Rohit J syntaxhacker

Create a new repository, or reuse an existing one.

Generate a new SSH key:

ssh-keygen -t rsa -C "[email protected]"

Copy the contents of the file ~/.ssh/id_rsa.pub to your SSH keys in your GitHub account settings (https://github.com/settings/keys).

Test SSH key:

#dart:convert example

How to pretty-print JSON using Dart.

How to display JSON in an easy-to-read (for human readers) format.

Main library: dart:convert
Main element: JsonEncoder.withIndent
Gist: https://gist.github.com/kasperpeulen/d61029fc0bc6cd104602

Video conversion with FFmpeg

Install

On mac:

Download the latest release.
Extract the binary and place it in /usr/local/bin.

Command basics

Installing Node.js with `nvm` to Linux & macOS & WSL

A quick guide on how to setup Node.js development environment.

Install `nvm` for managing Node.js versions

nvm allows installing several versions of Node.js to the same system. Sometimes applications require a certain versions of Node.js to work. Having the flexibility of using specific versions can help.

Open new Terminal window.

Low-Latency Live Streaming for your Desktop using ffmpeg and netcat:

Preamble:

In this post I will explore how to stream a video and audio capture from one computer to another using ffmpeg and netcat, with a latency below 100ms, which is good enough for presentations and general purpose remote display tasks on a local network.

The problem:

Streaming low-latency live content is quite hard, because most software-based video codecs are designed to achieve the best compression and not best latency. This makes sense, because most movies are encoded once and decoded often, so it is a good trade-off to use more time for the encoding than the decoding.

Use Python to:

send a plain text email
send an email with attachment
receive and filter emails according to some criteria

Encoding high-quality HEVC content in a two-pass manner with FFmpeg - based NVENC encoder on supported hardware:

If you've built ffmpeg as instructed here on Linux and the ffmpeg binary is in your path, you can do fast HEVC encodes as shown below, using NVIDIA's NPP's libraries to vastly speed up the process.

Now, to do a simple NVENC encode in 1080p, (that will even work for Maxwell Gen 2 (GM200x) series), start with:

ffmpeg  -i <inputfile> -pass 1 \
-filter:v hwupload_cuda,scale_npp=w=1920:h=1080:format=nv12:interp_algo=lanczos,hwdownload,format=nv12 \

-c:v hevc_nvenc -profile main -preset slow -rc vbr_2pass \

	// Two ways to serve transparent GIF

	var buf = new Buffer([
	0x47, 0x49, 0x46, 0x38, 0x39, 0x61, 0x01, 0x00, 0x01, 0x00,
	0x80, 0x00, 0x00, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x2c,
	0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x02,
	0x02, 0x44, 0x01, 0x00, 0x3b]);

	res.send(buf, { 'Content-Type': 'image/gif' }, 200);

	// Highcharts CheatSheet Part 1.
	// Create interactive charts easily for your web projects.
	// Download: http://www.highcharts.com/download
	// More: http://api.highcharts.com/highcharts


	// 1. Installation.
	// Highcharts requires two files to run, highcharts.js and either jQuery, MooTools or Prototype or the Highcharts Standalone Framework which are used for some common JavaScript tasks.
	// <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
	// <script src="https://code.highcharts.com/highcharts.js"></script>

	# Clone the repository from GitHub
	git clone --recursive https://github.com/uglide/RedisDesktopManager.git -b 0.8.0 rdm && cd ./rdm

	# Compile the source
	cd src/
	./configure
	source /opt/qt56/bin/qt56-env.sh && qmake && make
	sudo checkinstall -D --install
	sudo gdebi /home/$USER/rdm/src/src_*.deb
	cd /usr/share/redis-desktop-manager/bin