Bash script to download all resources listed in an m3u file to the specified directory.

download_m3u.sh

#!/bin/bash

# This script downloads files specified by URIs in an M3U playlist file.
# It requires 'wget' to be installed on your system for downloading.

# --- Configuration ---
# Default output directory if not provided by the user.
DEFAULT_OUTPUT_DIR="./downloaded_media"

# --- Function to display usage information ---
usage() {
  echo "Usage: $0 -f <m3u_file_path> [-o <output_directory>]"
  echo "  -f <m3u_file_path> : Required. Path to the M3U playlist file."
  echo "  -o <output_directory> : Optional. Path to the directory where files will be downloaded."
  echo "                          Defaults to '$DEFAULT_OUTPUT_DIR' if not provided."
  exit 1
}

# --- Initialize variables ---
M3U_FILE=""
OUTPUT_DIR=""

# --- Parse command-line options ---
while getopts "f:o:" opt; do
  case ${opt} in
    f )
      M3U_FILE=$OPTARG
      ;;
    o )
      OUTPUT_DIR=$OPTARG
      ;;
    \? )
      usage
      ;;
  esac
done

# --- Validate required M3U file parameter ---
if [ -z "$M3U_FILE" ]; then
  echo "Error: M3U file path is required."
  usage
fi

# --- Set output directory default if not provided ---
if [ -z "$OUTPUT_DIR" ]; then
  OUTPUT_DIR="$DEFAULT_OUTPUT_DIR"
fi

# --- Check if M3U file exists ---
if [ ! -f "$M3U_FILE" ]; then
  echo "Error: M3U file not found at '$M3U_FILE'."
  exit 1
fi

# --- Check if wget is installed ---
if ! command -v wget &> /dev/null; then
  echo "Error: 'wget' is not installed. Please install it to use this script."
  echo "  On Debian/Ubuntu: sudo apt-get install wget"
  echo "  On macOS (with Homebrew): brew install wget"
  exit 1
fi

# --- Create output directory if it doesn't exist ---
if [ ! -d "$OUTPUT_DIR" ]; then
  echo "Creating output directory: '$OUTPUT_DIR'"
  mkdir -p "$OUTPUT_DIR"
  if [ $? -ne 0 ]; then
    echo "Error: Failed to create output directory '$OUTPUT_DIR'. Check permissions."
    exit 1
  fi
fi

echo "--- Starting download process ---"
echo "M3U File: '$M3U_FILE'"
echo "Output Directory: '$OUTPUT_DIR'"
echo "---------------------------------"

# --- Read URIs from M3U file and download them ---
# Using 'grep -v "^#"' to skip comment lines in the M3U file.
# Using 'while IFS= read -r uri' to handle lines with spaces correctly.
grep -v "^#" "$M3U_FILE" | while IFS= read -r uri; do
  # Skip empty lines
  if [ -z "$uri" ]; then
    continue
  fi

  echo "Attempting to download: '$uri'"
  # Use wget to download the URI to the specified output directory.
  # -P: specify directory prefix
  # -nc: no clobber (don't overwrite existing files)
  # -nv: no verbose (less output, just errors)
  wget -P "$OUTPUT_DIR" -nc -nv "$uri"
  
  if [ $? -eq 0 ]; then
    echo "  Successfully downloaded '$uri'"
  else
    echo "  Failed to download '$uri'"
  fi
  echo "" # Add a newline for better readability between downloads
done

echo "--- Download process completed ---"

Thanks Gemini 2.5 Flash!