vjk2005

gs -dNOPAUSE -dBATCH -sDEVICE=jpeg -dJPEGQ=100 -dGraphicsAlphaBits=4 -dTextAlphaBits=4 -r96 -sOutputFile='page-%00d.jpg' <input.pdf>
# r = resolution, here 96 = width 960px. properties with "AlphaBits" in them control smoothness of images and text

vjk2005

var jq = document.createElement('script');
jq.src = "https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js";
document.getElementsByTagName('head')[0].appendChild(jq);
jQuery.noConflict(); 

let main = () => {
  let next = $($('a:contains("Next 25 results")').toArray().pop()).attr('href')

  let process = data => {
    $('body dl').append($(data).find('dl').html())

vjk2005

sysctl -n machdep.cpu.brand_string
# run the following command to directly open a link to Intel's page on that processor for detailed specs:
# open http://ark.intel.com/search?q=$(sysctl -n machdep.cpu.brand_string | awk '{print $3}')

vjk2005

ffmpeg -i <input.mkv> -q:a 0 -map a output.mp3
# -q:a flag sets VBR encoding. 0 is hightest quality 320kbps.

vjk2005

#bsf filter is needed sometimes to take care of file format compatibility bullshit
ffmpeg -i video.mp4 -i audio.mp3 -bsf:a aac_adtstoasc -c copy -map 0:0 -map 1:0 output.mp4

#if audio is webm
ffmpeg -i video.mp4 -i audio.webm -c:v copy -c:a libvorbis -strict experimental -map 0:0 -map 1:0 output.mp4

vjk2005

ffmpeg -f concat -safe 0 -i files.txt -c copy output.mp4

# Note that files.txt must have the filenames of videos to be merged in the following format
# file 'path/filename.mp4'
# file 'path/filename.mp4'
# file 'path/filename.mp4'

vjk2005

find . -maxdepth 1 -iname '*.mp4' -exec ffprobe -v quiet -of csv=p=0 -show_entries format=duration {} \; | paste -sd+ -| bc

vjk2005

// put this inside a Run Javascript block in Automator

app.doJavaScript("var script = document.createElement('script'); script.src = 'https://ajax.googleapis.com/ajax/libs/jquery/1.6.3/jquery.min.js'; document.getElementsByTagName('head')[0].appendChild(script);", {
	in: app.windows[0].currentTab
})

delay(1); // wait for jQuery to load

//... jQuery is now loaded, now add the rest of the script

vjk2005

ffmpeg -i input.mkv -ss <start seconds (integer)> -to <end seconds (integer)> -c copy output.mkv

vjk2005

youtube-dl -ciw --restrict-filenames -o "/media/Scrape/youtube/mp3/%(upload_date)s-%(title)s.%(ext)s" --audio-format mp3 --audio-quality 0 --exec "ffmpeg -i {} -codec:a libmp3lame -qscale:a 0 {}.mp3 && rm {} " "<youtube URL>"