protrolium

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

You can get the list of installed codecs with:

clhenrick

PostgreSQL & PostGIS Cheatsheet

This is a collection of information on PostgreSQL and PostGIS for what I tend to use most often.

TOC

• Installing Postgres & PostGIS
• Using Postgres on the command line: PSQL
• Importing Data into Postgres
• Exporting Data from Postgres
• Joining Tables

afriza

Compiling and installing ffmpeg with Decklink support on Ubuntu 18.04 Server

• Download Desktop Video (driver) & Desktop Video SDK from https://www.blackmagicdesign.com/support/family/capture-and-playback
• Install Desktop Video (driver)

  tar -xf Blackmagic_Desktop_Video_Linux_*.tar
  cd Blackmagic_Desktop_Video_Linux_*/deb/x86_64/
  sudo dpkg -i desktopvideo_*.deb
  sudo apt-get install -f
  BlackmagicFirmwareUpdater status
  # if prompted to update, perform an update:

rclark

There are a bunch of reasons why this is convoluted, mostly in building the URL to make the request:

1. You have to rely on an AJAX request, this example uses jQuery
2. To make a GetFeatureInfo request, you must provide a BBOX for a image, and the pixel coordinates for the part of the image that you want info from. A couple of squirrely lines of Leaflet code can give you that.
3. Output formats. The info_format parameter in the request. We don't know a priori which will be supported by a WMS that we might make a request to. See Geoserver's docs for what formats are available from Geoserver. That won't be the same from WMS to WMS, however.
4. WMS services return XML docs when there's a mistake in the request or in processing. This sends an HTTP 200, which jQuery doesn't think is an error.

callumacrae

List of JavaScript Build Tools

Yet another framework syndrome

Name	Date	URL	Stars
Jake	April 2010	https://github.com/mde/jake	1000
Brunch	January 2011	http://brunch.io/	3882
smoosh	March 2011	https://github.com/fat/smoosh	329
anvil.js	February 2012	https://github.com/anviljs/anvil.js	161

jbochi

jorisvandenbossche

balexandre

{
	"live_retry_timeout": 60,
	"preferred_language": "en",
	"check_updates": true,
	"save_logs": true,
	"log_location": "",
	"horizontal_layout": false,
	"theme": {
		"background_color": "#000000",
		"border_color": "#0CA597",

delameko

TL;DR

Install Postgres 9.6, and then:

sudo pg_dropcluster 9.6 main --stop
sudo pg_upgradecluster 9.5 main
sudo pg_dropcluster 9.5 main

pjdietz

VirtualBox Host-Only Static IP

My typical setup for a development box in VirtualBox uses two NICs. The first uses NAT to allow the box to communicate with the outside world through my host computer’s network connection. (NAT is the default, so shouldn't require any setup.) The second is a "host-only" connection that allows my host and guest to interact.

To create a host-only connection in VirtualBox, start by opening the preferences in VirtualBox. Go to the "Network" tab, and addd a Host-only Network. Modify the host-only network, and disable DHCP. Make a note of the IP address. (Feel free to set the IP address as well, if you like.)

Next, assign this host-only adapter to the virtual machine. Select the VM and press "Settings". Go to the "Network" tab, and select "Adpater 2". Enable the adapter, set it to a "Host-only Adapter", and select the adpater you created above.

Temporary