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Old 7th April 2017, 04:59   #8  |  Link
albt
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Join Date: Apr 2016
Posts: 19
Quote:
Originally Posted by benwaggoner View Post
I think you should get your hands on some known-good HDR content (I think there have been download links) and make sure your MadVR setup works with that. Your HDR encoding might be fine, and the issue you're getting is in playback.
After all, maybe it's a normal thing in HDR, or it's a problem of Madvr, but it's different from the source video.

I'm encoding with low bitrate and maybe this is a reason too, I did set the HDR settings right, based in mediainfo, so primaries, matrix, characteristics, matrix, light level, chroma, master display are all right.

I used so many encoding settings used, from slow/slower/veryslow, grain, no tune or the film tune recommended in this forum. Here I explain what I tried:

deblock 0, -1, -2 (less = more details)
rdoq 0, 1, 4, 5, 8, 10 (not big difference)
psy-rd 0.3, 1.5, 1.8, 2 (mostly 2 for less blur)
qcomp 0.6, 0.7, 0.8 (0.8 worked better)
cutree on/off (off worked better)
opt-cu-delta-qp on/off (prefered on)
rskip on/off (only reducing speed for nothing)
aq-mode 1, 2, 3 (2 always fully disabled the hdr -the x265 staff should fix it, 3 worked ok)
ipratio bpratio 1.1-1.0, 1.4-1.3 mostly but also others. (less for more details)
rect, no-amp (amp = no difference, sometimes it also crashed the encoding process)
b-frames 4-6
no-fast-tskip
sao or no-sao
rd-penalty 0, 1, 2 (1 and 2 increased the details of video but changed the lights)

the rest settings were general preset settings.


I did made around 50 test encodes, it was a 500 frame video so I had no problem to spend 10 minutes to encode, but it didn't fix the problem on how I wanted, during the tests I saw from the worst blured encodes to almost no details lost but my problem are the colors. It is a Madvr problem or HDR is just complex? In every encode something changed, even the smallers options changed something. There are red or blue colors appearing likes boxes, pixels etc. Sometimes more, sometimes less, in every encode is different, sometimes there is more red, and it's not in the same part of the frame, it can happen in different. I have an i7 and the source plays well, while the encode has those problems. Don't know if it is a normal thing.


Screens:

1. Colors more white.
http://screenshotcomparison.com/comparison/205881

2. Red things (the second pic is source), this doesn't show everything, as it's not that the red appears only in complex parts like this.
http://screenshotcomparison.com/comparison/205882

3. Blue:
http://screenshotcomparison.com/comparison/205883

Last edited by albt; 7th April 2017 at 05:04.
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