09.09.2021, 07:25
Banding artifacts, depending on your settings and format artifacts in dark or flat areas and slight changes due to chroma subsampling. Both can be avoided or at least lessened by:
a. using formats (especially intermediate formats) with 10bit or higher calculation precision
b. adding grain to lessen banding during encoding when going for 8bit formats
c. always use decent bit rates
d. use adaptive quantization if the output format supports it.
Don't really see a reason for that assuming your graphic card supports hardware decoding of H.265 and your NLE isn't crappy. Personally I would use H.264 or H.265 lossless as intermediate and not some lossy format like ProRes. They say it's 'Apple ProRes 422 HQ offers visually lossless preservation of the highest-quality professional HD video that a single-link HD-SDI signal can carry', but that's different from lossless and still will cause degration if you have lots of intermediate steps where you recompress the content over and over again. So if you use lots of intermediate steps I would recommend using a lossless format instead depending on your quality needs. (On Windows you could also use hardware encoding for lossless H.265, H.264 formats.)
Cu Selur
a. using formats (especially intermediate formats) with 10bit or higher calculation precision
b. adding grain to lessen banding during encoding when going for 8bit formats
c. always use decent bit rates
d. use adaptive quantization if the output format supports it.
10 bit ProRes 422HQ should be way faster than to 10bit x265 and will behave way faster and smoother on timeline during editing without need of any proxy or background render.
Cu Selur