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Stream 4K Video to Chromecast Ultra via Plex

Have some 4K video files that you downloaded on your PC and looking for a way to stream the 4K video to your Chromecast Ultra via Plex Media Server. The following article will walk you through the guide to get the job completed.

How to cast Plex to Chromecast Chrome Browser?

After you have the Chrome browser with the Chromecast extension installed on your PC, and logged into your Plex account, you're able to cast from your Plex media server to your Google Chromecast.
- Open your Chrome browser on your PC and navigate to the Plex website to use the Plex Web App.
- Sign in, or sign up for an account if you don't already have one.
- Launch your Plex media server.
- Click on the Chromecast icon located in the upper right-hand portion of your screen.
- Select your Chromecast device.
- Now, you should see Plex on your chosen screen where you have the Google Chromecast connected.
- Start casting from the Plex Web app to your Chromecast on your TV via the Chrome browser.

Stream any 4K video to Chromecast Ultra via Plex

Although you can now stream 4K content to 4K TV via Chromecast Ultra, however, it doesn't mean that you can throw any 4K video to it. From Chromecast Ultra supported file formats, we can see it only supports to stream 4K video with H.264 High Profile Level 4.1, if you try to stream other 4K video such as 4K H.265/HEVC or 4K Prores, your Plex Media Server will try to transcode the 4K file for you. However, it is well known transcoding 4K content is a very intensive process and will require a powerful computer running Plex Media Server. Therefore, if your computer is not powerful enough, Plex will fail to perform the transcoding work for you.

Transcode 4K for Chromecast Ultra Streaming via Plex

The good news is that you can perform the 4K video transcoding work with our best 4K Video Converter - Pavtube Video Converter. Which has full support for various 4K container file formats such as 4K AVI/WMV/MP4/MOV/MKV/FLV/TS/MXF/XAVC/XAVC S and 4K compression codec like 4K H.264/H.265/Prores. Thanks to its batch conversion mode, you can load multiple 4K video into the program for conversion at one time to save your precious time. Here, you can easily transcode unsupported 4K video to Chromecast Ultra native compatible H.264 High Profile MP4 file formats with super fast conversion speed and perfect output video and audio quality.

Related article: Cast MKV File to Chromecast | 2 Ways to Play AVI in Chromecast | Stream 4K to TV via Chromecast  

Hard-ware acceleration for H.264 codec encoding

The biggest merits of this program lies in that it supports hard-ware acceleration for H.264 codec encoding, you can get up to 6x H.264 codec encoding speed as long as you run your PC on Graphic Card that supports Nvidia CUDA or AMD App technology.

Pavtube Video Converter is available on Windows 10/8.1/8/7, it is accompanied by an up-to-date Mac version - Pavtube Video Converter for Mac for macOS High Sierra, macOS Sierra, Mac OS X El Capitan, Mac OS X Yosemite, etc. The program is quite simple to use, anyone can learn to use it in minutes. In addition, it is very stable during the conversion process, there is no sudden crashes.

Tips: Hardware acceleration for H.264 codec encoding are only available for Windows version.

How to Convert 4K Video for Chromecast Ultra Streaming via Plex?

Step 1: Load 4K video into the program.

Download the free trial version of the program. Launch it on your computer. Click "File" menu and select "Add Video/Audio" or click the "Add Video" button on the top tool bar to import source 4K video files into the program.

Load 4K video into the program

Step 2: Output Chromecast Ultra supported file formats.

Clicking the Format bar, from its drop-down list, select Chromecast Ultra compatible 4K file formats "H.264 High Profile Video(*.mp4)" under "Common Video" main category.

Output Chromecast Ultra supported file formats

Tips: Click "Settings" on the main interface to open "Profile Settings" window, here, you can flexibly choose or specify exactly the profile parameters including video codec, resolution, bit rate, frame rate, audio codec, bit rate, sample rate, channels, etc as you like to get better output video and audio quality.

Step 3: Enable GPU Encode Acceleration.

Click "Tools" > "Options", in the opened "Options" window, click "Acceleration" menu, then check "Enable GPU Encode Acceleration" otpion so that the program will accelerate converion speed when encoding video to H.264 codec.

Enable GPU Encode Acceleration

Step 4: Begin the final conversion process.

After all setting is completed, hit the "Convert" button at the right bottom of the main interface to begin the conversion process from unsupported 4K Video to Chromecast Ultra playable 4K format conversion process.

When the conversion is finished, click "Open Output Folder" icon on the main interface to open the folder with generated files. Then feel free to add converted files to Plex library for streaming to Chromecast Ultra.

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