hossein s. borhani junguler

ffmpeg

Converting Audio into Different Formats / Sample Rates

Minimal example: transcode from MP3 to WMA:
ffmpeg -i input.mp3 output.wma

You can get the list of supported formats with:
ffmpeg -formats

Convert WAV to MP3, mix down to mono (use 1 audio channel), set bit rate to 64 kbps and sample rate to 22050 Hz:

set http or socks proxy environment variables

# set http proxy
export http_proxy=http://PROXYHOST:PROXYPORT

# set http proxy with user and password
export http_proxy=http://USERNAME:PASSWORD@PROXYHOST:PROXYPORT

# set http proxy with user and password (with special characters)

UPDATED 22.11.2022

It's been two years since the last update, so here's the updated working script as per the comments below.

Thanks to BryanHaley for this.

setInterval(function () {
    video = document.getElementsByTagName('ytd-playlist-video-renderer')[0];

 video.querySelector('#primary button[aria-label="Action menu"]').click();

Select the object(s) to export
Open the document properties window (Ctrl+Shift+D)
Select "Resize page to drawing or selection"
File > Save As Copy...
Select Optimized SVG as the format if you want to use it on the web

As far as I am aware the time has come and as of Firefox 72 XUL has been stripped from firefox and so the method used to inject this scrollbar theme is no longer supported -- reference the following for future scroll themes:

Mozilla is currently working to phase out the APIs used to make this theme work. I will try to maintain each version until that time but eventually there will be no workaround. When that time comes there is a new, but more limited api for applying simple themes to scrollbars. In nightly I am currently using the following userContent.css

:root{
	scrollbar-width: thin;
	scrollbar-color: rgb(82, 82, 82) rgb(31, 31, 31);
}

How to add a collapsible section in markdown

1. Example

Click me

Heading

Foo
Bar
- Baz

Qux

Console 2 on Windows with Bash

Why

Cmd sucks. Powershell is weird. I like tabs. Git for windows uses cygwin. Cygwin doesn't interpret ANSI colours.

Thingos to download

Git for Windows: https://git-scm.com/download/win
Console2: https://github.com/cbucher/console/wiki/Downloads

Elapsed and execution time display for commands in ZSH

Append this to your ~/.zshrc file.

function preexec() {
 timer=$(($(date +%s%0N)/1000000))

	@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
	@namespace html url("http://www.w3.org/1999/xhtml");

	/*
	** In order for userChrome.css to work, you need to open `about:config` and change
	** `toolkit.legacyUserProfileCustomizations.stylesheets` to `true`.
	*/

	-- settings
	-- key_binding: press the key specified below
	-- to cycle between denoise filters below,
	-- set it to nil to disable the binding
	local key_binding = "n"
	-- key_binding_reverse cycle between denoise filters below
	-- in reverse order, set it to nil to disable the binding,
	-- set it to a single-char string to enable
	local key_binding_reverse = nil