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# To extract the sound from a video and save it as MP3:
ffmpeg -i <video.mp4> -vn <sound>.mp3

# To convert frames from a video or GIF into individual numbered images:
ffmpeg -i <video.mpg|video.gif> <frame_%d.png>

# To combine numbered images (frame_1.jpg, frame_2.jpg, etc) into a video or GIF:
ffmpeg -i <frame_%d.jpg> -f image2 <video.mpg|video.gif>

# To quickly extract a single frame from a video at time mm:ss and save it as a 128x128 resolution image:

deffjay

PHP-FPM / Swoole - Performance Comparison!

Here are some comparative benchmarks of our API using PHP-FPM vs Laravel Octane (Swoole) endpoints.

Test Hardware - Setup

• Macbook Pro (15-inch, 2018) - 2.6 GHz 6-Core Intel Core i7. 32 GB 2400 Mhz
• MySQL - 8.0
• PHP - 8.0.3
• Laravel - 8.83.5

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ffmpeg

Converting Audio into Different Formats / Sample Rates

Minimal example: transcode from MP3 to WMA:
ffmpeg -i input.mp3 output.wma

You can get the list of supported formats with:
ffmpeg -formats

Convert WAV to MP3, mix down to mono (use 1 audio channel), set bit rate to 64 kbps and sample rate to 22050 Hz:

deffjay

#!/bin/bash

# Create a new user named morpheus
useradd -m -s /bin/bash morpheus

# Add users to sudo or wheel group
usermod -aG sudo morpheus #Debian/Ubuntu
usermod -aG wheel morpheus #CentOS/RHEL

# Create Home Directory + .ssh Directory

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Install the Clockwork library via Composer.

$ composer require itsgoingd/clockwork --dev

If you are running the latest Laravel version, congratulations you are done!

By default, Clockwork will only be available in debug mode, you can change this and other settings in the configuration file. Use the vendor:publish Artisan command to publish the configuration file into your config directory.

deffjay

do {
  let jsonEncoder = JSONEncoder()
  jsonEncoder.outputFormatting = .prettyPrinted
  let jsonData = try jsonEncoder.encode(palettes)
  if let jsonString = String(data: jsonData, encoding: .utf8) {
      print(jsonString)
   }
} catch {
  print("error")
}

deffjay

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

deffjay

mysql -h 127.0.0.1 -u root -p"*******" database < applications.sql
mysql -h 127.0.0.1 -u root -p"******" database < publishers.sql

deffjay

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

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Multiple SSH Keys settings for different github account

create different public key

create different ssh key according the article Mac Set-Up Git

$ ssh-keygen -t rsa -C "your_email@youremail.com"