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Beginner
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DVXA2 Intel 8700K 630 UHD Graphics Causing Banding on 4K HDR movies...

Hi,

I've found a serious banding issue (scenes with white clouds show a pink posterization/banding effect) with 4K UHD HDR movies, located the source to be DXVA2 - if I disable H/W GPU acceleration (Native DXVA2) in the LAV video codec, then the banding is gone and scenes look perfectly normal.

I'm using an intel 8700k on-board Intel 630 UHD graphics GPU, tried MB latest graphic drivers and also intel's latest but both exhibit exactly the same issue.

Players -

MPC-BE, MPC-HC Powerdvd 17

Codec's used with MPC variants.

 

Latest MadVR for HDR passthrough

 

Latest LAV codecs - all used with UHD playback

Thanks.

Images of issue...

https://image.ibb.co/dgzvDm/IMG_0659.jpg https://image.ibb.co/dgzvDm/IMG_0659.jpg

https://image.ibb.co/nKvrm6/IMG_0660.jpg https://image.ibb.co/nKvrm6/IMG_0660.jpg

https://image.ibb.co/mwarm6/IMG_0661.jpg https://image.ibb.co/mwarm6/IMG_0661.jpg

https://image.ibb.co/cwEj66/IMG_0662.jpg https://image.ibb.co/cwEj66/IMG_0662.jpg

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17 Replies
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Community Manager
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Hello -Hitman-,

 

 

We received your thread and I understand that you are having Graphic Display issues (banding) when playing 4K HDR movies.

 

Please accept our apologies for the inconvenience that this could be causing.

 

 

In order to help you better I would like to gather more information about the configuration you have in the computer. Please attach to this thread the .txt file the Intel System Support Utility will generate https://downloadcenter.intel.com/download/25293/Intel-System-Support-Utility https://downloadcenter.intel.com/download/25293/Intel-System-Support-Utility

 

To attach a file, you must click •Use Advanced Editor" on the upper right hand corner of the response box, then the "attach" option will appear on the bottom right hand corner of the response box.

 

 

I hope to hear from you soon.

 

Best regards.

 

Diego S.

 

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Beginner
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Hello Diego,

Thank you for your response,

Please see attached file as requested,

Regards.

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Highlighted
Community Manager
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Hello -Hitman-,

 

 

Thank you for your patience.

 

I really appreciate your response and the report that you attached to the thread.

 

We are currently trying to replicate the issue that you have been experiencing here in our facilities.

 

Based on the report that you sent us we will try to copy the same environment and components so as soon as we have news, we will reach to provide you with all the details.

 

I hope to hear from you soon.

 

Best Regards,

 

Diego S.

 

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Beginner
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Thank you Diego,

The movie I used to test was Interstellar 4K UHD hdr, specifically the ice planet approach and landing scenes that contain a lot of frozen white clouds.

I have also noticed if I try and use DXVA2 copy-back or Intel Quick-Sync the banding/posterisation issue disappears but I have severe stutter and dropped frames instead, Intel Quick-Sync has the worst stutter and frame drops of the two.

Regards.

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Community Manager
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Hello -Hitman- ,

 

Thank you for your patience, I really appreciate it.

 

We have been working with your case in our facilities I regret to inform you that at the moment we have been unable to replicate the actual issue, after troubleshooting with several driver versions and different files to play.

 

In this case let me ask, are you using any particular codec pack besides the ones that you already shared, per example: CCCP or K-lite?

 

As well, can you replicate the issue with the following video?

 

http://4kmedia.org/ultra-hd-hdr-samsung-4k-demo-wonderland/ http://4kmedia.org/ultra-hd-hdr-samsung-4k-demo-wonderland/

 

I would like to gather more information about the issue. Please fill out the form that is in the following link and post it on this forum thread:

 

/thread/77761 https://communities.intel.com/thread/77761

 

I hope to hear from you soon.

 

Best regards,

 

Diego S.

 

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Community Manager
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Hello -Hitman-,

 

 

I was taking a look to your thread, and I wanted to confirm if you need further assistance?

 

Please do not hesitate on replying back so we can provide you with assistance regarding your issue.

 

I hope to hear from you soon.

 

 

Best Regards,

 

Diego S.

 

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Beginner
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Hi Diego,

Sorry I had not seen you recently replying to this thread and yes I would like you to investigate further.

I don't have any other codec pack installed, I only use what has been previously stated - Madvr+LAV decoders.

I will test the clip/link you have provided and complete the report form asap and report back.

Kind Regards,

-Hitman-

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Beginner
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Hello Diego,

Yes the issue is present with the clip/link you have provided me, see below images of using DXVA and then D3D11 decoders

Please also see info and attachments as requested......

Category

Questions

Answers (N/A if not 

applicable)

Description

Provide a detailed description of

 

the issue

Colour breakup, posterisation/banding/pixelation using DXVA acceleration decoder and playback of 4k UHD HDR video

Please place an X to the right of

 

the option showing how often you see this issue using specific steps. (Ex:

 

'Every few times a game is started it flickers.' <- This would be<p>  "Often")

Always (100%): X

Often (51-99%):

Sporadic (20-50%):

Very Sporadic (<20%): </span>

Hardware (HW)

Brand and Model of the system.

