x265 wrote:Which of the x264 settings should i change in order to prevent banding?
x265 wrote:I'm using the 10 bit version of x264.
x265 wrote:is it the aq-strength option?


x265 wrote:Should i raise psy-rd to 0.9?
Mister Hatt wrote:RDO has little to nothing to do with what you're describing. The settings to look at in x264 are aq-strength and qcomp. Also note that dithering in avs, or any other type of noise introduction, will reduce banding in small amounts but make it WORSE if you go too far.
x265 wrote:Should i raise psy-rd to 0.9?
While true for particular scenes, knowing the source and judging from the fact he's encoding the entire episode, I think it would hurt the overall quality dropping it as low as 0.6.??Mister Hatt wrote:Reducing qcomp (0.7, maybe 0.6) is a good option for dither compression issues, which is what causes the banding.
RDO relies on the image "complexity" not necessarily image detail (although detail can affect the complexity)? Animation can sometimes bit a bit tricky to encoding software when it comes to this. To the human eye a scene may LOOK rather plain because of a static background, but with some sharply outlined character moving around in front of it, sometimes it makes the image seem a bit more complex for the encoder.Mister Hatt wrote:RDO relies on there being detail in the image to begin with, not fine detail like dither or film grain but larger more visible grains and patterns. It is for complex pattern optimisation.
Ah, actual advice now, and good solid advice, you should have started off with thatMister Hatt wrote:I think qcomp 0.7 is fine in this case but AQ is far too low, in the event of banding you want to go up, not down. Something like aq-strength 1.1 to start with, 1.2 if it doesn't help enough. The other thing to do is reduce the strength of GradFun3 in avs as it's likely making it far worse.
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