ntrrgc’s gists

ntrrgc / mp4box_mpd_to_webkit_manifest.py

Created February 18, 2025 17:33

Small utility to convert a DASH MPD file coming from MP4Box into a much simpler JSON manifest as used in WebKit LayoutTests.

	#!/usr/bin/env python3
	"""
	mp4box_mpd_to_webkit_manifest.py:

	Small utility to convert a DASH MPD file coming from MP4Box into a much simpler
	JSON manifest as used in WebKit LayoutTests.

	---

	MIT License

ntrrgc / simple-media-player.html

Last active February 12, 2025 20:04

Simple page with an HTMLMediaElement, event log and basic controls. You can use this as a template to explore the behavior of HTMLMediaElement and look for media playback bugs in web engines.

	<!DOCTYPE html>
	<!--
	Simple page with an HTMLMediaElement, event log and basic controls.
	You can use this as a template to explore the behavior of HTMLMediaElement and
	look for media playback bugs in web engines.
	-->
	<html>
	<head>
	<title>Simple media player</title>
	<meta charset="utf-8">

ntrrgc / multidict.py

Created December 6, 2024 12:45

Python MultiDict, in a copy-paste-able library, because I find myself needing them surprisingly often

	from collections.abc import ItemsView, Set, KeysView
	from typing import Iterable, Iterator, NamedTuple, Hashable

	class MultiDict[K: Hashable, V: Hashable]:
	"""
	Associates sets of values with a key.
	Values can repeat for different keys if needed.
	"""
	def __init__(self):
	self.__vals_by_key: dict[K, set[V]] = {}

ntrrgc / get-terminal-background-color.py

Created May 2, 2024 15:33

OSC 10 & 11: Query terminal foreground and background colors

	#!/usr/bin/env python3
	import os, termios, collections, re

	TermAttr = collections.namedtuple("TermAttr",
	["iflag", "oflag", "cflag", "lflag", "ispeed", "ospeed", "cc"])

	old = TermAttr._make(termios.tcgetattr(0))
	new = old._replace(
	lflag=old.lflag & ~(termios.ECHO \| termios.ICANON)
	)

ntrrgc / mp4parser.py

Last active December 1, 2022 14:07 — forked from mildsunrise/_migrated.md

🕵️‍♀️ MP4 parser / dissector for the command line

	#!/usr/bin/env python3
	'''
	Code by Alba Mendez, manually copied and pasted, had 8 revisions when copied.
	https://gist.github.com/mildsunrise/ffd74730504e4dc44f47fc7528e7bf59

	Portable* ISO Base Media File Format dissector / parser.
	Usage: ./mp4parser.py <file name>

	(*) Needs Python 3.8+

ntrrgc / register_path.sh

Created October 14, 2022 17:03

Function to add paths to env vars such as PATH or LD_LIBRARY_PATH without cluttering them

	register_path() {
	# Usage:
	# register_path <env_var_name> <provided_path> [after]
	#
	# Registers a path in a PATH-like environment variable.
	# The provided_path is prepended unless the "after"
	# argument is provided, in which case it's appended.
	#
	# Example:
	# register_path LD_LIBRARY_PATH /an/important/path

ntrrgc / plot-wpt-compat.py

Created June 10, 2021 13:18

Plots the number of WPT tests passing for a given feature and a set of browsers over time

	#!/usr/bin/python3
	# Instructions:
	# 1. Checkout: https://github.com/Ecosystem-Infra/wpt-results-analysis.git
	# 2. cd compat-2021
	# 3. Edit main.js like this:
	# const CATEGORIES = [
	# + 'media-source',
	# + 'media',
	# ];
	# ...

ntrrgc / backup-nas.sh

Last active April 6, 2020 20:09

My backup script for synology NAS, with safety checks for archival

	#!/bin/bash
	set -eu

	found_not_mounted=0
	function check_not_empty() {
	local path="$1"
	if [ ! -d "$path" ]; then
	found_not_mounted=1
	echo "ERROR: $path does not exist!"
	elif [ ! "$(ls -A "$path")" ]; then

ntrrgc / traceback-add-offsets.py

Created July 25, 2018 17:54

Add library offsets to otherwise useless WebKit crash tracebacks (requires saving /proc/{pid}/maps somewhere before the crash)

	import os
	import re
	from collections import namedtuple

	path_maps = os.path.expanduser("~/tmp/rpi-crash-maps")
	path_stack = os.path.expanduser("~/tmp/rpi-crash-stack")

	MapsLine = namedtuple("MapsLine", ["start", "end", "file"])

ntrrgc / page-watcher.cpp

Created June 30, 2018 15:52

Proof of concept for page-based watchpoints

	#define __USE_POSIX199309
	#include <cassert>
	#include <signal.h>
	#include <mutex>
	#include <functional>
	#include <sys/ptrace.h>
	#include <malloc.h>
	#include <sys/mman.h>
	#include <unistd.h>
	#include <set>

Alicia Boya García ntrrgc