View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0000656 | madVR | bug | public | 2021-01-12 07:45 | 2021-01-13 13:16 |
| Reporter | foobar | Assigned To | |||
| Priority | normal | Severity | minor | Reproducibility | have not tried |
| Status | closed | Resolution | not fixable | ||
| Platform | x64 | OS | Windows | OS Version | 10 |
| Summary | 0000656: HDR not rendering mid tones on some files | ||||
| Description | I've been trying to get HDR to work properly and I have been testing with two files. The problem is that when one of the videos is playing in HDR mode, everything in the mid tones gets crushed, so that the video picture is way too dark. All white tones are very bright, so I know HDR is kicking in. The other HDR test video is completely fine. I can also see from MPC-HC UI with the video where HDR bugs out that the brightness isn't being adjusted. With the video that's working the UI turns into gray but with the video that's not working it stays the same. Video that doesn't work: ``` Video ID : 1 Format : HEVC Format/Info : High Efficiency Video Coding Format profile : Main 10@L5@Main HDR format : SMPTE ST 2094 App 4, Version 1, HDR10+ Profile B compatible Codec ID : V_MPEGH/ISO/HEVC Duration : 51 min 8 s Bit rate : 14.4 Mb/s Width : 3 840 pixels Height : 2 160 pixels Display aspect ratio : 16:9 Frame rate mode : Constant Frame rate : 23.976 (24000/1001) FPS Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 10 bits Bits/(Pixel*Frame) : 0.073 Stream size : 5.16 GiB (95%) Default : Yes Forced : No Color range : Limited Color primaries : BT.2020 Transfer characteristics : PQ Matrix coefficients : BT.2020 non-constant Mastering display color primar : Display P3 Mastering display luminance : min: 0.0001 cd/m2, max: 1000 cd/m2 Maximum Content Light Level : 1000 cd/m2 Maximum Frame-Average Light Le : 296 cd/m2 ``` Video that does work: ``` Video ID : 1 ID in the original source medi : 4113 (0x1011) Format : HEVC Format/Info : High Efficiency Video Coding Format profile : Main 10@L5.1@High HDR format : SMPTE ST 2086, HDR10 compatible Codec ID : V_MPEGH/ISO/HEVC Duration : 7 min 45 s Bit rate : 77.5 Mb/s Width : 3 840 pixels Height : 2 160 pixels Display aspect ratio : 16:9 Frame rate mode : Constant Frame rate : 23.976 (24000/1001) FPS Color space : YUV Chroma subsampling : 4:2:0 (Type 2) Bit depth : 10 bits Bits/(Pixel*Frame) : 0.390 Stream size : 4.20 GiB (96%) Language : English Default : No Forced : No Color range : Limited Color primaries : BT.2020 Transfer characteristics : PQ Matrix coefficients : BT.2020 non-constant Mastering display color primar : BT.2020 Mastering display luminance : min: 0.0050 cd/m2, max: 10000 cd/m2 Maximum Content Light Level : 10000 cd/m2 Maximum Frame-Average Light Le : 1676 cd/m2 Original source medium : Blu-ray ``` I have set MadVR to pass HDR to the display. | ||||
| Additional Information | I'm not sure if this is a bug or something that's fixable with settings. | ||||
| Tags | No tags attached. | ||||
| madVR Version | 0.92.17 | ||||
| Media Player (with version info) | MPC-HC 1.9.2 | ||||
| Splitter (with version info) | No idea :/ | ||||
| Decoder (with version info) | No idea :/ | ||||
| Decoding | DXVA2 Native | ||||
| Deinterlacing | auto mode | ||||
| DXVA2 Scaling Active | yes | ||||
| Aero / Desktop Composition | On | ||||
| Problem occurs with mode | all modes | ||||
| GPU Manufacturer | Intel | ||||
| GPU Model | Iris Plus | ||||
| GPU Driver Version | 27.20.100.9126 | ||||
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Try adding "hdr=on" to the video file name where HDR doesn't work. Does that help? |
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Unfortunately no. It does turn on HDR automatically, but there is something that turns the image way too dark. I just played around with the settings and I turned off Windows HDR and set MadVR to tone map with pixel shaders. The resulting image is still slightly dark but now you can actually see some darker details. It's almost like with Windows HDR and passthrough it uses some different levels curve/color profile with this particular file that crushes all the darker tones. |
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Are you sure that it's really a playback problem? Do you have any other source device which is able to play this file? Many TVs have trouble with HDR and render some HDR movies much too dark. So it could just be the way your display handles this specific movie? |
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Tbh, I'm not sure where the problem is as I can see from the high brightness of whites that HDR is on, but the display isn't reacting like it does usually. This might very well be a display problem, but unfortunately I don't have another HDR device, so testing is hard. Is there anything in MadVR that could potentially help with issues like this where the display itself is problematic? |
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I just found out the setting causing this. In Windows' HDR settings there is a slider called "SDR content appearance" which affects the relative brightness between SDR and HDR. If I have this slider at 0%, the too dark video becomes watchable, however the whites are REALLY bright as expected. However, with the other video I mentioned, 0% "over-exposures" the image to unwatchable levels. At 50% the other video looks perfect. |
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The OS HDR slider is seriously evil. Which is why I strongly recommend not using it. Sadly, for Intel users it's the only way to send HDR to the display. AMD and Nvidia users can bypass the OS HDR switch and still send HDR. So both videos look good at 50%? |
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Unfortunately no. 0% works for the video that was too dark but seriously over-exposures the other one. 50% fixes the over-exposure on the other video but the too dark video becomes too dark again. I guess there is no good solution to this from MadVR's side, but at least now I know what to tweak when this happens. Thanks for your help! |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2021-01-12 07:45 | foobar | New Issue | |
| 2021-01-12 10:45 | madshi | Note Added: 0002764 | |
| 2021-01-12 14:16 | foobar | Note Added: 0002765 | |
| 2021-01-12 18:30 | madshi | Note Added: 0002766 | |
| 2021-01-13 07:28 | foobar | Note Added: 0002767 | |
| 2021-01-13 08:18 | foobar | Note Added: 0002768 | |
| 2021-01-13 09:04 | madshi | Note Added: 0002769 | |
| 2021-01-13 13:15 | foobar | Note Added: 0002770 | |
| 2021-01-13 13:16 | foobar | Status | new => closed |
| 2021-01-13 13:16 | foobar | Resolution | open => not fixable |
