irfanykywz irfanykywz

Extract audio from a YouTube video file

ffmpeg -i INPUT.mp4 -ab 256k OUTPUT.mp3

Cut 3s length

ffmpeg -y -ss 00:00:03 -i INPUT.mp4 -codec copy OUTPUT.mp4

FFmpeg Minimal Build for RTMP Streaming

This tutorial will work you through steps of configuring an FFmpeg build tailored for RTMP streaming on macOS. At first I think of making it support general live streaming, with additional protocols like HLS, but to keep things simple let's stick with RTMP for now. (Anyway, I do include HLS in the protocol list as well as some related bitstream filters but it's untested.)

Goal

The built FFmpeg executable should

	from moviepy.editor import *
	import numpy as np
	clip = VideoFileClip("hams.mkv")
	import sounddevice as sd
	import soundfile as sf
	from queue import Queue
	from collections import OrderedDict
	import pprint
	pp = pprint.PrettyPrinter(indent=4)
	print('started')

	<html>
	<head>
	<script src="qrc:///qtwebchannel/qwebchannel.js"></script>
	<style>
	::selection {
	background:transparent;
	}
	</style>
	</head>

	import random

	class Key:

	def __init__(self, key=''):
	if key == '':
	self.key= self.generate()
	else:
	self.key = key.lower()

	#!/usr/bin/python3
	# -- coding: utf-8 --

	from PyQt5.QtCore import Qt
	from PyQt5.QtGui import QImage, QPixmap, QPalette, QPainter
	from PyQt5.QtPrintSupport import QPrintDialog, QPrinter
	from PyQt5.QtWidgets import QLabel, QSizePolicy, QScrollArea, QMessageBox, QMainWindow, QMenu, QAction, \
	qApp, QFileDialog

	import asyncio
	import random
	import time


	async def worker(name, queue):
	while True:
	# Get a "work item" out of the queue.
	sleep_for = await queue.get()

	#!/usr/bin/python3
	# -- coding: utf-8 --
	import sys
	from PyQt5.QtWidgets import (QWidget, QPushButton, QLineEdit, QProgressBar, QApplication,
	QVBoxLayout, QHBoxLayout, QLabel, QFileDialog)
	from PyQt5.QtGui import QIcon
	from PyQt5.QtCore import QThread, pyqtSignal, QSettings, QStandardPaths

	import queue #If this template is not loaded, pyinstaller may not be able to run the requests template after packaging
	import requests

	#!/usr/bin/python3
	# -- coding: utf-8 --

	from PyQt5.QtGui import QPalette, QKeySequence, QIcon
	from PyQt5.QtCore import QDir, Qt, QUrl, QSize, QPoint, QTime, QMimeData, QProcess, QEvent
	from PyQt5.QtMultimedia import QMediaContent, QMediaPlayer, QMediaMetaData
	from PyQt5.QtMultimediaWidgets import QVideoWidget
	from PyQt5.QtWidgets import (QApplication, QFileDialog, QHBoxLayout, QLineEdit,
	QPushButton, QSizePolicy, QSlider, QMessageBox, QStyle, QVBoxLayout,
	QWidget, QShortcut, QMenu)

	#!/bin/sh

	sleep 5
	ffmpeg -re -f mjpeg -r 10 -i "http://localhost/?action=stream" -ar 44100 -ac 2 -acodec pcm_s16le -f s16le -ac 2 -i /dev/zero -acodec aac -ab 1k -strict experimental -s 640x360 -vcodec h264 -pix_fmt yuv420p -g 20 -vb 500k -preset ultrafast -crf 31 -r 10 -f flv "rtmp://a.rtmp.youtube.com/live2/xxxx-xxxx-xxxx-xxxx" 2> /home/pi/ffmpeg.log