ts-download-v0.4.sh

#!/bin/bash

:<<'USAGE'
	$exrc		$urlp		$urls		$out
	$1		$2		$3		$4
 $0 Pratica3-Limite <URL_PLAYLIST> <URL_SEGMENT> <OUTPUT_MP4>
USAGE

exrc=$1
plstd="$exrc/playlist"

[[ -d "$plstd" ]] || mkdir -p "$plstd"

_urlp=$2 && urlp="https://$(cut -d '/' -f3-8 <<<${_urlp})"

plst="$plstd/playlist.m3u8" 
wget "$urlp" -O "$plst" -q --show-progress

[[ -f "$PWD/$plst" ]] && last_ts_number=$(grep -oP "^[^#].*-\K([0-9]+)" "$plst" | tail -1) \
	|| (echo "[!] File \"$plst\" not found." && exit 1)
        
_urls=$3 && urls="https://$(cut -d '/' -f3-8 <<<${_urls})"
chpd="$exrc/chop"
[[ -d "$chpd" ]] || mkdir "$chpd"

for i in $(seq 1 $last_ts_number); do
	tsf="segment-$i.ts"
	[[ -e "$chpd/$tsf" ]] && \
		(# TRUE: overwrite the ts file if it exists.
			echo "[-] The file already exists, so overwriting him: \"$tsf\"" \
			&& wget "$urls/$tsf" -O "$chpd/$tsf"  -q --show-progress
		) || ( 
		# FALSE: perform a regular ts file download.
		echo "[+] Downloading the file: segment-$i.ts" \
		&& wget "$urls/$tsf" -P "$chpd" -q --show-progress
	)
	case "$?" in
		1) echo "[!] An error occurred, turn debug on and check it. Program aborted."
			exit $?;;
	esac
done

[[ 0 -eq $? ]] && \
	(
		out=$4
		sed -i "/^#EXT/! s/^\(chop.*\)/file \'\.\.\/\1\'/g" "$plst" \
		&& ffmpeg -f concat -safe 0 -i "$plst" -c copy "$exrc/$out"
	)
#EOF

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