Pavel-Sayekat

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

Pavel-Sayekat

for svg in $(ls ./svg); do
	filename=$(echo $svg | cut -d'.' -f1)
	convert -background none -density 1000 -resize 1000x svg/$(echo $filename).svg png/$(echo $filename).png
	echo [DONE] $filename converted!
done

Pavel-Sayekat

// ImageMagick - Convert SVG to PNG w/ transparency
//
// - open terminal
//
// - confirm you have imagemagick installed
// --- type: convert -v
//
// - cd to folder
//
// - single file

Pavel-Sayekat

# /usr/share/usb_modeswitch/2001:ac01 

# Run manually if required using:
#   usb_modeswitch -v 0x2001 -p 0xac01 -c /usr/share/usb_modeswitch/2001:ac01

# D-Link DWM-222 A2
TargetVendor=0x2001
TargetProduct=0x7e3d
StandardEject=1

Pavel-Sayekat

adb help // List all comands

== Adb Server
adb kill-server
adb start-server 

== Adb Reboot
adb reboot
adb reboot recovery 
adb reboot-bootloader

Pavel-Sayekat

There are a few decent tutorials on how to setup hotspot on Linux, which I will share below, but this tutorial will focus on adversities that you without doubt will face while setting up your AP.

For AP setup we will need:

• Hostapd utility
• Some dhcp utility
• A bit of patience (that was for my case)

How do I know that my WiFi adapter supports AP mode?

In terminal type sudo iw list this command will show info about your wifi interfaces. Look for Supported interface entry, if AP is in it, that means your Wifi devices support hotspot mode.

Pavel-Sayekat

== Adb Server
adb kill-server
adb start-server 

== Adb Reboot
adb reboot
adb reboot recovery 
adb reboot-bootloader

== Shell

Pavel-Sayekat

Using ADB to control Accessbility settings for easier testing with Android Emulators + Real Devices

It's a lot easier to test accessibility on the fly using ADB. This gist attempts to make the days of navigating through the Android device settings UI to change Accessibility settings obsolete.

These ADB commands will hopefully encourage Android developers to test and use their apps with common Accessiblility settings enabled.

Credit to James Nitsch for inspiring this, and for figuring out the put commands to enable these settings.

Font Scale (Font Size -- Testing Dynamic Text)

Pavel-Sayekat

# Thin serving Rails.
upstream app_server {
  server 127.0.0.1:3050 fail_timeout=0;
}

# SSL/TLS certificates - the key should be 4096 bit generated with: 'openssl genrsa -des3 -out server.key 4096'
ssl_certificate_key /var/app/deploy/www.thisisatest.com.key;
ssl_certificate /var/app/deploy/www.thisisatest.com.chained.crt;

# Ideally we'd have only TLSv1.2, but that compromises client support significantly

Pavel-Sayekat

# to generate your dhparam.pem file, run in the terminal
openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048