ffpostclip

#!/usr/bin/env bash

# ffpostclip: Remove the end of a video.

set -eo pipefail

function help {
    echo "Usage: ffpostclip <input> <timestamp> <output>"
    exit
}

function installed {
    cmd=$(command -v "${1}")

    [[ -n "${cmd}" ]] && [[ -f "${cmd}" ]]
    return ${?}
}

[[ $# -eq 3 && -f $1 && -n $2 && ! -f $3 ]] || help
installed ffmpeg || { >&2 echo "Missing ffmpeg."; exit 1; }

# remove `-c copy` if your format needs re-encoding
ffmpeg -t "${2}" -i "${1}" -c copy "${3}"