madshi bug tracker

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IDProjectCategoryView StatusDate SubmittedLast Update
0000647madVRbugpublic2020-06-26 19:292020-07-31 22:32
Assigned Tomadshi 
PlatformOSOS Version
Summary0000647: mpc be madvr hdr passthrough does not work anymore
Descriptionsince nvidia changed the hdr code and/or hdr handling in 45x.xx driver branch madvr hdr passthrough does not work anymore.

instead of passthroughing hdr to the display madvr activates windows hdr and sends sdr to display.
Steps To Reproduceinstall 45x.xx.
install madvr.
activate hdr passthrough to display in madvr.
install mpc be and set madvr as renderer.
start a hdr mkv for example.
windows hdr will be activated and sdr movie will appear.
Additional Information-
TagsNo tags attached.
madVR Version0.92.17
Media Player (with version info)MPC-BE.
Splitter (with version info)-
Decoder (with version info)-
DXVA2 Scaling Active<select>
Aero / Desktop Composition<select>
Problem occurs with modeall modes
GPU ManufacturerNVidia
GPU Modelrtx 2080
GPU Driver Versionissue is with 45x.xx branch. last working is 446.14.
Attached Files

- Relationships

-  Notes
B1gD4ddy (reporter)
2020-07-09 22:59

problem is in new 451.67 whql still present.
Cineaste (reporter)
2020-07-19 12:19
edited on: 2020-07-19 15:19

It appears I am now at a point where I have to update the driver purely to keep on top of my games. madshi, do you know what they did to the API? Is it entirely new code?

zeus0r (reporter)
2020-07-27 15:32

same problem here!

current "solution":

when activating win 10 desktop HDR madVR uses OS HDR instead of NV HDR and everything is fine. is there any way to tell madVR to always use OS HDR without enabling/disabling it all the time?
B1gD4ddy (reporter)
2020-07-27 16:10
edited on: 2020-07-27 17:42

ehm nope.

not same problem there since when you do it right like i described and like how everybody uses it currently madvr since 45x.xx always autoactivates os hdr instead of nv hdr and the movie is still washed out sdr.

what you call the solution and are asking for is the damn problem we have.

madvr hdr passthrough is build so nobody needs the disgusting os hdr and for auto activating/deactivating nv hdr at start/close of movie.

btw @ madshi: did you look into that? can you change something and make hdr passthrough work again with 45x.xx?

B1gD4ddy (reporter)
2020-07-27 18:02
edited on: 2020-07-27 18:10

this would be very nice because as we speak people research on dolby vision mkvs.

makemkv for example just added the new matroska 1.6.0 specs for storing dv metadata in mkv.

dolby vision mkvs already work when build with makemkv 1.15.2 and played back by a modified exoplayer apk in kodi!

having working madvr hdr and later on dolby viosion passthrough with 45x.xx+ would be gold.

please tell us the current status.

zeus0r (reporter)
2020-07-28 20:16

ok sorry, that's weird B1gD4ddy.

i just tested it with the latest nvidia drivers (gtx1660 super):

win10 HDR enabled: madvr uses OS HDR & fullscreen windowed and everything works perfectly fine

win10 HDR disabled: madvr uses NV HDR & fullscreen exclusive and HDR is washed out although my display goes to HDR mode
B1gD4ddy (reporter)
2020-07-28 20:34
edited on: 2020-07-28 20:36

yes, when you manually activate win hdr and then start the movie everything works fine.

but when win hdr is turned off and you start the movie and let madvr turn on hdr on its own then it turns on win hdr automatically but movie is still washed out sdr.

but manually activating win hdr everytime before you start a movie is no solution, since we use the madvr hdr passthrough feature for the very reason that it automatically turns on nv hdr when you start the movie and it turns off nv hdr automatically when you close the player. win hdr had never to be touched. it always worked that way until nvidia released 45x.xx.

Cineaste (reporter)
2020-07-30 06:59

Whilst we're waiting I have set up an AutoHotKey that toggles Windows HDR on/off by pressing a button. That button is mapped to a key on my remote so that all I have to do is use my Logitech Harmony (start Kodi > press button to toggle HDR > play movie > press button to automatically turn off HDR).

Not as convenient as madVR auto-switching but much better than manually having to fiddle with settings every time.
cccleaner (reporter)
2020-07-31 22:32

can confirm this behavior too.

I hope madshi can find some time beside his big hardware project to keep the original source alive and properly working. please check this problem.

thank you so much.

- Issue History
Date Modified Username Field Change
2020-06-26 19:29 B1gD4ddy New Issue
2020-06-26 23:47 madshi Assigned To => madshi
2020-06-26 23:47 madshi Status new => assigned
2020-07-09 22:59 B1gD4ddy Note Added: 0002711
2020-07-19 12:19 Cineaste Note Added: 0002714
2020-07-19 15:19 Cineaste Note Edited: 0002714 View Revisions
2020-07-27 15:32 zeus0r Note Added: 0002718
2020-07-27 16:10 B1gD4ddy Note Added: 0002719
2020-07-27 17:42 B1gD4ddy Note Edited: 0002719 View Revisions
2020-07-27 17:42 B1gD4ddy Note Edited: 0002719 View Revisions
2020-07-27 18:02 B1gD4ddy Note Added: 0002720
2020-07-27 18:10 B1gD4ddy Note Edited: 0002720 View Revisions
2020-07-27 18:10 B1gD4ddy Note Edited: 0002720 View Revisions
2020-07-28 20:16 zeus0r Note Added: 0002721
2020-07-28 20:34 B1gD4ddy Note Added: 0002722
2020-07-28 20:36 B1gD4ddy Note Edited: 0002722 View Revisions
2020-07-30 06:59 Cineaste Note Added: 0002724
2020-07-31 22:32 cccleaner Note Added: 0002725

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