Uploading 3DLUTs to B8 (Alpha7 2nd gen chipset)

[chros73]

Hi!

First of all, thanks for your work! Let me know if you need any help with B8 (Alpha7 2nd gen chipset, 17 points cube).

[bendavid]

Implemented now in principle, but needs to be tested.

3D LUTs can be loaded from .cube files using upload_3d_lut_bt709_from_file(self, picMode, filename) or upload_3d_lut_bt2020_from_file(self, picMode, filename)

in principle it should autodetect the proper capabilities based on the TV model, so for the B8 you should indeed give it a 17 point cube file.

[chros73]

Sounds amazing! Thank You for your work!

Have you tested these by yourself? :) Are we sure that it doesn't break our TV?

Can you create a file for usage with examples? (e. g. uploading SDR and HDR 3dluts) You can create a docs directory, and a Calibration file into it. Definitions are also welcome in it, since I don't know anything about LG TV calibration.

Thank you!

[bendavid]

I have tested this extensively with the C8, but not at all with any other models. I am reasonably sure there is no danger from any of the functions here, but as I have stated elsewhere, I did manage to outright brick my TV by uploading problematic Dolby Vision config data previously (and this is one of the reasons that functionality is not yet exposed in the library).

[chros73]

Thanks for confirming this. I'll try to create a 3dlut for HDR mode (that is what I'm missing) with DisplayCal (following janos666 suggestion) then exporting it to Iridas 17 points cube and I'll be ready to try it out.

[chros73]

I try to run ("install") the util on Windows (I can't compile python 3.8 on Ubuntu 14.04 for whatever reason). So, pip and python is working from command line, but when I fire up this command pip install aiopylgtv it says:

d:\Progs\aiopylgtv>pip3 install aiopylgtv
ERROR: Could not find a version that satisfies the requirement aiopylgtv (from versions: none)
ERROR: No matching distribution found for aiopylgtv

[bendavid]

The package is not released/uploaded yet, so you'll have to build it from source for the moment.

python setup.py sdist pip install dist/aiopylgtv-0.2.0b1.tar.gz

[bendavid]

(You can also try it in an earlier python version. It for sure needs at least python 3.5 though.)

[chros73]

Thanks, that's good news, I can get 3.6 working. I'll take a look later.

[chros73]

Thanks for the help, now 3.6 is fine and I have the command line util:

$ aiopylgtvcommand
usage: aiopylgtvcommand [-h] host command [parameters [parameters ...]]

What commands would you use to create and upload a 3dlut to hdr_technicolorExpert HDR10 preset? And I do not want to deal with 1dlut for this preset.

Thanks

[bendavid]

You can just do

aiopylgtvcommand <hostname> start_calibration hdr_technicolorExpert
aiopylgtvcommand <hostname> upload_3d_lut_bt2020_from_file hdr_technicolorExpert "test3d.cube"
aiopylgtvcommand <hostname> end_calibration hdr_technicolorExpert

The input file for lut upload can be produced from DisplayCal by selecting the IRIDAS(.cube) format, and 17x17x17 or 33x33x33 (17x17x17 for the B8 of course)

If you want to upload a unity 3d lut, you can do it without any file input by doing

aiopylgtvcommand <hostname> start_calibration hdr_technicolorExpert
aiopylgtvcommand <hostname> upload_3d_lut_bt2020 hdr_technicolorExpert
aiopylgtvcommand <hostname> end_calibration hdr_technicolorExpert

[chros73]

Thanks, that helps a lot. More questions about creating only a 3dlut (not 1dlut) for HDR10 (with DisplayCal):

• do I have to measure the patches after "start_calibration" and "ddc_reset"? (meaning in the calibration state?)
• if the above is true then: will the ddc_reset upload a unity 1dlut as well? isn't this a problem?

[bendavid]

ddc_reset WILL upload a unity 1dlut as well, and this IS a problem if you want to keep the factory 1dlut.

You don't need to do the ddc_reset though, calibration mode is enabled just with start_calibration (and this does not modify anything permanently).

So yes, you should start measuring patches after start_calibration in order to bypass the tone mapping. (but can skip ddc_reset entirely).

On the other hand, I have seen in SDR mode that start_calibration significantly changes the behaviour of the image processing without having done a ddc_reset, but that this is not the case after doing the ddc reset. In that case doing the patch measurement after start_calibration would invalidate the calibration. If the set behaves similarly in HDR10 mode this would suggest that it's preferable to use a unity or calibrated 1D LUT as well rather than the factory one (but I think this should be tried both ways and compared.)

Of course after uploading any 1D LUT you would need to do a factory reset in order to get back the factory one.

[bendavid]

Btw you can see here that ddc_reset doesn't do anything magic or special, it just sets brightness, contrast, oled light and color to defaults and uploads unity 1d and 3d luts. https://github.com/bendavid/aiopylgtv/blob/0ff7a63b50f0f6be73ac97670f4875fe6a0dcf3f/aiopylgtv/webos_client.py#L965-L972

[chros73]

ddc_reset doesn't do anything magic or special

Yes, thanks, I saw that.

I have seen in SDR mode that start_calibration significantly changes the behaviour of the image processing without having done a ddc_reset

Since ddc_reset doesn't do anything special (only setting the factory values): maybe one of these settings weren't at its default when you tried that?

One more question about this: in "ddc_reset" oled light and contrast is default to 80 / 85. But HDR10 uses 100 / 100 for these by default. Isn't it an issue? (And DV mode uses 50 / 100 for 2018 models and 100/100 for 2019.)

