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@mmm
Last active July 19, 2019 19:03
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#!/bin/bash
#
# Screencast Capture for Linux
#
# This script uses `ffmpeg` to capture an hd1080 screencast.
# The output is # organized by `scene->shot->take` and saves files into
#
# $(cwd)/
# -> ${scene_name}/
# -> shot-${shot_number}/
# -> take-${timestamp}/
# -> *.mkv
#
# Directories are created under the current directory as needed.
#
# Stop this manually with `Ctrl-c` when done
#
# Copyright and related rights waived via CC0
set -o errexit -o nounset -o pipefail
usage() {
echo "Usage: $0 <scene_name> [<shot_number>]
where:
<scene_name> is something like intro-what-is-data-eng
<shot_number> optional, default is 010"
}
(( $# < 1 )) && usage && exit 1
scene_name=$1
shot_number=${2:-010}
timestamp=`date +%Y-%m-%d-%H%M%S`
output_dir="${scene_name}/shot-${shot_number}/take-${timestamp}"
framerate=30
display=":0.0"
capture_demo() {
local output_dir=$1
ffmpeg \
-hide_banner -nostats -loglevel warning \
-f x11grab -r $framerate -s hd1080 -i ${display}+0,0 \
-vcodec libx264 \
-preset ultrafast \
$output_dir/demo.mkv > $output_dir/demo.log 2>&1
echo "demo done"
}
echo "starting ${scene_name}/shot-${shot_number}/take-${timestamp}"
mkdir -p $output_dir
echo "capturing demo - (Ctrl-c when done)"
capture_demo $output_dir &
for job in `jobs -p`; do
wait $job
done
echo "done"
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