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docPhil99 / loguru.md
Last active June 29, 2023 12:33
Python Loguru Hacking

Loguru is my favorite way to perform logging in python. It's generally so simple to use but a few things are missing from the documentation.

Logging over the network

This is based on the loguru example, but also includes the hostname of the sender. To add extra fields the pefered method is to add to record["extra"] dictionary (which is normally empty). The client code sends the log messages over the network and to stderr.

class LoggingSocketHandler:
    def __init__(self, host, port, timeout=600):
@docPhil99
docPhil99 / video_play_back.md
Last active March 31, 2022 13:34
playback of F-log video with LUT on linux

Apply a cube LUT to mpv playback mpv -vf=lut3d=XT4_FLog_FGamut_to_ETERNA_BT.709_33grid_V.1.01.cube FILE.MOV or celluloid --mpv--vf=lut3d=XT4_FLog_FGamut_to_ETERNA_BT.709_33grid_V.1.01.cube FILE.MOV

@docPhil99
docPhil99 / batch_convert_HEIC.md
Last active September 22, 2022 10:42
Fish shell tips - a work in progress

Batch convert HEIC using a fish shell

for p in *.HEIC;
  heif-convert $p (path change-extension jpg $p)
end

Note the path command required fish 3.5

@docPhil99
docPhil99 / pi_networking.md
Last active November 10, 2023 00:16
Setup a Raspberry Pi (or any Ethernet enabled device) on a private network

My system consists of a host PC that has two ethernet cards. What I want to do is use one for connecting to the inernet and the other to run a private network of Raspberry Pi computers.

My first ethenet card is easy, it's basically grabbing its setting via DHCP from my router. What I need to do is create a different subnet for the second card. So first of all I need to look up current IP address. On linux I can run ip a I need to find the address and mask from there. In my case it's the line starting inet 192.168.86.36/24 The 24 is mask, in this case the last digit of the IP address are all on the same subnet. See https://www.calculator.net/ip-subnet-calculator.html here if you want to calculate your own range.

For the second card I need to pick a static IP address that's on a different subnet. There are a number of IP address that are reserved for private networks so it's best to use one of these.

Class A- 10.0.0.0 to 10.255.255.255
Class B- 172.16.0.0 to 172.31.255.255
Class C- 192.168.0.0 to 19
@docPhil99
docPhil99 / Goodman_speckle_test.py
Last active April 17, 2023 11:18
Python version of Joseph Goodman's Mathematica code for simulating laser speckle. Both free space and in an optical system are combined into the one file.
# my conversion of Goodman's code
import numpy as np
import matplotlib.pyplot as plt
# Program for simulating Speckle Formation by Free Space Propagation
# Translate from Mathematica
# Ref: Goodman, Joseph W. 2020. Speckle Phenomena in Optics: Theory and Applications, Second Edition. SPIE.
n = 1024 # nxn array size
@docPhil99
docPhil99 / rename_USB_device.md
Created December 23, 2023 13:17
Renaming USB sound card

My USB speakers seem to have some buggy firmware in that the device name has been corrupted with some binary. At first I thought it was unicode, but uni2ascii said overwise. Since I need to be able to type the name into config files I had to rename the device using udev.

First we need to fine the name of the device. Run udevadm monitor --kernel --subsystem-match=sound

Unplug and re-plug in the DAC, this results in:


KERNEL[1585.716702] remove   /devices/pci0000:00/0000:00:12.0/usb4/4-5/4-5:1.0/sound/card1/controlC1 (sound)