Screen Recording Script

#!/bin/sh
# This is macOS focused, on other systems
# you need to change -f avfoundation to
# Linux: x11grab
# Windows: gdigrab  all displays as one
#          dshow    discrete recording

# Check for screen to record from via:
# ffmpeg -f avfoundation -list_devices true -i ""
# And set it after -i (my screen is 0)
# To add audio, set the audio device after it
# Example -i (0.1)

# Screen recording is ended with CTRL+C
# Script is used as: scriptname filename
# Output is without audio
# To add audio change
# Matroska suffix is added for convenience,
# change it if you like.
# FFMPEG via Homebrew. http://brew.sh


outfile=$1

ffmpeg  -video_size 2560x1440 \
    -framerate 30 \
    -pix_fmt 0rgb \
    -f avfoundation \
    -i 0 \
    -c:v libx264rgb \
    -crf 0 \
    -preset ultrafast \
    -color_range 2 \
    $outfile.mkv