H.F. JiangXL

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:

Python Socket 编程详细介绍

Python 提供了两个基本的 socket 模块：

Socket 它提供了标准的BSD Socket API。
SocketServer 它提供了服务器重心，可以简化网络服务器的开发。

下面讲解下 Socket模块功能。

Socket 类型

rss2pdf

Simple php page where after submitting an rss feed from news.google.com it will grab the contents of the RSS and gernerate a PDF output with one article from the XML per page.

Functionality is specifically made to parse news.google.com rss, but other rss feeds may be input as well. Other inputs will only display the description and no other data without further edits.

Demo

Input rss/xml feed you would like to have parsed submit it. You will see a notice to view your pdf submission. Click to view. An example url that you can use is http://news.google.com/news?pz=1&cf=all&ned=us&hl=en&output=rss.

Run a live demo: http://sapioweb.com/rss2pdf

How to boot straight to application, with auto-login, and fluxbox as a window manager

Write the raspbian-jessie-lite image to an SD card
Run apt-get install xorg-server xinit fluxbox
Edit /etc/systemd/system/getty.target.wants/[email protected] and add your username to ExecStart like ExecStart=-/sbin/agetty -a <user name> %I $TERM
Add to bottom of .profile: [[ -z $DISPLAY && $XDG_VTNR -eq 1 ]] && exec startx
Add ~/.xinitrc with:

exec /usr/bin/startfluxbox

Convert sequence of JPEG images to MP4 video

ffmpeg -r 24 -pattern_type glob -i '*.JPG' -i DSC_%04d.JPG -s hd1080 -vcodec libx264 timelapse.mp4

-r 24 - output frame rate
-pattern_type glob -i '*.JPG' - all JPG files in the current directory
-i DSC_%04d.JPG - e.g. DSC_0397.JPG
-s hd1080 - 1920x1080 resolution

	# systemd's udev hwdb breaks our keyboard tablet mode switcheroo thing. Fix it.

	evdev:atkbd:dmi:bvn:bvr:bd:svnHewlett-Packard:pnHPSpectrex360Convertible:pvr
	KEYBOARD_KEY_ab=unknown # emitted by brightness keys
	KEYBOARD_KEY_d7=f22 # normal mode - turn touchpad on
	KEYBOARD_KEY_d8=f23 # tablet mode - turn touchpad off

	#!/bin/bash
	# file format: ARTIST/ALBUM/01-TITLE.flac
	read -p "YEAR? " -n 4 YEAR
	ALBUM="${PWD##*/}" # ALBUM=$(basename "${PWD}")
	ARTIST=$(echo $(cd .. && echo "${PWD##*/}"))

	# delete all
	metaflac --preserve-modtime --remove-all-tags *.flac
	# artist, album, year and cover
	metaflac --preserve-modtime --set-tag=ARTIST="${ARTIST}" --set-tag=ALBUM="${ALBUM}" --set-tag=DATE=${YEAR} --import-picture-from=Folder.jpg *.flac

	# After Ubuntu 16.04, Systemd becomes the default.
	# It is simpler than https://gist.github.com/Doowon/38910829898a6624ce4ed554f082c4dd

	[Unit]
	Description=Jupyter Notebook

	[Service]
	Type=simple
	PIDFile=/run/jupyter.pid
	ExecStart=/home/phil/Enthought/Canopy_64bit/User/bin/jupyter-notebook --config=/home/phil/.jupyter/jupyter_notebook_config.py

	import JSON
	###################
	### Write data ####
	###################
	# dictionary to write
	dict1 = Dict("param1" => 1, "param2" => 2,
	"dict" => Dict("d1"=>1.,"d2"=>1.,"d3"=>1.))

	# pass data as a json string (how it shall be displayed in a file)
	stringdata = JSON.json(dict1)

	// Prompt to get sigma values for the Difference of Gaussians filtering
	Dialog.create("Choose filter sizes for DoG filtering");
	Dialog.addNumber("Gaussian sigma 1", 1);
	Dialog.addNumber("Gaussian sigma 2", 2);
	Dialog.show();
	sigma1 = Dialog.getNumber();
	sigma2 = Dialog.getNumber();

	// Get the current image
	idOrig = getImageID();