Kind of green tint while encoding sd with 10bit depth (staxrip)

[feynek]

Hi gurus, staxrip user here.

I notice a green tint (don't really know how to call the phenomenon) when I encode to standard definition with 10bit depth (x264).

SD 8bit, HD 8bit and HD 10bit encodes are quite matching each others on colorimetry.

That looks weird to me, is it fine to you?

I tried to encode several different series and compare with known good sd 10bit encodes (using same sources),
and it's true that those also have that kind of tint, so I don't know.

Can this be a limitation of x264?

[poisondeathray]

All have the expected negligible shifts - ie. they are all basically the same within tolerance

What is your playback configuration? How are you watching them ? Try a different player like MPCHC, MPV

You can also flag the colorimetry to provide hints to help the player/device to play it properly. Those samples are unflagged

[feynek]

MPC-HC is my only player for years, I keep it up to date thanks to clsid2

I tried to feed those samples in MPV and Potplayer, sames results.

I can also notice it no matter the monitor/tv I watch on.

Flagging primaries, matrix and transfert didn't helped neither.

Well, I guess I'm just too sensitive to even slight shifts x)

[poisondeathray]

Here is a blind test.

The screenshot was taken with direct control over YUV to RGB conversion (601 matrix for SD, 709 for HD) . The HD versions were resized after the RGB conversion to match the SD versions

If your playback chain is setup correctly, this is what the 4 samples should look like

A vectorscope trace is attached to each

Which one is "shifted" with the "green tint" ?

[feynek]

I would say B? This is so weird actually xpp

Those are screenshots from MPC-HC :


[Attachment 70351 - Click to enlarge]

[Attachment 70352 - Click to enlarge]

[Attachment 70353 - Click to enlarge]

[Attachment 70354 - Click to enlarge]

[feynek]

(This post was useless sorry)

[poisondeathray]

I would say B? This is so weird actually xpp

Nope.

So you thought there is a "green tint" in "b" ?

a000000.png corresponds to sample04-sd-10bit.mkv . They were in reverse order



But there is a mild shift in your screenshot for sample04 compare to 03. Attached are your SD samples 03,04 with RGB histogram


[Attachment 70359 - Click to enlarge]

[Attachment 70360 - Click to enlarge]


My mpchc screenshots do not exhibit the shift .

[Attachment 70361 - Click to enlarge]

[Attachment 70362 - Click to enlarge]



So underlying videos are ok. Something is probably misconfigured on your setup for playback . What decoder ? HW/SW decoding ? What renderer?

[feynek]

I am already relieved that this is just a playback issue... I actually noticed this months ago... x)


So, I am using LAV with hardware decoding :


[Attachment 70363 - Click to enlarge]


Renderer is EVR (custom presenter)

[poisondeathray]

My renderer is set to MadVR

[feynek]

Oh my...


[Attachment 70364 - Click to enlarge]

[Attachment 70365 - Click to enlarge]

The worst part is I used to use it back in time until I decided to not use filters and stuffs at playback level...

You are my hero I was getting so mad about it... :'D