H.265 disadvantages with video dimensions not multiple of 8?

Question

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.

Answer 1

Hi there!

There are possibly some slight disadvantages for the codec because those proportions are less used and may be less optimized. However, in theory it should not matter. H.265 compression operates through blocking, and those blocks are not limited to multiples of 8 or 16, they can operate fluidly and complexly to efficiently encode data regardless of the specific resolution you chose (unless it gets too big probably).