playlist-stitch: Downloads all files in an m3u playlist and stitches them together into a single .mpg file

playlist-stitch.sh

#!/bin/bash

declare -a req=("wget" "basename" "rm" "cat" "echo")

for cmd in "${req[@]}"
do 
    command -v $cmd >/dev/null 2>&1 || { echo "Required command not found: $cmd"; exit 1; }
done

[ $1 ] || { echo "Usage: $0 file1 [file2] [file3...]"; }

for file in "$@"
do

    if [ -f "$file" ]; then

        # Filename of current input file.
        infile=$(basename "$file")

        # Filename of current input file without extension.
        name="${infile%.*}"

        # Output filename.
        outfile="${name}.mpg"

        echo -e "Input: ${infile} Output: ${outfile}"
        echo -e "==================================="

        # Generate filename for temporary files.
        urls="urls_$name"
        
        # Store the urls of each file.
        grep -v '#' < "$file" > "$urls"

        # Counters
        i=1
        lc=$((wc -l < "$urls") | sed 's/^ *//')

        while read line
        do
            tmpfile=$(basename "$line")
            
            echo -e ""
            echo -e "Downloading [$i of $lc] ${tmpfile}"
            wget -q --show-progress "$line"

            echo -e "Appending to output [$i of $lc]"
            cat $tmpfile >> "$outfile"
            i=$((i+1))
            rm $tmpfile

        done < "$urls"
        
        rm "$urls"
    else
        (>%2 echo "File '$file' not found.")
    fi
done

This works really great thank you so much for taking the time to post it!

Only thing for anyone else who finds this is just be sure your m3u is in LF not CRLF 😉