snip.sh

#!/bin/bash

INFILE="$1"
OUT="$4"


if ! [[ -f $INFILE ]]; then
    echo "'$INFILE' is not a File."
    exit 1
elif [[ -z $OUT ]]; then
    echo "Need four arguments: Infile, start time, duration, and outfile."
    exit 1
fi

function panic() {
    echo "Operation cancelling." >&2
    exit 1
}


ffmpeg -hide_banner -loglevel warning -stats -avoid_negative_ts 1 \
    -ss "$2" -t "$3" -i "$INFILE" -map 0:v -map 0:a "$OUT" || panic


echo -n "Done. Size: " >&2
numfmt --to=iec-i --suffix=B --format="%.1f" $(stat -c '%s' "$OUT") >&2
readlink -f "$OUT"