Below is a step-by-step tutorial to convert 4k movies to HD H.264 for UHD TV.

This converter can be easily found via Google with keywords "Aunsoft Blu-ray Video Converter Ultimate".

Step1. Load 4K movies to 4k movies to HD H.264 Converter

Load the 4K file 4 times to make the procedure in the same time. (You can do the conversion one in a time). BE CAREFUL, the resolution of the clip or the movie must be 3840X2160.

Step2. Choose output format

Choose the right format and the output folder. Here click "Format" icon in the main interface. Choose HD Video> H.264 HD video (* mp4). You can directly enter MP4 in the search bar.

Step3. Crop 4k video

Choose CROP select and click to switch to advanced mode. For the first file make these changes (1920x1080). The same set for file 2, 3 and 4.

Step4. Go to settings section.

In setting section make the changes you want (for audio and others to output smaller file) and then OK

Step5. Conversion

Click "Conversion" icon and the 4K movies to HD H.264 converter for Mac will transcode 4k movies to HD H.264 for UHD TV. run at ultrafast speed.(The time depends on the power of your CPU and the memory). At the end you have to rename the files in MEDIAFLOW as UHD_demo_a_.mp4sub. And enjoy your SAMSUNG TV with 4K resolution.