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protrolium /
Created Jan 13, 2019
imagemagick + ghostscript to covert PDFs to PNG (high quality)

$ convert -verbose -density 150 -trim document.pdf -quality 100 -sharpen 0x1.0 PDF-IMAGES/image.png


I decided that I wanted to use aliases to quickly navigate to directories.
Inside a directory I have called scripts I create each one:

nano myAlias

# file : /scripts/myAlias
cd /directory/that/i/want

protrolium /
Last active Nov 24, 2018
Dorico Keyboard Shortcuts

Dorico | default keybindings

adjust octave
command + option + up/down arrow key

adjust note rhythmic value
shift option left right arrow key

shift note (or staff object i.e. clef) forwards/backwards
option left right arrow key

protrolium / bitmarkClaiming
Created Apr 19, 2017
Claiming of Bitmark account
View bitmarkClaiming
Publicly linking my Bitmark account /
protrolium /
Last active Nov 24, 2018
using ffmpeg to add sound to youtube videos

quick/dirty process to merge audio streams

create initial video offset
ffmpeg -ss 0:00 -t 0:00 -i input.mp4 output.mp4

exctract audio from new output.mp4
ffmpeg -i output.mp4 -f mp3 -ab 192000 -vn output.mp3

merge the two audio files
ffmpeg -i output.mp3 -i audio2.mp3 -filter_complex amerge -ac 2 -c:a libmp3lame -q:a 4 merged.mp3


$ cd /usr/local/bin
$ sudo nano [scriptname]

command goes here

exit and save

sudo chmod +x [scriptname] to make executable

protrolium /
Last active Aug 30, 2016
Keyboad Shortcuts | Sibelius 6 | OS X 10.6.8

Command + Option + Up/Down Arrow
Jump up/down systems

Option + Shift + Left/Right Arrow
Adjust spacing of note

Tab / Tab + Shift
Tab through objects in current staff … use to toggle Dynamic markings

Shift + Left/Right Arrow to select, then Option + Shift + Up/Down Arrow

protrolium / working with
Last active Jun 10, 2016
zip terminal command
View working with

zip a directory for windows by removing .DS_Store

zip -r foo -x "*.DS_Store"

To interpret this, we are running the zip executable with the following parameters/arguments:

  • -r for recursively including all directories underneath the targets we want to zip.
  • is the name of the zip archive we are creating
  • foo is the target directory we want to zip up
  • -x "*.DS_Store" excludes all files whose path ends in the string ".DS_Store"
protrolium /
Last active Apr 5, 2018
Renoise : Keyboard Shortcuts

Renoise 3.0

Keyboard Shortcuts OS X 10.10.5

play from playhead position
shift space bar

toggle FOLLOW in pattern view [custom keybinding]
option esc

toggle global loop [custom keybinding]

protrolium /
Last active Dec 5, 2019
convert images to GIF in Terminal

Install ImageMagick

brew install ImageMagick

Pull specific region of frames from video file w/ ffmpeg

ffmpeg -ss 14:55 -i video.mkv -t 5 -s 480x270 -f image2 %04d.png

  • -ss 14:55 gives the timestamp where I want FFmpeg to start, as a duration string.
  • -t 5 says how much I want FFmpeg to decode, using the same duration syntax as for -ss.
  • -s 480x270 tells FFmpeg to resize the video output to 480 by 270 pixels.
  • -f image2 selects the output format, a series of still images — make sure there are leading zeros in filename.
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