Iksas

MPC-HC: HDR videos on SDR displays

With the default settings, HDR videos may have washed-out colors on SDR displays. The following settings can be used to fix this.

Press O to open the settings, and navigate to Playback -> Output in the sidebar.
At the very top, choose MPC Video Renderer
Click the Settings button in the top right to open the renderer's settings
Make sure that the Convert to SDR checkbox is enabled
To improve performance, disable the Use Direct3D 11 checkbox.
Apply the settings, and restart MPC-HC

Crypto miner removal

This manual describes how to remove a trojan I came across on someone else's machine.

The trojan seems to contain a crypto miner, and spreads through infecting USB sticks.

Here are hashes of the trojan's main files:

svctrl64.exe:

md5: b88b2c61844a49fcc54727105ae9abac

Using Nvidia GPUs inside Podman / Docker containers

Install the Nvidia drivers as well as the container toolkit.

Setting up the container

Podman Quadlets

The following settings make Nvidia GPUs available inside Podman Quadlets:

Recover off-screen windows

Sometimes, in Windows 10/11, an application's window can get "stuck" off-screen, and cannot be moved.

The following steps can be used to move the window back to the screen:

Activate the window in the task bar
Press Alt + Space to open the window's menu
Press M
Press Enter

Fast PDF full-text search

The following setup can search the contents of 7000 .pdf files in 0.08 seconds on an i7-1260P (less than 12 microseconds per PDF).

To do so, each .pdf file is first converted to a .txt file, which is stored next to the .pdf. If necessary, OCR is performed. This process takes hours.

As soon as all .txt files are created, they can be quickly searched with ripgrep.

The solution is a bit hacky, but it's what I use at the moment. I'll probably benchmark it against ripgrep-all in the future, and maybe switch to that.

Wireguard multi-tunnel auto-connect in Windows

Set up multiple simultaneous Wireguard tunnels that auto-connect on boot in Windows.

Install the Wireguard tunnels

Install the Windows version of Wireguard and import the two tunnel .conf files.

Set required registry key

Fixing systemd sandboxing errors

Crash with `status=31/SYS`

user@ansible-test:~ $ journalctl -u mongod.service | tail
[...]
Aug 08 17:29:42 ansible-test systemd[1]: Started mongod.service - MongoDB Database Server.
Aug 08 17:29:43 ansible-test systemd[1]: mongod.service: Main process exited, code=killed, status=31/SYS
Aug 08 17:29:43 ansible-test systemd[1]: mongod.service: Failed with result 'signal'.

Fixing `wg-quick` on macOS

On some macOS setups, wg-quick up does not work correctly if the Wireguard configuration includes a DNS server address.

When this error occurs, wg-quick up exits with the following lines, and the Wireguard tunnel will not work:

$ sudo wg-quick up wg0
...
[#] rm -f /var/run/wireguard/utun3.sock
[#] rm -f /var/run/wireguard/wg0.name

Git cheat sheet

Editing

Remove last commit

git reset HEAD^
Remove the last commit, and move its changes to the staging area


	#include <iostream>
	#include <chrono>

	using namespace std;

	int main()
	{
	chrono::steady_clock::time_point begin = chrono::steady_clock::now();