#!/usr/bin/env bash

# sf
sfdesc="Extract a part of a file."
sfargs+=("FILE;File which will be cutted")
sfargs+=("from;f;TIMESTAMP/SECONDS;0;Extract from TIMESTAMP/SECONDS")
sfargs+=("out;o;FILE;cutted_<filename>;Save extracted part to FILE")
sfargs+=("to;t;TIMESTAMP/DURATION;end;Extract to TIMESTAMP/DURATION")
sfexamples+=("ffcut -t 5 video.mp4 -o cut.webm;Extract the first five seconds of 'video.mp4' to 'cut.webm'")
sfexamples+=("ffcut -f 00:10:30 -t 00:14:15 video.mp4;Extract the part from 00:10:30 to 00:14:15 from 'video.mp4'")
sfdeps=("ffmpeg")

source "$(dirname $0)/../lib/sf"

# Handle missing parameters
[ "$from" == 0 ] && [ "$to" == "end" ] && sferr "Set at least ${sftbf}--from${sftrs} or ${sftbf}--to${sftrs}"

# Set default value for output file
[ "$out" == "cutted_<filename>" ] && out="$(dirname "$FILE")/cutted_$(basename "$FILE")"

# Set additional ffmpeg arguments
args=()
[ "$to" != "end" ] && args+=("-to" "$to")
[ "${FILE##*.}" == "${out##*.}" ] && args+=("-c" "copy")

# Execute ffmpeg
echo "Cutting file ${sftbf}$(basename "$FILE")${sftrs}"
ffmpeg -hide_banner -loglevel error -i "$FILE" -ss "$from" "${args[@]}" "$out"

[ "$?" == "0" ] && echo "The extracted part was saved to ${sftbf}$out${sftrs}"