Motoi Shimizu motoishmz

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

Convert WAV to MP3, mix down to mono (use 1 audio channel), set bit rate to 64 kbps and sample rate to 22050 Hz:

twitterの検索術 (`search/tweets` と `search/universal`)

注

search/tweets では一週間以上前のツイートは検索できないので注意

search/universal は公式のConsumerKey/ConsumerSecretでないと使用できない

当方では一切の責任を負いません

Trigonometry

const float PI = 3.1415926535897932384626433832795;
const float PI_2 = 1.57079632679489661923;
const float PI_4 = 0.785398163397448309616;

float PHI = (1.0+sqrtf(5.0))/2.0;

RGB - YUB

mat3 yuv2rgb = mat3(1.0, 0.0, 1.28033, 1.0, -0.21482, -0.38059, 1.0, 2.12798, 0.0);
mat3 rgb2yuv = mat3(0.2126, 0.7152, 0.0722, -0.09991, -0.33609, 0.43600, 0.615, -0.5586, -0.05639);

RGB - HSV

Extracted from https://github.com/rpavlik/maya2osg/tree/master/src/GLSL

Vertex Shader

varying vec2 vTexCoord;
varying vec3 vNormal;
varying vec3 vEye;

void main() {

    vec2 offSet[4];
 	offSet[0] = vec2(0.,0.);
    offSet[1] = vec2(0.,1.);
    offSet[2] = vec2(1.,0.);
    offSet[3] = vec2(1.,1.);

	vec3 zAxis = normalize( vNormal[0] );
    vec3 yAxis = vec3( 0.0, 1.0, 0.0 );
 vec3 xAxis = normalize( cross(zAxis, yAxis) );

Generic 1,2,3 Noise

float rand(float n){return fract(sin(n) * 43758.5453123);}

float noise(float p){
	float fl = floor(p);
  float fc = fract(p);
	return mix(rand(fl), rand(fl + 1.0), fc);
}

	#!/usr/bin/env python

	'''
	DEPENDENCIES:
	$ brew install ffmpeg
	$ brew install imagemagick

	$ python ./mov2gif.py input.mov output.gif 15
	'''

	// Amazonの注文履歴をTSV形式で出力するスクリプト
	//
	// 2015-01-01 時点での DOM 構造に対応, GoogleCrome, Opera でテスト済。
	// formatEntry関数を書き換えれば自由な書式で出力できます。
	//
	// 参考:
	// - Amazonの注文履歴をCSV形式にして出力するスクリプト
	// https://gist.github.com/arcatdmz/8500521
	// - Amazon で使った金額の合計を出す奴 (2014 年バージョン)
	// https://gist.github.com/polamjag/866a8af775c44b3c1a6d

	#!/bin/sh

	### Desktop & Screen Saver

	# Desktopを黒に
	echo "Change Desctop Pictures"
	osascript -e 'tell application "Finder" to set desktop picture to POSIX file "/Library/Desktop Pictures/Solid Colors/Black.png"'

	# ScreenSaver Kill
	echo "Disable screensaver"