[bendavid]

Ah yes, you're right, that's a mistake on my side, I'll implement a more dynamic lookup of default values in the next version.

[chros73]

I got this error (websockets 8.1, asyncio 3.4.3, numpy 1.17.4 are installed in virtualenv by pip3):

$ aiopylgtvcommand 192.168.1.78 connect
Traceback (most recent call last):
  File "/home/chros/virtualenvs/venv_lg/bin/aiopylgtvcommand", line 8, in <module>
    sys.exit(aiopylgtvcommand())
  File "/home/chros/virtualenvs/venv_lg/lib/python3.6/site-packages/aiopylgtv/utils.py", line 23, in aiopylgtvcommand
    asyncio.get_event_loop().run_until_complete(runloop(client, args.command, args.parameters))
  File "/usr/lib/python3.6/asyncio/base_events.py", line 467, in run_until_complete
    return future.result()
  File "/home/chros/virtualenvs/venv_lg/lib/python3.6/site-packages/aiopylgtv/utils.py", line 6, in runloop
    await client.connect()
  File "/home/chros/virtualenvs/venv_lg/lib/python3.6/site-packages/aiopylgtv/webos_client.py", line 118, in connect
    self.connect_task = asyncio.create_task(self.connect_handler(self.connect_result))
AttributeError: module 'asyncio' has no attribute 'create_task'

[bendavid]

You shouldn't explicitly call "connect" from the command line tool (connect and disconnect get called implicitly in this case)

But in any case it looks like the issue is python version compatibility.

[chros73]

Hmm, so should I just start with this command and will it take care of pairing? (Same error as above)

aiopylgtvcommand 192.168.1.78 start_calibration hdr_technicolorExpert

I'll try out from windows with 3.8.

[chros73]

aiopylgtvcommand 192.168.1.78 start_calibration hdr_technicolorExpert I'll try out from windows with 3.8.

Thanks, it works with 3.8 from Windows!

[chros73]

Well, this one doesn't do anything, although it returns "yes": picture is the same and there was no toast message that calibration is ended.

aiopylgtvcommand 192.168.1.78 end_calibration technicolorExpert
{'returnValue': True}

[bendavid]

It should restore the tone mapping when you end the calibration assuming you're in hdr mode. In SDR indeed there should be no change (and in practice in the cases where there are it's subtle)

[chros73]

Sorry, I'm only experimenting with SDR technicolorExpert preset:

• start_calibration worked
• but I can't end the calibration (some menu settings are also disabled in Technicolor)

[bendavid]

I don't believe there is supposed to be any visual feedback when ending the calibration.

[chros73]

It seems, you are right: it worked in HDR (ending the session, it was a bigger difference in brightness).

[chros73]

I generated and uploaded an Iridas 17x17x17 3dlut for HDR10 successfully :)

aiopylgtvcommand 192.168.1.78 start_calibration hdr_technicolorExpert
aiopylgtvcommand 192.168.1.78 upload_3d_lut_bt2020 hdr_technicolorExpert
aiopylgtvcommand 192.168.1.78 upload_3d_lut_bt2020_from_file hdr_technicolorExpert "b8bt2020g22p17t1.cube"
aiopylgtvcommand 192.168.1.78 end_calibration hdr_technicolorExpert

Used DisplayCal settings:

[bendavid]

The third command should be rather

aiopylgtvcommand 192.168.1.78 upload_3d_lut_bt2020_from_file hdr_technicolorExpert "b8t1p17.cube"

[chros73]

Oh, crap :) It was too late and I fought too much already with python :) Thanks, I'll try it out tonight. Btw janos666 pointed out that my 3dlut settings in DisplayCal are definitely wrong, I'll update that one as well.

I'll implement a more dynamic lookup of default values

No worries, thanks. And since we can run the uploading unity commands separately, probably it's a good idea to remove all the 3 of them from the "ddc_reset" method:

• it can happen that someone only wants to modify the bt.2020 3dlut in a preset, nothing else
• right now it would clear the other 2 as well

So I think just remove them from ddc_reset, and we have to document it.

And thanks for your work and your amazing support as well! :)

[bendavid]

Well if someone want to only partially reset things then they can just skip the ddc_reset and call the individual commands manually. It's just a convenience function, and I think the documentation is reasonably clear about what it does.

[chros73]

Thanks, that command worked, I edited the above post :) So, it seems B8 works fine as well (although I haven't tried every command yet), so I close this issue.

[chros73]

The new set_bt2020_3by3_gamut_data should not be be "BT709_3BY3_GAMUT_DATA", right? Or is it just for DV and not for HDR10?

[bendavid]

No indeed that's a copy-paste error on my part.

[chros73]

The updated install from source documantion doesn't work (the old one does) in readme at least on Windows (with v3.8):

d:\Progs\aiopylgtv>python setup.py sdist bdist_wheel
usage: setup.py [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
   or: setup.py --help [cmd1 cmd2 ...]
   or: setup.py --help-commands
   or: setup.py cmd --help

error: invalid command 'bdist_wheel'

And hence this one doesn't work either (the old one does):

pip install --upgrade dist/aiopylgtv-0.2.1-py3-none-any.whl

[bendavid]

you need to have "wheel" installed

pip install wheel

[chros73]

Yes, thanks, that's solved the problem. XYZLUT matrix WBRGB patch set: c8_hdr_test4_p5.zip XYZLUT p68 patch set for unity 1dlut + user 3dlut: c8_hdr_test2_p68.zip