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:
Originall From: Posted 2015-05-29 http://ubwg.net/b/full-list-of-ffmpeg-flags-and-options | |
This is the complete list that’s outputted by ffmpeg when running ffmpeg -h full. | |
usage: ffmpeg [options] [[infile options] -i infile]… {[outfile options] outfile}… | |
Getting help: | |
-h — print basic options | |
-h long — print more options | |
-h full — print all options (including all format and codec specific options, very long) |
#!/bin/sh -e | |
# | |
# Usage: browser | |
# pipe html to a browser | |
# e.g. | |
# $ echo '<h1>hi mom!</h1>' | browser | |
# $ ron -5 man/rip.5.ron | browser | |
if [ -t 0 ]; then | |
if [ -n "$1" ]; then |
I've done the same process every couple years since 2013 (Mountain Lion, Mavericks, High Sierra, Catalina) and I updated the Gist each time I've done it.
I kinda regret for not using something like Boxen (or anything similar) to automate the process, but TBH I only actually needed to these steps once every couple years...
FFMPEG filters provide a powerful way to programmatically enhance or alter videos, and it’s fairly simple to add a watermark to a video using the overlay filter. The easiest way to install ffmpeg is to download a pre-built binary for your specific platform. Then you don’t have to worry about including and installing all the right dependencies and codecs you will be using.
Once you have ffmpeg installed, adding a watermark is as easy as passing your existing source through an overlay filter like so:
ffmpeg -i test.mp4 -i watermark.png -filter_complex "overlay=10:10" test1.mp4
Basically, we’re passing in the original video, and an overlay image as inputs, then passing it through the filter, and saving the output as test1.mp4.
#!/usr/bin/env python | |
# -*- coding: utf-8 -*- | |
import urllib2 | |
gh_url = 'https://api.github.com' | |
req = urllib2.Request(gh_url) | |
password_manager = urllib2.HTTPPasswordMgrWithDefaultRealm() |
// XPath CheatSheet | |
// To test XPath in your Chrome Debugger: $x('/html/body') | |
// http://www.jittuu.com/2012/2/14/Testing-XPath-In-Chrome/ | |
// 0. XPath Examples. | |
// More: http://xpath.alephzarro.com/content/cheatsheet.html | |
'//hr[@class="edge" and position()=1]' // every first hr of 'edge' class |
Wand==0.3.7, Python 3.4.3, OSX EI Capitan 10.11
when run from wand.image import Image
it throw errors:
ImportError: MagickWand shared library not found. You probably had not installed ImageMagick library. Try to install: brew install freetype imagemagick
ok, first I try this: