screencapture.sh

#!/bin/bash

declare -r vout_dir="${0%/*}"
declare -r time_stamp="$(date +'%Y%m%d%H%M%S')"
declare -r file_name="recording-${time_stamp}"
declare -i capture_x_offset=0

# Check if both monitors are active
if [ "$(xrandr | head -n 1 | sed 's/.*current\ \([0-9]*\)\ .*/\1/')" = "3840" ]
then
    # Only capture the right monitor
    capture_x_offset=1920
fi

if which avconv >/dev/null
then
    # http://wiki.oz9aec.net/index.php/High_quality_screen_capture_with_avconv
    avconv -f alsa -ac 2 -ar 44100 -i pulse -f x11grab -r 25 -s 1920x1080 \
        -i :0.0+${capture_x_offset},0 -acodec libvorbis -vcodec libx264 \
        -pre:0 lossless_ultrafast -threads auto "${file_name}.mkv"
elif which ffmpeg >/dev/null
then
    # http://wiki.oz9aec.net/index.php/High_quality_screen_capture_with_Ffmpeg
    ffmpeg -f alsa -i pulse -f x11grab -r 25 -s 1920x1080 \
        -i :0.0+${capture_x_offset},0 -acodec pcm_s16le -vcodec libx264 \
        -vpre lossless_ultrafast -threads 0 "${file_name}.mkv"
elif which recordmydesktop > /dev/null
then
    recordmydesktop -x 0 -y 0 --width 1920 --height 1080 --full-shots \
        --channels 2 --freq 44100 --device pulse \
        --on-the-fly-encoding --s_quality 10 --no-frame -o "${file_name}.ogv"
fi