For my project I need to find or short video (1 min) of a UHD video in 4:4:4 I coudn't find any thanks to google. I am now considering making one from 4 full HD stream in 4:4:4 but I don't know what tools I could use.

And by the way, although I read it's possible to make a full HD 4:4:4 stream from a 4K 4:2:0 I didn't find any sample available.

Any advice?

  • What's the use case for the sample?
    – Gyan
    Commented Mar 23, 2016 at 16:22
  • Encoding evaluation
    – RawBean
    Commented Mar 23, 2016 at 16:22
  • Will a synthetic video do, like an animated mandelbrot fractal?
    – Gyan
    Commented Mar 23, 2016 at 16:27
  • 1
    So is the problem finding a Ffmpeg command-line to create uhd 444 video or finding a hi-res video sample? There is a lot of sample footage of all different cameras floating around on the Web I.e. Arri Alexa:arri.com/DE/camera/alexa/learn/alexa_sample_footage Commented Mar 23, 2016 at 16:43
  • @Mulvya yes a synthetic video will be fine
    – RawBean
    Commented Mar 23, 2016 at 17:19

1 Answer 1


You can use ffmpeg, a free command-line tool, to generate some synthetic videos in the required size and pixel format:

Mandelbrot fractal

ffmpeg -f lavfi -i "mandelbrot=s=3840x2160:r=24" -c:v libx264 -pix_fmt yuv444p -t 5 mb444.mov

This will generate a 5 second UHD video @ 24 fps. You can experiment with the various parameters detailed here, such as coloring methods or amount of zoom.

There's also filters to generate patterns as per Conway's Game of Life or a custom cellular automaton, although those will be very 'noisy' with default settings.

You can also use a test pattern as a source:

ffmpeg -f lavfi -i "testsrc=s=3840x2160:r=24" -c:v libx264 -pix_fmt yuv444p -t 5 test444.mov

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