Matt Einhorn matham

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

Raspberry Pi Zero OTG Mode

Simple guide for setting up OTG modes on the Raspberry Pi Zero - By Andrew Mulholland (gbaman).

The Raspberry Pi Zero (and model A and A+) support USB On The Go, given the processor is connected directly to the USB port, unlike on the B, B+ or Pi 2 B, which goes via a USB hub.
Because of this, if setup to, the Pi can act as a USB slave instead, providing virtual serial (a terminal), virtual ethernet, virtual mass storage device (pendrive) or even other virtual devices like HID, MIDI, or act as a virtual webcam!
It is important to note that, although the model A and A+ can support being a USB slave, they are missing the ID pin (is tied to ground internally) so are unable to dynamically switch between USB master/slave mode. As such, they default to USB master mode. There is no easy way to change this right now.
It is also important to note, that a USB to UART serial adapter is not needed for any of these guides, as may be documented elsewhere across the int

channel operator quick reference

direct discussion about administrative action away from the main channel and into #reddit-diabetes-ops to minimise disruption. our -ops channel is the place where users should come to ask for our help. examples:

any sort of operator request or discussion of channel administration in the main channel
PMs asking why a ban was set
reports of harassment (unless the user is confiding in you)
any request for operator action

changing channel access permissions

Locate the section for your github remote in the .git/config file. It looks like this:

[remote "origin"]
	fetch = +refs/heads/*:refs/remotes/origin/*
	url = [email protected]:joyent/node.git

Now add the line fetch = +refs/pull/*/head:refs/remotes/origin/pr/* to this section. Obviously, change the github url to match your project's URL. It ends up looking like this:

	REM Windows Search
	sc config WSearch start=disabled
	REM SSDP Discovery
	sc config SSDPSRV start=disabled
	REM Geolocation Service
	sc config lfsvc start=disabled
	REM ActiveX Installer
	sc config AXInstSV start=disabled
	REM AllJoyn Router Service
	sc config AJRouter start=disabled

	import numpy as np
	import matplotlib.pyplot as plt
	from scipy.spatial import Voronoi

	def voronoi_finite_polygons_2d(vor, radius=None):
	"""
	Reconstruct infinite voronoi regions in a 2D diagram to finite
	regions.

	Parameters