scwrypts/zsh/media/youtube/get-audio-clip

#!/bin/zsh
use media/youtube
#####################################################################

MAIN() {
	local URLS=($@)

	[[ ${#URLS[@]} -eq 0 ]] && URLS=($(echo '' | FZF_USER_INPUT 'enter URL'))
	[[ ${#URLS[@]} -eq 0 ]] && ABORT

	local FILENAME=$(YT__GET_FILENAME $URLS)
	[ ! $FILENAME ] && ERROR "unable to download '$URLS'"

	INPUT_FILE="$YT__OUTPUT_DIR/$FILENAME"

	[ ! -f "$INPUT_FILE" ] && {
		SCWRYPTS__RUN youtube/download -- $URLS || return 1
	}

	SUCCESS "video download '$FILENAME' detected!"

	LENGTH=$(GET_VIDEO_LENGTH "$INPUT_FILE")
	[ ! $LENGTH ] && { ERROR "unable to determine video length for '$INPUT_FILE'"; return 2; }
	START_TIME=$(echo 0 | FZF_USER_INPUT "enter start time (0 ≤ t < $LENGTH)")
	[ ! $START_TIME ] && ABORT
	END_TIME=$(echo $LENGTH | FZF_USER_INPUT "enter end time ($START_TIME > t ≥ $LENGTH)")
	[ ! $END_TIME ] && ABORT

	STATUS
	STATUS "video      : $FILENAME"
	STATUS "start time : $START_TIME"
	STATUS "end time   : $END_TIME"
	STATUS
	OUTPUT_FILE=$(echo '' \
		| FZF_USER_INPUT 'what should I call this clip? (.mp3)' \
		| sed 's/\.mp3$//' \
	)
	[ ! $OUTPUT_FILE ] && ABORT
	OUTPUT_FILE="$YT__OUTPUT_DIR/$OUTPUT_FILE.mp3"

	ffmpeg -i "$INPUT_FILE" -q:a 0 -map a \
		-ss $START_TIME -t $(($END_TIME - $START_TIME))\
		"$OUTPUT_FILE" \
		&& SUCCESS "created clip '$OUTPUT_FILE'" \
		|| { ERROR "error creating clip '$(basename $OUTPUT_FILE)' (see above)"; return 3; }
}