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Are your videos shown in 4K or 1080p ?

Posted: 22 Apr 2018, 09:27
by koying
Here is a test file to find out whether your videos are shown in 4K or are downscaled/upscaled: 4ktest_red_border_loop.mkv

Look at the highlighted section on your screen.

If the purple text is legible, like:
Image

You have true 4K playback.

If it looks garbled like:
Image
The video was downscaled somewhere in the playback chain.

Picture credits to david.kennedy