ASRock Z370 Gaming-ITX/ac based PC with Samsing 950 pro M.2 NVMe SSD - self build HTPC

Hybrid or switchable graphics

 

system?

 

 

ie Does it have AMD or NV graphics too?

No other graphics card installed, only using on-chip Intel UHD 630 IGPU (Intel I7 8700K)

<span style="color: # 3d3d3d; font-family: 'Arial',sans-serif; font-size: 10pt; mso-fareast-fon...

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Beginner
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USING DXVA decoder = bad pixelisation, posterisation/banding between colours

Using new LAV D3D11 decoder = no issues, nice smooth color reproduction between colours

Quote Diego:

As well, can you replicate the issue with the following video?

http://4kmedia.org/ultra-hd-hdr-samsung-4k-demo-wonderland/ http://4kmedia.org/ultra-hd-hdr-samsung-4k-demo-wonderland/

Yes as above - images taken from the clip you provided.

Regards.

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Community Manager
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Hello -Hitman-,

 

 

Thank you for your patience.

 

A new driver version has been released:

 

https://downloadcenter.intel.com/download/27680 https://downloadcenter.intel.com/download/27680

 

We would like to test this out as our team in charge is still working on your case.

 

Please let us know the outcome.

 

I hope this helps.

 

Best regards,

 

Diego S.

 

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Beginner
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Thank you Diego,

I have updated to the latest Windows 10 Spring update - 1803 and then updated to the latest Intel graphics driver, you provided a link for (driver version 24.20.100.6025), unfortunately there is no change in the DXVA acceleration issue and the banding/posterization remains

Tested as per the Samsung Wonderland demo UHD/HDR clip you provided me previously in this thread.

Regards.

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Community Manager
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Hello -Hitman-,

 

Thank you for your response.

 

I'll escalate the case again for further review, we will reach you back as soon as we have an answer.

 

Best Regards,

 

Diego S.
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Highlighted
Moderator
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Hello -Hitman-,

I have been trying to reproduce this issue here in our lab, but I must be doing something wrong since the results I get are very different. Do you mind clarifying a couple of things for me?

These are the steps I am following:

1. Install MPC-BE - I used v1.5.2 (build 3445) beta.

2. Install madVR. - I used v0.92.14

3. Install LAV Video decoder - you mentioned version 0.17 but all I can find online is 0.71.0, is this the right one?.

4. Launch MPC-BE.

5. Go to Options -> Video.

6. Change the Video Renderer to 'madVR'.

7. Go to Options -> External Filters.

8. Click on 'Add Filters' and select 'LAV Video Decoder' then click Ok.

9. Select 'LAV Video Decoder' and change the option to 'Prefer'.

10. Play the sample video.

I guess I must be missing something, and I'm sorry asking for more input from you, but getting a reproducible case is crucial for us to work towards a fix .

I look forward to hearing from you again.

Thank you for your time and patience.

Best Regards,

Ronald M.

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Beginner
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Hi Ronald,

Thank you for looking Into this for me!

Firstly, yes LAV is version 0.71, sorry for the typo (to find the version I am using search LAV nightly builds), although the issue should be evident with any 0.71 version.

You need to add ALL LAV codecs - audio, splitter, splitter source and video in the same order - see my settings snip (Note when installing LAV you have the option to install 32 bit and 64 bit, de-select all 32 bit, install 64 bit only!)

In LAV video decoder settings you need to make sure DVXA is selected and all the 4k options....see snips below to aid your settings

In MPC-BE you also need to make sure ALL internal filers are deselected/disabled,( I suspect MPC-be is using internal filters and not the EXT-Lav) and that you are using the 64 bit version MPC-BE x64.

I have snipped all my settings for you to copy, to aid your testing and hope you can now reproduce the issue,

Extended/Secondary display settings (LG UHD 4k HDR Display for playback) are in another snip I have added in another reply as I can only add 5 at a time.

I look forward to your reply!

Thanks.

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Beginner
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Display settings

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Moderator
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Hi again -Hitman-

I am following all the steps, but I haven't been able to reproduce the issue yet... however when I compare my setup with the one from the screen shots you kindly provided, I am noticing that there is something quite different in my LAV Video Decoder configuration. See below:

As highlighted, it appears the decoder is unable to access the Hardware Decoder. I'm going to try a few more things and even switch to MPC and our latest driver https://downloadcenter.intel.com/download/27847 24.20.100.6136

Thank you for your patience, I'll post more information as soon as possible.

Best Regards,

Ronald M.

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Moderator
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Hi again,

I just want to provide a new update. I handed this over to other engineers so they could attempt to reproduce the issue as well, however they couldn't see the issue either.

I know we have a new driver coming up in the next couple of weeks, so please try it out as soon as it comes out (either via automatic Windows Updates or by downloading from our site).

In the mean time, as a work around I'll suggest using the Default Renderer instead of madVR.

Best Regards,

Ronald M.

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