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Converting mkv to mp4 with ffmpeg

Essentially just copy the existing video and audio stream as is into a new container, no funny business!

The easiest way to "convert" MKV to MP4, is to copy the existing video and audio streams and place them into a new container. This avoids any encoding task and hence no quality will be lost, it is also a fairly quick process and requires very little CPU power. The main factor is disk read/write speed.

With ffmpeg this can be achieved with -c copy. Older examples may use -vcodec copy -acodec copy which does the same thing.

These examples assume ffmpeg is in your PATH. If not just substitute with the full path to your ffmpeg binary.

Single file conversion example

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$ sudo lsof -nP -i:80
# Example: vmnet-nat 1045    root  9u  IPv4 0x8380  0t0  TCP *:80 (LISTEN)

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Mac Uninstall pkg Manually

• using pkgutil

# list all your installed packages
pkgutil --pkgs

# show your package info
pkgutil --pkg-info 

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Deploy on Github Pages from a folder

1. Create the gh-pages branch and initialize it with nothing except a .gitkeep file.

2. Add gh-pages/ folder in .gitignore to keep git history clean.

3. From the master branch, clone the gh-pages branch into the gh-pages folder:

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Tell ng to use yarn all the times:

$ ng set --global packageManager=yarn

Create a new angular4 project:

$ ng new myapp --ng4 --routing --style=scss

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Comment avoir deux instances autonomes de Firefox utilisant chacun un profil différent

Créer un nouveau profil MyProfile depuis le gestionnaire de profil :

open -a Firefox --args -ProfileManager

Lancer firefox en utilisant ce profil :

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# Get current git branch
function parse_git_branch () {
       git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/ (\1)/'
}
BLACK="\[\033[0;30m\]"
RED="\[\033[0;31m\]"
GREEN="\[\033[0;32m\]"
YELLOW="\[\033[0;33m\]"
BLUE="\[\033[0;34m\]"

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PRE / POST Hook for Bash Prompt

Explained here.

AT_PROMPT=1 
# This will run before any command is executed.
function PreCommand() {
  if [ -z "$AT_PROMPT" ]; then
 return

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ExtendedDefinePlugin will replace ENV variables by their configuration value. Uglify will remove dead code.

1. Copy and modify webpack.config.js

// EDIT by Jean DAT
// Custom code in order to load different configuration files based on context (targeted environment).
// In a configuration file, I store things like the API url to use, etc.
var ExtendedDefinePlugin = require('extended-define-webpack-plugin');

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A nice way to edit an iOS plist file from the shell

Source

#!/bin/bash

if [[ ! -f /usr/libexec/PlistBuddy ]]; then
    exit 0
fi