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RESERVED! Windows 10, HDR, RGB444 12bits, 1080p23.976 | Grabbers: 1920 x 1080 @ 25 fps (P010)
Example of raw captured P010 stream without tone mapping 
UGREEN 25173Video source is 200 nits, Ugreen returns signal of 205 nits.
UGREEN 25173 details & calibration logWindows: Linux: ELGATO HD60XVideo source is 200 nits, Elgato returns signal of 251 nits.
ELGATO HD60X details & calibration logHagibis 4K THB05Video source is 200 nits, Hagibis returns signal of 255 nits. Bought on Aliexpress for 250 PLN
Hagibis 4K THB05 details & calibration logCalibration logs: |
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Kernel 6.8.0 PC laptop, Ubuntu 24.04.1. Dmesg when Elgato HD60x is connected to the USB port:
Wow, 5 years old thread and nothing has changed: |
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@satgit62 I did it! It's working on Linux now. Another happy kernel hacked (Ubuntu 24.04): 
So far even OBS doesnt support P010 for grabbers on Linux. But what about users? If we tell them to recompile Kernel most of them will probably panic... It's not difficult but it loads the system more than LUT calibration (and there's even no progress bar ;-) ) Maybe I will prepare precompiled modules for RPi's... |
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Hi, this is great news from you. 👍 I'm glad you found a way to get this P010 running on Linux. Yes, recompiling the kernel is not everyone's cup of tea and many can't do it themselves. I hardly know anyone around me who still has a PC at home, and if they do, they certainly don't have Linux. Most young people these days only need a cell phone. Of course, most users will be happy if this is integrated into a build for RPI. |
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@satgit62 In addition to UGreen CM700, I also ordered THB05-4K60Hz from Aliexpress. You have to be careful because the price range is huge: they normally sell it for $91, but in the deals section in the mobile app it's for $60 including VAT. |
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Because my RPi kernel P010 HDR10 patch will probably not be accepted I created an alternative Raspberry Pi OS Lite aarch64 installer with already patched uvc module. It's available here: https://github.com/awawa-dev/P010_for_V4L2/releases/tag/raspios_lite_arm64-2024-10-28
so here we go again into another 5 years hiatus 😉 ? |
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@awawa-dev
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No, nothing. Just send me the result later, because I'm not sure if 150% scale will fit this grabber as I tested it on Elgato only. |
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13 replies
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I may need to replace the 150% scaling with exponential. But I can deal with that once I get UGreen, it should arrive tomorrow or the day after. |
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All right, thanks again, and take your time without stress. I just wanted to rule out the possibility that my UGREEN has a fault. I can still return it if it's faulty. |
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No, the grabber is fine. The bright luminance signal, when scaled by 1.5, inverts over the scale and becomes dark, just like chroma, but the effect is different. |
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Not sure why it doesnt happen while calibration. |
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Then I am reassured. I leave everything else to her magic hands. 🪄🙏😀 |
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HDCP content from the FireTV Stick 4K cannot be processed by the UGREEN. Do you know which HDMI splitter can currently work around this? |
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7 replies
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Ezcap 269 probably had HDCP HDMI 1.4 key embedded |
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Also Ezcap 269 has some non-standard brithness/contrast,hue settings on default if I remember correctly. Similar story to ms2109. You can try to set them into a middle of the scale and test again. |
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But the terrible compression of Ezcap 269 cannot be fixed ;-) |
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Oh, did pass-through the signal through the Ezcap 269 to UGreen to remove HDCP? That wont work, Ezcap 269 has very limited pass-through capabilities and many format/refresh rate/colordeptch are not allowed. But Ezcoo can handle it. |
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Hello, On my Samsung TV the ezcap 269 should finally be replaced by UGREEN or better. |
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@awawa-dev |
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6 replies
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I fixed the problem and additionally found a bug that incorrectly reads the nits brightness during P010 calibration. This explains why the LUT causes flip-over of bright colors (white to black color) in the video material, which was not the case during calibration. But there is a difference: for the same test material Elgato produces material with a brightness of 250nits and UGreen gaves 200nits, which is the same as defined in the video file. I don't know why this is the case but it probably has no side effects for Elgato. Since the gain function for P010 has changed, it will result in the old LUTs for P010 being incompatible. That's why I want to test it more before committing changes with Ugreen and Elgato to be sure that I have selected it correctly because there is some (rather trivial) mathematics there ;) |
