meehatpa’s gists

meehatpa / gist:0745ef6d0e4ed78c3d63a94fc0a199d2

Created May 6, 2023 05:06

update duckdns ipv6

curl "https://www.duckdns.org/update?domains=###&token=***&ipv6=`curl -s6 ifconfig.co`&verbose=true"

meehatpa / ffmpeg_cheatsheet

Last active January 15, 2023 12:18

ffmpeg cheatsheet

	# Video from text for x duration
	ffmpeg -f lavfi -i \
	color=size=1920x1080:duration=10:rate=60:color=black \
	-vf "drawtext=fontfile=/path/to/font.ttf:fontsize=14:fontcolor=gray:x=(w-text_w)/2:y=(h-text_h)/2:text='Stack Overflowing'" \
	output.mp4

	# Add text to existing video
	ffmpeg -i output.mp4 \
	-vf "drawtext=text='Centered Text':x=(w-text_w)/2:y=(h-text_h)/2:fontsize=24:fontcolor=gray" -c:a copy output2.mp4

meehatpa / WAphotos.sh

Last active December 31, 2022 08:49

Exiftool

	# WA photos/videos do not have exif data embedded, so first fill them
	exiftool '-alldates<${filename;$_=substr($_,0,12)} 00:00:00' SOURCE

	# Now organize them into YY/YY-mm structure
	exiftool -r -d %Y/%Y-%m '-directory<createdate' "-directory<datetimeoriginal" SOURCE

meehatpa / pre-push

Created March 25, 2021 14:21

git pre-push hook to check clang-format

	for commit in $(git rev-list origin/master..HEAD)
	do
	err=`git --no-pager show $commit \| clang-format-diff-10 -p1`
	if [ -n "$err" ]
	then
	# echo "$err"
	echo >&2 "\"`git log --oneline -1 $commit`\" failed clang-format check!"
	exit 1
	fi
	done

meehatpa / settings.json

Last active June 5, 2021 15:23

Change /etc/systemd/system/multi-user.target.wants/transmission-daemon.service to pick settings.json via ExecStart=/usr/bin/transmission-daemon -f --log-error -g <settings_dir>

	{
	"alt-speed-down": 50,
	"alt-speed-enabled": false,
	"alt-speed-time-begin": 540,
	"alt-speed-time-day": 127,
	"alt-speed-time-enabled": false,
	"alt-speed-time-end": 1020,
	"alt-speed-up": 50,
	"bind-address-ipv4": "0.0.0.0",
	"bind-address-ipv6": "::",

meehatpa / cleanup.sh

Created February 20, 2021 13:42

	#!/bin/bash
	set -e

	prefix=/mnt/usb/
	# delete dir with size < 5 MB
	#DIRRM=`find /mnt/usb -mindepth 1 -maxdepth 1 -type d -exec du -ks {} + \| awk '$1 <= 50000' \| cut -f 2-`
	#IFS='
	#'
	#for i in $DIRRM; do
	# rm -rf $i

meehatpa / combine.py

Created February 1, 2021 10:54

Combine chrome trace json

	import json
	import glob
	import os

	import re

	def clean_json(string):
	string = re.sub(",[ \t\r\n]+}", "}", string)
	string = re.sub(",[ \t\r\n]+\]", "]", string)
	string = re.sub(",$", "", string)

meehatpa / CMakeLists.txt

Created September 22, 2020 11:26

Sample CMakeLists.txt to use add_custom_command

	cmake_minimum_required(VERSION 3.16)
	project(testcmake)

	# Build only when gen.g gets modified
	add_custom_command(
	OUTPUT ${PROJECT_SOURCE_DIR}/gen
	COMMAND ${CMAKE_COMMAND} -E touch ${PROJECT_SOURCE_DIR}/gen
	DEPENDS "${PROJECT_SOURCE_DIR}/gen.g"
	)

meehatpa / http_get_cmd.py

Last active August 24, 2020 07:06

Raspberry pi http server to run shell command using http get from client

	#!/usr/bin/python3
	# Example:
	# http://192.168.1.100:8080/?cmd=ls%20-l&cmd=date
	#
	from http.server import BaseHTTPRequestHandler, HTTPServer
	from urllib.parse import parse_qs
	import subprocess

	class Handler(BaseHTTPRequestHandler):
	def do_HEAD(self):

meehatpa / lru.cpp

Created August 17, 2020 05:48

LRU cache cpp implementation

	#include <iostream>
	#include <list>
	#include <map>

	class cache {

	public:
	cache(int s) : size(s) {};

	void put(int k) {