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:
/** | |
* Converts an RGB color value to HSL. Conversion formula | |
* adapted from http://en.wikipedia.org/wiki/HSL_color_space. | |
* Assumes r, g, and b are contained in the set [0, 255] and | |
* returns h, s, and l in the set [0, 1]. | |
* | |
* @param Number r The red color value | |
* @param Number g The green color value | |
* @param Number b The blue color value | |
* @return Array The HSL representation |
/* Modern Font Stacks */ | |
/* System */ | |
font-family: system, -apple-system, ".SFNSText-Regular", "San Francisco", "Roboto", "Segoe UI", "Helvetica Neue", "Lucida Grande", sans-serif; | |
/* System (Bootstrap 5.2.0) */ | |
font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", "Liberation Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji"; | |
/* Times New Roman-based serif */ | |
font-family: Cambria, "Hoefler Text", Utopia, "Liberation Serif", "Nimbus Roman No9 L Regular", Times, "Times New Roman", serif; |
All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.
Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.
elem.offsetLeft
, elem.offsetTop
, elem.offsetWidth
, elem.offsetHeight
, elem.offsetParent
function mapValues(obj, fn) { | |
return Object.keys(obj).reduce((result, key) => { | |
result[key] = fn(obj[key], key); | |
return result; | |
}, {}); | |
} | |
function pick(obj, fn) { | |
return Object.keys(obj).reduce((result, key) => { | |
if (fn(obj[key])) { |
export const h=(t,p,...c)=>({t,p,c,k:p&&p.key}) | |
export const render=(e,d,t=d.t||(d.t={}),p,r,c,m,y)=> | |
// arrays | |
e.map?e.map((e,p)=>render(e,d,t.o&&t.o[p])): | |
// components | |
e.t.call?(e.i=render((render.c=e).t(Object.assign({children:e.c},e.p),e.s=t.s||{},t=> | |
render(Object.assign(e.s,t)&&e,d,e)),t.i||d,t&&t.i||{}),d.t=t=e):( | |
// create notes | |
m=t.d||(e.t?document.createElement(e.t):new Text(e.p)), | |
// diff props |
// when T is any|unknown, Y is returned, otherwise N | |
type IsAnyUnknown<T, Y, N> = unknown extends T ? Y : N; | |
// when T is never, Y is returned, otherwise N | |
type IsNever<T, Y = true, N = false> = [T] extends [never] ? Y : N; | |
// when T is a tuple, Y is returned, otherwise N | |
// valid tuples = [string], [string, boolean], | |
// invalid tuples = [], string[], (string | number)[] |