Eric cirediew

FFmpeg cheat sheet

A list of useful commands for the FFmpeg command line tool.

Download FFmpeg: https://www.ffmpeg.org/download.html

Full documentation: https://www.ffmpeg.org/ffmpeg.html

Basic conversion

Falsehoods programmers believe about time

This is a compiled list of falsehoods programmers tend to believe about working with time.

Don't re-invent a date time library yourself. If you think you understand everything about time, you're probably doing it wrong.

Falsehoods

There are always 24 hours in a day.
February is always 28 days long.
Any 24-hour period will always begin and end in the same day (or week, or month).

FFmpeg Cheat Sheet for 360º video

Brought to you by Headjack

FFmpeg is one of the most powerful tools for video transcoding and manipulation, but it's fairly complex and confusing to use. That's why I decided to create this cheat sheet which shows some of the most often used commands.

Let's start with some basics:

ffmpeg calls the FFmpeg application in the command line window, could also be the full path to the FFmpeg binary or .exe file

	// ==UserScript==
	// @name Medium Paywall Bypass
	// @namespace Violentmonkey Scripts
	// @run-at document-start
	// @match ://.medium.com/*
	// @match ://medium.com/
	// @match :///*
	// @grant none
	// @version 2.4
	// @inject-into content

	import 'dart:ui';
	import 'package:flutter/material.dart';
	import 'package:marquee/marquee.dart' as wrapped;

	class Marquee extends StatelessWidget {
	final String text;
	final TextStyle? style;
	final double? textScaleFactor;
	final TextDirection textDirection;
	final Axis scrollAxis;

	import 'package:flutter/widgets.dart';

	/// Conditionally wrap a subtree with a parent widget without breaking the code tree.
	///
	/// [condition]: the condition depending on which the subtree [child] is wrapped with the parent.
	/// [child]: The subtree that should always be build.
	/// [conditionalBuilder]: builds the parent with the subtree [child].
	///
	/// ___________
	/// Usage:

	plugins {
	`android-base-app`
	`android-base`
	id("io.fabric")
	}

	android {
	defaultConfig {
	versionCode = 20
	versionName = "1.6.3"

	/// 0 - Example `Streams`
	Stream<MyUserModel> userStream => FirebaseAuth
	.instance
	.onAuthStateChanged
	.map((user) => MyUserModel.fromFirebase(user));

	String documentPath = 'my/document';
	Stream<MyDocumentModel> documentStream = Firestore.instance
	.document(documentPath)
	.snapshots()

	Encoder hevc_nvenc [NVIDIA NVENC hevc encoder]:
	General capabilities: dr1 delay hardware
	Threading capabilities: none
	Supported hardware devices: cuda cuda d3d11va d3d11va
	Supported pixel formats: yuv420p nv12 p010le yuv444p p016le yuv444p16le bgr0 bgra rgb0 rgba x2rgb10le x2bgr10le gbrp gbrp16le cuda d3d11
	hevc_nvenc AVOptions:
	-preset <int> E..V....... Set the encoding preset (from 0 to 18) (default p4)
	default 0 E..V.......
	slow 1 E..V....... hq 2 passes
	medium 2 E..V....... hq 1 pass

	# Name of the resource we're selectively copying
	GOOGLESERVICE_INFO_PLIST=GoogleService-Info.plist

	# Get references to dev and prod versions of the GoogleService-Info.plist
	# NOTE: These should only live on the file system and should NOT be part of the target (since we'll be adding them to the target manually)
	GOOGLESERVICE_INFO_DEV=${PROJECT_DIR}/${TARGET_NAME}/Firebase/Dev/${GOOGLESERVICE_INFO_PLIST}
	GOOGLESERVICE_INFO_PROD=${PROJECT_DIR}/${TARGET_NAME}/Firebase/Prod/${GOOGLESERVICE_INFO_PLIST}

	# Make sure the dev version of GoogleService-Info.plist exists
	echo "Looking for ${GOOGLESERVICE_INFO_PLIST} in ${GOOGLESERVICE_INFO_DEV}"