Grey blacks with internal player + EVR (1 Viewer)
- Thread starter djphatic
- Start date
A thought - did this problem first show up in MP 1.0.1/1.0.2 ?
This post by Tourettes - https://forum.team-mediaportal.com/422879-post54.html - explains that the video rendering process was changed in MP 1.0.1 onwards, so that video is rendered to a texture instead of directly to the display surface. This is to allow proper mixing of the GUI and video.
I wonder if there is a bug in some ATi driver versions related to video texture handling i.e. video to computer RGB level conversion isn't performed ?
As far as I know, other (simple) players like MPC-HC, Kmplayer etc don't do the render-to-a-texture process - they presumably render direct to a display surface and hence don't trigger the ATi driver problem.....
Just my 2 cents.....
Tony
This post by Tourettes - https://forum.team-mediaportal.com/422879-post54.html - explains that the video rendering process was changed in MP 1.0.1 onwards, so that video is rendered to a texture instead of directly to the display surface. This is to allow proper mixing of the GUI and video.
I wonder if there is a bug in some ATi driver versions related to video texture handling i.e. video to computer RGB level conversion isn't performed ?
As far as I know, other (simple) players like MPC-HC, Kmplayer etc don't do the render-to-a-texture process - they presumably render direct to a display surface and hence don't trigger the ATi driver problem.....
Just my 2 cents.....
Tony
Well, i can shake hands with you guys, i'm having the same problem and it's freaking me out for over 2 weeks now (since i got my panel ISF calibrated....).
When i play a movie with the internal player my blacks are grey (using MPC Video Codec) but when i play the same movie outside MP by using the MPC-HC Player, my blacks are as black as they should be without any shaders active or anything.
I've been testing this issue with a few calibration DVD's and for some reason it looks that MP is doing something with brightness/contrast settings on the internal player.
** EDIT **
OK, EVR is doing something wrong inside. When i switch to VMR9 and play the same movie with the internal player, i get the correct blacklevels!
So.... EVR is defo doing something to the video at this point, the only question is: What does it do and how do we disable it to fix our blacklevels?
** EDIT 2 **
And with EVR disabled and VMR9 enabled i can even see the BTB and WTW differences again on the calibration disc.
When i play a movie with the internal player my blacks are grey (using MPC Video Codec) but when i play the same movie outside MP by using the MPC-HC Player, my blacks are as black as they should be without any shaders active or anything.
I've been testing this issue with a few calibration DVD's and for some reason it looks that MP is doing something with brightness/contrast settings on the internal player.
** EDIT **
OK, EVR is doing something wrong inside. When i switch to VMR9 and play the same movie with the internal player, i get the correct blacklevels!
So.... EVR is defo doing something to the video at this point, the only question is: What does it do and how do we disable it to fix our blacklevels?
** EDIT 2 **
And with EVR disabled and VMR9 enabled i can even see the BTB and WTW differences again on the calibration disc.
I'm with you HomeY.
I only run in EVR, but the grey blacks occur not only for hidef material, but also xvids.
It is something to do with ATI (catalyst 9.2 and above) + EVR + Mediaportal.
It went way over my head, but someone mentioned texture drawing or something -might this be the issue?
I only run in EVR, but the grey blacks occur not only for hidef material, but also xvids.
It is something to do with ATI (catalyst 9.2 and above) + EVR + Mediaportal.
It went way over my head, but someone mentioned texture drawing or something -might this be the issue?
I can't figure out a way why this would be ATi related. It's easy, if you play the video in MPC-HC or PowerDVD9, the quality is outstanding. When i play the same video with the same codecs inside mediaportal with VMR9 enabled, all looks very well the only thing i've noticed last night is shocking video (hick-ups) on horizontal pans, but black = black. When i play the same videos with again the same codecs inside MP with EVR enabled, my blacks are grey from the start!
So it seems to be something with EVR.
And if someone has a working solution for this, that would defo make my day!!!
I think everyone who is complaining about this issue is using ATi - nVidia users (like myself and Paranoid Delusion) don't have the problem.
As I mentioned in my previous post, there was a change in the way video is rendered in MP 1.0.1 onwards - ironically to fix the flickering GUI problem that only ATi users were experiencing - this seems to be showing up a problem in the newer ATi drivers. Other players render video in a different way (more like the pre-MP 1.0.1 method) so they don't show up the problem.
So use an earlier driver, drop back to MP 1.0.0 or use a codec with adjustable output levels (as ssip96 suggested).
Tony
- March 4, 2008
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The devs can stop working then...
I suggest this issue is posted as a bug in the bug-section. This way, it can be fixed.
https://forum.team-mediaportal.com/bugreports-74/
Tony,
You have a point, that ATI should work OK with the way Mediaportal is written to render to the display.
The ideal solution is to get either ATI to recognise this issue or Mediaportal to find a way to use the new method of drawing and also get around this problem.
I would be happy to look into filing a bug with ATI but not having developed the change in Mediaportal, can anyone post a fairly descriptive detail of what is now being done in Mediaportal that exposes the problem, so that I can pass it on to ATI?
If this is not easy to convey, would someone who is equipped to describe it, consider posting a bug report with ATI?
Thank you.
You have a point, that ATI should work OK with the way Mediaportal is written to render to the display.
The ideal solution is to get either ATI to recognise this issue or Mediaportal to find a way to use the new method of drawing and also get around this problem.
I would be happy to look into filing a bug with ATI but not having developed the change in Mediaportal, can anyone post a fairly descriptive detail of what is now being done in Mediaportal that exposes the problem, so that I can pass it on to ATI?
If this is not easy to convey, would someone who is equipped to describe it, consider posting a bug report with ATI?
Thank you.
This doesn't feel like an ATI driver bug because:
1. When i'm using an external player like PowerDVD of MPC-HC outside MediaPortal, all blacklevels are correct.
2. When i'm using the PDVD9 or MPC Video Codec inside mediaportal (internal player) with VMR9 enabled, all blacklevels are correct.
But when you enable EVR inside MediaPortal with the same codecs used as above, the blacks show up as grey.
So i would defo say that this is EVR related.
And saying that the solution is to use another codec, sorry, but that's no solution, it's an alternative. 2nd is that CoreAVC doesn't support DXVA.
quote ssip96
That's never gonna give the correct blacklevels since you're pushing PC levels into Video Levels while all source material (DVD, BluRay, HD-DVD) is recorded @ videolevels (16-235) which will all be expanded to PC levels if you output that (which will result in grey blacks or crushes which will take all your detail away).