into sleep mode, which can cause connection drops when transferring large files. Go to Device Manager, find your wireless adapter, open its properties, and in the "Power Management" tab, uncheck "Allow the computer to turn off this device to save power."
If all else fails and the video continues to stutter, try temporarily disabling your antivirus or firewall. Sometimes they block broadcast packets needed for device discovery or streaming. Also, make sure your router's AP Isolation feature isn't enabled, which prevents devices on the network from seeing each other.
Why can't the TV see the computer on the network?
The most common issue is with the Windows network profile. If the network is marked as "Public," the system blocks discovery. Switch the profile to "Private" in the network settings. Another possible cause is different subnets. Make sure the devices' IP addresses start with the same number (e.g., 192.168.1.X).
Is it possible to stream 4K video over WiFi?
Yes, but only when using WiFi 5 (AC) or WiFi 6 (AX) and a 5 GHz connection. For 4K streaming with a high bitrate (over 60 Mbps), a high-speed connection or very close proximity to the router is recommended, as any signal fluctuations will cause buffering.
Does antivirus affect DLNA speed?
Yes, some antivirus programs scan all network traffic in real time. When transferring large amounts of data, this can create a bottleneck. Try adding the media folder or media server process to your antivirus exclusions.
⚠️ Note: TV and operating system settings interfaces are updated regularly. The location of menu items may vary depending on your Smart TV's firmware version or Windows update. If you don't find an exact match, look for synonyms in the "Network," "Connections," or "Multimedia" sections.