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.infinite-zoom{
  -webkit-animation: zoomSlow 60s infinite linear;
  -moz-animation: zoomSlow 60s infinite linear;
  animation: zoomSlow 60s infinite linear;
}

@-webkit-keyframes zoomSlow {
  0% {
    -moz-transform: scale(1);
    -webkit-transform: scale(1);

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RegEx Cheatsheet

Contents:

1. Special characters
2. Quantifiers
3. Special sequences
4. Useful examples

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1. copy your image (Ctrl+A and Ctrl+C)
2. make a new document-sized pure-black layer behind it
3. group the black layer and yor image together
4. add mask to the group
5. enter mask edit mode (alt+click on the mask icon/thumbnail)
6. paste your image in the mask (b/w) and then invert it.
7. save it as a 24-bit transparent PNG

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for i in **/*.mp4; do
    d=$(dirname "$i");
    b=$(basename "$i" .mp4);
    mkdir -p "720/${d}"
    ffmpeg -i "$i" -c:v libx264 -s hd720 "720/${d}/${b}_720.mp4"
done

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Originall From: http://ubwg.net/b/full-list-of-ffmpeg-flags-and-options | Posted 2015-05-29 
ffmpeg full documentation: https://ffmpeg.org/ffmpeg.html

----------------------------------------
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

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(Introduce yourself and thank the participant. Outline how the call will proceed. Emphasize that you want to hear their honest feedback, so they should think aloud and unfiltered as much as possible.)

PART 1: Desired Outcomes

Before we look at the site, I’d like to ask you just a few questions.

What’s your job title and what do you consider to be your most important responsibilities?

(Unpack their answer to understand the root of their responsibilities, their real "desired outcome"--that is, what they're trying to accomplish. For example, if they say "I'm responsible for maintaining data pipelines," dig deeper with questions like "Why is that important?" until you get at the heart of their responsibilities, like "My job is to ensure the integrity and auditability of the models that run our company." This might take a few follow-up questions to reach.)

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# To extract the sound from a video and save it as MP3:
ffmpeg -i <video.mp4> -vn <sound>.mp3

# To convert frames from a video or GIF into individual numbered images:
ffmpeg -i <video.mpg|video.gif> <frame_%d.png>

# To combine numbered images (frame_1.jpg, frame_2.jpg, etc) into a video or GIF:
ffmpeg -i <frame_%d.jpg> -f image2 <video.mpg|video.gif>

# To quickly extract a single frame from a video at time mm:ss and save it as a 128x128 resolution image:

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OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

• Open "Quicktime Player",
• Go to File -> New Screen Recording