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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

Directory structure for JavaScript/Node Projects

While the following structure is not an absolute requirement or enforced by the tools, it is a recommendation based on what the JavaScript and in particular Node community at large have been following by convention.

Beyond a suggested structure, no tooling recommendations, or sub-module structure is outlined here.

Directories

lib/ is intended for code that can run as-is
src/ is intended for code that needs to be manipulated before it can be used

CSS units

Recommendations of unit types per media type:

Media	Recommended	Occasional use	Infrequent use	Not recommended
Screen	em, rem, %	px	ch, ex, vw, vh, vmin, vmax	cm, mm, in, pt, pc
Print	em, rem, %	cm, mm, in, pt, pc	ch, ex	px, vw, vh, vmin, vmax

Relative units

	public static class IQueryableExtensions
	{
	private static readonly TypeInfo QueryCompilerTypeInfo = typeof(QueryCompiler).GetTypeInfo();

	private static readonly FieldInfo QueryCompilerField = typeof(EntityQueryProvider).GetTypeInfo().DeclaredFields.First(x => x.Name == "_queryCompiler");

	private static readonly PropertyInfo NodeTypeProviderField = QueryCompilerTypeInfo.DeclaredProperties.Single(x => x.Name == "NodeTypeProvider");

	private static readonly MethodInfo CreateQueryParserMethod = QueryCompilerTypeInfo.DeclaredMethods.First(x => x.Name == "CreateQueryParser");

	#!/bin/sh

	DOWNLOAD_DIR="${HOME}/MiniDLNA"
	CONFIG_DIR="${HOME}/.aria2"
	RPC_TOKEN="changeIt"
	RPC_PORT="6800"

	change_apt_source(){
	if [ -f /etc/apt/sources.list ]; then
	sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak

	/* jQuery ui-datepicker extension */

	/**
	*
	* https://gist.github.com/Artemeey/8bacd37964a8069a2eeee8c9b0bd2e44/
	*
	* Version: 1.0 (15.06.2016)
	* Requires: jQuery v1.8+
	* Requires: jQuery-UI v1.10+
	*

	using System;
	using Microsoft.AspNetCore.Mvc.Filters;

	namespace Example
	{
	public class ApiExceptionFilter : Attribute, IExceptionFilter
	{
	public void OnException(ExceptionContext context)
	{
	if (context.Exception is Exception) {

	var mediaJSON = { "categories" : [ { "name" : "Movies",
	"videos" : [
	{ "description" : "Big Buck Bunny tells the story of a giant rabbit with a heart bigger than himself. When one sunny day three rodents rudely harass him, something snaps... and the rabbit ain't no bunny anymore! In the typical cartoon tradition he prepares the nasty rodents a comical revenge.\n\nLicensed under the Creative Commons Attribution license\nhttp://www.bigbuckbunny.org",
	"sources" : [ "http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4" ],
	"subtitle" : "By Blender Foundation",
	"thumb" : "images/BigBuckBunny.jpg",
	"title" : "Big Buck Bunny"
	},
	{ "description" : "The first Blender Open Movie from 2006",
	"sources" : [ "http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/ElephantsDream.mp4" ],

	// The most up to date version is available
	// on GitHub: https://github.com/meziantou/Meziantou.Framework/tree/master/src/Meziantou.Framework.Win32.CredentialManager
	// NuGet package: https://www.nuget.org/packages/Meziantou.Framework.Win32.CredentialManager/

	using System;
	using System.Collections.Generic;
	using System.ComponentModel;
	using System.Runtime.InteropServices;
	using System.Text;
	using Microsoft.Win32.SafeHandles;