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#!/bin/bash
set -e
DIR="$( cd "$( dirname "$(realpath "${BASH_SOURCE[0]}")" )" &> /dev/null && pwd )"
PROGNAME="$0"
. "$DIR/lib.bash"
input=
output=
command=
ffmpeg_args="-nostats -loglevel error"
config_dir=$HOME/.config/video-util
config_dir_set=
usage() {
cat <<EOF
usage: $PROGNAME OPTIONS command
Options:
-i|--input FILE input file/directory
-o|--output FILE output file/directory
--name NAME camera name, affects config directory.
default is $config_dir, specifying --name will make it
${config_dir}-\$name
-v, -vv, vx be verbose.
-v enables debug logs.
-vv also enables verbose output of ffmpeg.
-vx does \`set -x\`, may be used to debug the script.
Commands:
snapshot take video snapshot
EOF
exit 1
}
check_input_file() {
[ -z "$input" ] && die "input file not specified"
[ -f "$input" ] || die "input file '$input' doesn't exist"
}
check_input_dir() {
[ -z "$input" ] && die "input directory not specified"
[ -d "$input" ] || die "input directory '$input' doesn't exist"
}
[[ $# -lt 1 ]] && usage
while [[ $# -gt 0 ]]; do
case $1 in
snapshot)
command="$1"
shift
;;
-i|--input)
input="$2"
shift; shift
;;
-o|--output)
output="$2"
shift; shift
;;
-v)
verbose=1
shift
;;
-vx)
verbose=1
set -x
shift
;;
-vv)
verbose=1
ffmpeg_args="-loglevel info"
shift
;;
--name)
config_dir="$config_dir-$2"
config_dir_set=1
shift; shift
;;
*)
die "unrecognized option $1"
exit 1
;;
esac
done
if [ -z "$config_dir_set" ]; then
echowarn "no --name specified, using default ($config_dir)"
else
if [ ! -d "$config_dir" ]; then
mkdir "$config_dir" || die "failed to create config directory ($config_dir)"
fi
>&2 echo "using ${BOLD}$config_dir${RST} as config directory"
fi
[ -z "$command" ] && die "command not specified"
case "$command" in
snapshot)
check_input_file
[ -z "$output" ] && {
echowarn "--output not specified, using snapshot.jpg as default"
output="snapshot.jpg"
}
ffmpeg $ffmpeg_args -i "$input" -frames:v 1 -q:v 2 "$output" </dev/null
echoinfo "saved to $output"
;;
*)
echo "error: invalid command '$command'"
;;
esac
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