ffrec.sh

#!/bin/sh

# this bit came from youtube.com/watch?v=_XDa1ahl7fw
INFO=$(xwininfo)
WIN_GEO=$(echo $INFO | grep -oEe 'geometry [0-9]+x[0-9]+' | grep -oEe '[0-9]+x[0-9]+')
WIN_XY=$(echo $INFO | grep -oEe 'Corners:\s+\+[0-9]+\+[0-9]+' | grep -oEe '[0-9]+\+[0-9]+' | sed -e 's/\+/,/' )

AUDIO_INPUT="-f alsa -i hw:0,0 -ac 2"
VIDEO_INPUT="-f x11grab -r 30 -s $WIN_GEO -i :0.0+$WIN_XY"
#AUDIO_CODEC="-acodec pcm_s16le"
AUDIO_CODEC="-acodec flac"
VIDEO_CODEC="-vcodec libx264 -vpre lossless_ultrafast"
EXTRA_OPTS="-async 100"
EXTRA_OPTS="$EXTRA_OPTS -threads 2"

# seems to make it laggier
#schedtool -I -e \
    ffmpeg \
        $AUDIO_INPUT $VIDEO_INPUT \
        $AUDIO_CODEC $VIDEO_CODEC \
        $EXTRA_OPTS \
        -y screencap-$(date +%Y%m%d-%H%M%S).mkv