nickkraakman

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

marcotc

nobodypb

#!/bin/bash
SOURCE=/volume1
DEST=/volume2

APPDIR=\@appstore

ASK=true

while getopts ":y" opt; do
  case $opt in

corbanb

function base64url(source) {
	// Encode in classical base64
	encodedSource = CryptoJS.enc.Base64.stringify(source);

	// Remove padding equal characters
	encodedSource = encodedSource.replace(/=+$/, '');

	// Replace characters according to base64url specifications
	encodedSource = encodedSource.replace(/\+/g, '-');
	encodedSource = encodedSource.replace(/\//g, '_');

geekman

#!/bin/bash -e

modprobe libcomposite

cd /sys/kernel/config/usb_gadget/
mkdir g && cd g

echo 0x1d6b > idVendor  # Linux Foundation
echo 0x0104 > idProduct # Multifunction Composite Gadget
echo 0x0100 > bcdDevice # v1.0.0

keijiro

:: Trim from 2″ for 3 seconds, and encode into a "Twitter friendly" format.
ffmpeg -i source.mp4 -pix_fmt yuv420p -an -ss 2 -t 3 temp.mp4

:: Make a palette for GIF.
ffmpeg -i temp.mp4 -vf palettegen=max_colors=24 palette.png

:: Make a GIF with the palette.
ffmpeg -i temp.mp4 -i palette.png -filter_complex "scale=400:-1:flags=lanczos[x];[x][1:v]paletteuse" -r 30 out.gif

eguven

# this original one uses values returned from 'brew info'
brew list --formula | xargs -n1 -P8 -I {} \
    sh -c "brew info {} | egrep '[0-9]* files, ' | sed 's/^.*[0-9]* files, \(.*\)).*$/{} \1/'" | \
    sort -h -r -k2 - | column -t

# faster alternative using 'du'
du -sch $(brew --cellar)/*/* | sed "s|$(brew --cellar)/\([^/]*\)/.*|\1|" | sort -k1h

parzivail

TILCD::TILCD(uint8_t ce, uint8_t di, uint8_t wr, uint8_t rst, uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3, uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7)
{
	_ce = ce;
	_di = di;
	_wr = wr;
	_rst = rst;

	_d0 = d0;
	_d1 = d1;
	_d2 = d2;

gbaman

Setting up Pi Zero OTG - The quick way (No USB keyboard, mouse, HDMI monitor needed)

More details - http://blog.gbaman.info/?p=791

For this method, alongside your Pi Zero, MicroUSB cable and MicroSD card, only an additional computer is required, which can be running Windows (with Bonjour, iTunes or Quicktime installed), Mac OS or Linux (with Avahi Daemon installed, for example Ubuntu has it built in).
1. Flash Raspbian Jessie full or Raspbian Jessie Lite onto the SD card.
2. Once Raspbian is flashed, open up the boot partition (in Windows Explorer, Finder etc) and add to the bottom of the config.txt file dtoverlay=dwc2 on a new line, then save the file.
3. If using a recent release of Jessie (Dec 2016 onwards), then create a new file simply called ssh in the SD card as well. By default SSH i

tomgidden

To control iBooks, you can activate VoiceOver, mute it (as you don't actually want voice),
select the page progress bar, and then use up/down keyboard buttons.

You can set Settings→General→Accessibility→Accessibility Shortcut = VoiceOver to set 
triple-click of Home to (de-)activate VoiceOver.

AT+BLEHIDCONTROLKEY=0x0223    # Sends iOS Home button
AT+BLEHIDCONTROLKEY=0x30      # Sends iOS Power button
AT+BLEHIDCONTROLKEY=0xb8      # Sends iOS Show Keyboard (Eject)
AT+BLEHIDCONTROLKEY=0xb0      # Sends iOS Play