I am wondering if the issue is max_execution_time per https://lycheeorg.github.io/docs/faq.html#i-cant-upload-large-photos . The default value is set to 200, so that's under 3 minutes (can set it to 0 also to disable). Can you set it to much larger value and try? How long does your upload of 1GB take?

You can also set APP_DEBUG=true in the env file and then restart the app. Check for errors in the browser and also Show Logs in the lychee UI after upload fails.

First, thank you for your time and for helping me out.

So, i did a fresh install of lychee, and did exactly the same as you.
In Diag View it shows the same as yours, see:

But i still get this error:

UPDATE: I also tried different browsers. Same error.

This is what I did

• Installed a new package
• Setup user and checked the Diag view.

• Then, I go to File Manager and edit the /app/data/php.ini like below:

; Add custom PHP configuration in this file
; Settings here are merged with the package's built-in php.ini


post_max_size = 100000M
upload_max_size = 100000M
upload_max_filesize = 100000M

• Restart the app

• Check the diag view again:
  

I already had the app ressources set to 2GB, i have now set it to 4GB, didn't change anything.

i changed max_execution_time = 200 to max_execution_time = 200000, this didn't help.

I also changed memory_limit = 256M to memory_limit = 2048M (i have enough RAM left on the server to do this). This didn't help either.

updated, restartet the app, set php.ini as in my previous comment, uploaded a 1GB .mp4 file and got an "unknown error from server".

Here's the log:

2021-10-21 10:32:54 -- notice -- App\Metadata\Extractor::extract -- 126 -- Falling back to native adapter.
2021-10-21 10:32:54 -- error -- App\Metadata\Extractor::extract -- 121 -- Unable to probe /app/code/public/uploads/big/cb19f836c2830ff88ff45694565da65b.mp4
2021-10-21 10:30:13 -- notice -- App\Metadata\Extractor::extract -- 126 -- Falling back to native adapter.