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cut sequence from mp4 video

ffmpeg -ss <start_time_hh:ii:ss> -i input.mp4 -to <length_in_hh:ii:ss_from_start> -c copy ./out.mp4
ffmpeg -ss 00:47:42 -i input.mp4 -to 00:01:49 -c copy ./out.mp4

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create thumbnail images from input video (@30fps)

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CSS Compression

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Resources to help comparing & evaluating different CSS compressing techniques in general, and specifically different open-source CSS compressor implementations, with a clear focus on, but not limited to, JS/NodeJS based tools.

(CSS) Compression Techniques

"Long, fragile lists of self-contradictory rules"
— Douglas Crockford on CSS

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// ---------------------------------------
// By Steven Levithan <stevenlevithan.com>
// <blog.stevenlevithan.com/archives/fast-string-multiply>
// ---------------------------------------

var mul_sl_0 = function (str, num) {
	if (!num) return "";
	var newStr = str;
	while (--num) newStr += str;
	return newStr;

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Engine name / version	Testruns started	Testruns failed	Bytes saved (cumm.)	Compression ratio	Processing time (cumm.)
clean-css (@4.1.2)	14	0	29.67 %	1.422:1	1002.73 ms
clean-css (advanced off) (@4.1.2)	14	0	29.67 %	1.422:1	623.93 ms
crass (@0.10.3)	14	1	34.10 %	1.518:1	9703.95 ms
crass (o1 off) (@0.10.3)	14	1	31.33 %	1.456:1	4887.22 ms
css-condense (@0.1.1)	14	0	29.18 %	1.412:1	353.16 ms
cssnano (@3.10.0)	14	0	33.85 %	1.512:1	9234.36 ms
csso (@3.1.1)	14	0	32.73 %	1.487:1	924.32 ms
csso (restructure off) (@3.1.1)	14	0	29.43 %	1.417:1	186.18 ms

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Click to open cssmin.js demo (opens the raw gist URL of cssmin-demo.html via rawgit.com)

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"Fork" of the official cssmin.js demo, which is broken since a while (because of hotlinking assets to raw.github.com).

Hotlinking assets to raw.github.com produces mime type errors, as files are returned as text/plain by the server. So I just replaced the raw.github.com link with a rawgit.com link to fix the mime type issue, thus the demo.
(Official demo is hosted outside the Github universe. No chance to send a PR, thus this "fork".)

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(function(window) {
    "use strict";

    var mutations = {
        attrib: [],
        childs: {
            add: [],
            del: []
        }
    };

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Windows Resource Kit Tools

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Advanced tool-set to streamline administrative tasks for Microsoft® Windows®.

Overview

Description

The Microsoft® Windows® Resource Kit Tools (RK-Tools) are a set of tools to help System-Administrators, Developers, and Powerusers streamline a wide range of common, administrative tasks for the Microsoft® Windows® Operating System (OS).

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<?php

error_reporting(0);
ini_set("xdebug.halt_level", "0");
ini_set("xdebug.force_error_reporting", "0");
ini_set("xdebug.force_display_errors", "0");

const HHVM_PHP_INI = "/etc/hhvm/php.ini";
const HHVM_SERVER_INI = "/etc/hhvm/server.ini";

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Get/set ID3 meta tags using ffmpeg

A quick guide on how to read/write/modify ID3 metadata tags for audio / media files using ffmpeg.

FFmpeg has a free-form command line option that allows the user to specify key-value-pairs for encoding metadata. Let's take a look.

1. Read ID3 metadata

To list all global metadata tags for a media file, just set an input but no output file.

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<?php

// Function `parse_yturl()` from <http://stackoverflow.com/a/10524505/624466>

/**
 *  Check if the input string is a valid YouTube URL
 *  and try to extract the YouTube Video ID from it.
 * 
 *  @author  Stephan Schmitz <[email protected]>
 *  @param   $url   string   The string that shall be checked.