bennylope

How to Add a Watermark to Video

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.

amureki

# Adds 3-sec fading out title image before video.

# What's going on here: We get title.png image, loop it for 3 sec video, create 3 sec silence, get video.mp4 (framerate 25). Next, we add fade out filter on looped image video, after that we concat our image video, audio silence and main video into one. Easy peasy.

ffmpeg -loop 1 -framerate 25 -t 3 -i title.png -t 3 -f lavfi -i aevalsrc=0 -i video.mp4 -filter_complex '[0:0]fade=out:50:25:alpha=1[title]; [title][1:0][2:0][2:1] concat=n=2:v=1:a=1' output.mp4

teeparham

require 'rdoc'
converter = RDoc::Markup::ToMarkdown.new
rdoc = File.read(ARGV[0] || 'README.rdoc')
puts converter.convert(rdoc)

# ruby rdoc2md.rb > README.md
# ruby rdoc2md.rb ABC.rdoc > abc.md

luigi

#
# Before running:
#   $ gem install twitter
#
# Register a Twitter application to get auth credentials:
#   https://dev.twitter.com/apps
#
# To run:
#   $ ruby counter.rb upworthy.com 500
#

fabioyamate

# installing curb gem on Ubuntu require libcurl

sudo apt-get install libcurl3-dev

Or new version, but it conflicts if some libraries.

sudo apt-get install libcurl4-dev
(some other packages  libcurl4-openssl-dev libcurl4-gnutls-dev)

gem install curb