Wrong resolution in export 4K presets?

Forum|Forum|5 years ago
August 10, 2020
5 replies
1782 views

If i choose a H.264 4K preset for Youtube or Vimeo in the in export the outputfile resolution will be downscaled to 2976x1674 if i dont change it manually to 4K (3840x2160). Is there an error in the presets or does 4K on YouTube etc dont relly want full 4K?

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Correct answer David Arbor

Try increasing the Profile Level to 5.2. 5.1 maxes out at 31.7 fps for 3840x2160: https://en.wikipedia.org/wiki/Advanced_Video_Coding

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David ArborCorrect answer

Inspiring

Try increasing the Profile Level to 5.2. 5.1 maxes out at 31.7 fps for 3840x2160: https://en.wikipedia.org/wiki/Advanced_Video_Coding

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petermag78Author

Participant

Thanks that solved the problem!

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RjL190365

Legend

I have discovered exactly the same thing on my system, as well. It turned out that it's the limitation of Adobe's (or rather MainConcept's) implementation of the NVENC hardware encoder. 3k is the maximum that one can do for H.264 and still have hardware encoding even though NVENC technically supports true 4k. If you force 3840x2160, the encoder will default to software-only encoding.

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Michael Grenadier

Legend

so this is a 3rd party plug-in???

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RjL190365

Legend

No. It's just that Adobe never really had an in-house H.264 or HEVC encoder to begin with. In fact, all of Premiere Pro's MPEG encoders (this, by extension, includes the H.264 and HEVC encoders) are actually sourced or licensed from MainConcept.

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David Arbor

Inspiring

Can you post a larger screenshot showing the Video tab? Is the checkbox next to the width and height checked? If you click the big "Match Source" button does that fix this?

Also, what happens if you queue this file to Adobe Media Encoder and apply the same preset there?