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Hello, |
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Hi |
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@awawa-dev |
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Now I found that the gain function is too aggresive for Elgato (UGreen is OK) :-( I will have to lower it because the white color is disturbed in the Elgato logs. Nevertheless it should be a cosmetic change but new version of HyperHDR will invalidate old LUTs for P010. |
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Thanks, @awawa-dev LutCalibrator logs |
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2 replies
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Logs look fine, thank you. I spent all day today testing different gain functions to find the optimal one for both grabbers. I think I found a good solution, but as I mentioned you will now have to do the LUT calibration again. Installer: BTW setting up-scaling chroma in madvr to bilinear improved result by 50% - less artifacts. YUV limited results are much better than full scale range test mp4 for P010. |
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During calibration this setting is completely ignored: you can have it enabled or disabled in HyperHDR, doesnt matter. With one exception: flatbuffers must have it enabled in its settings if you use external NV12 stream. After the calibration tone mapping is enabled globally automatically. |
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@awawa-dev Thank you for the latest change. I have performed a new calibration, and I am very happy with the result. Does the former “ai_calibration” branch no longer exist, or has it been converted to “p010” branch? LUT CALIBRATOR signal range is fixed again.txt |
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4 replies
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Hi @satgit62
Related Pull-Request has been merged so it's master branch now I think there is still a room for improvements for UGreen, at least for the calibration. The gain function is OK so I wont change it anymore that caused LUT incompatibility in the past. On my system the noise is much higher so probably it depends on the player. BTW do you have a possibility to display and capture in HyperHDR this image in HDR (for example in the web browser on the source)? |
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I think I can also make a MP4 with a static frame if you prefer. |
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@awawa-dev Hello, |
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Thank you for merged the AI branch in the master branch. I had overlooked that. |
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@awawa-dev wrote:
Wow, this was a short living promise ;-) New installers: https://github.com/awawa-dev/HyperHDR/actions/runs/11760372571 requires LUT re-calibration. Sorry for inconvenience @satgit62 Edit: There is also a link to the test file This is because today I received a new grabber from Aliexpress: Hagibis THB05. You will find more details in the second post here: #967 (comment). It seems that both use similar video chip but the firmware is completely different. Hagibis also has more capture options... but this black line bug :-/ Apart from that, a very nice option with PD 100W power supply. |
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Recently, grabbers offering the P010 format have started to appear on the market en masse, which until now was reserved for premium grabbers such as the Elgato HD60X, offering sensational color quality of captured HDR material. Theoretically, the grabber model should not affect the captured video because we receive it in a raw state in P010 stream, but we will verify this. The cost of these grabbers is about 25-40% of the cost of Elgato, more expensive than the ms2130, but they have a built-in HDMI splitter. However, do not expect miracles from such splitters, e.g. CEC support or recording with HDCP enabled or EDID modification for LLDV.
Continuation of the discussion from this thread: #896
PR adding P010 format support to HyperHDR for Windows and theoretically for Linux: #968
macOS does not support P010 for UVC at the moment (confirmed by Elgato support).
Linux requires applying a patch for the Kernel because P010 is initially not supported either: For RPi there is already patched OS available.
You must calibrate LUT for P010 usage
Known limitations:
p010 format scales to 150% rigidly. So far no side-effects for HDR. needs to be changedfixed in the latest buildp010 format is generally not supported by Linux. Although UVC devices explicitly offer it, v4l2 ignores it because for some reason support for it has not been added in the last few years.I created a patch for Linux Kernel that adds P010 support for v4l2 and also created already patched Raspberry Pi OS aarch64 installer: https://github.com/awawa-dev/P010_for_V4L2/releases/tag/raspios_lite_arm64-2024-10-28 Just flash it to the SD card and install HyperHDR version that supports P010.Beta Was this translation helpful? Give feedback.
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