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Are there any disadvantages (like worse image quality/more compression artefacts) when encoding a video in H.265 with dimensions that are not a multiple of 16 or 8, but instead a multiple of 4 or 2? For example 1920x816 vs. 1920x818.

At least in file size there seems to be no difference, as far as my tests go.

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Since H.265 is computer intensive, encoding H.265 video will consume a lot of time, especially your computer is not power enough. You have to upgrade your CPU and GPU and download a powerful HEVC video encoder that is able to activate the GPU acceleration to do the task.

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    That didn't answer the question at all. Please read again, I want to know the disadvantages of encoding a video where the dimension are a multiple of 2 compared to e.g. 8 – M.J.K Sep 28 '18 at 10:08

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