dac.sh - grabber v3

#!/bin/bash
# dac.sh - Download And Convert script (Grabber 3.0)
# This script downloads videos from a provided URL and converts them to the x265 (HEVC) format using yt-dlp and ffmpeg.
# It supports input directly as a command-line argument, from the clipboard, or from the current text selection.
# The script allows specifying the output filename or directory for the converted video using the -o flag.
#
# Version: 3.0
# Date: 2024-04-07
# Author: Subbass
# Requirements: yt-dlp, ffmpeg, xclip
# Usage:
#   ./dac.sh [URL] - Downloads and converts the video at [URL], saving it with the original filename.
#   ./dac.sh [URL] -o <output_file> - Downloads and converts the video at [URL], saving it as <output_file>.
#   ./dac.sh - If no URL is provided, the script checks the clipboard and primary selection for a valid URL.
#
# Changelog:
#   v1.0 - Initial release.
#   v1.1 - Added conversion to x265, replacing the original file.
#   v1.2 - Added support for checking both clipboard and primary selection for URLs.
#   v1.3 - Refined script documentation and added versioning and date information.
#   v2.0 - Added support for specifying output filename/directory using -o flag.
#         - Renamed files using yt-dlp -o option and passed it to ffmpeg for consistency.
#   v2.1 - Corrected handling of -o flag and parameters.
#   v2.2 - Fix file name handling
#   v2.21- Fix "noiseyness" of output
#   v3.0 - Integrated error handling for yt-dlp with long filenames and updated temporary directory handling for performance.

download_and_convert() {
  local url="$1"
  local output_file="$2"
  echo "Downloading from: $url"

  # Define and use a temporary directory for the download and conversion process.
  local temp_dir=$(mktemp -d "~/temp_video_download_XXXXXX")
  echo "Temp folder at: $temp_dir"
  pushd "$temp_dir" > /dev/null

  # Attempt to download the video file, handling long filename error.
  if [[ -z "$output_file" ]]; then
    yt-dlp --quiet --progress -w "$url" -o "%(title)s.%(ext)s"
  else
    yt-dlp --quiet --progress -w "$url" -o "${output_file}.%(ext)s"
  fi

  if [ $? -ne 0 ]; then
    echo "Download failed, possibly due to a long filename."
    echo "Please enter a new filename (without extension):"
    read -r new_filename
    if [[ -z "$output_file" ]]; then
      yt-dlp --quiet --progress -w "$url" -o "${new_filename}.%(ext)s"
    else
      yt-dlp --quiet --progress -w "$url" -o "${new_filename}.%(ext)s"
      output_file="${new_filename}"
    fi
  fi

  local downloaded_file=$(find . -type f -printf "%f\n" | head -n 1)

  if [[ ! -f "$downloaded_file" ]]; then
    echo "Download failed or file not found: $downloaded_file"
    popd > /dev/null
    rm -rf "$temp_dir"
    return
  fi

  echo "Downloaded file: $downloaded_file"

  # Proceed with conversion if the file exists.
  echo "Converting to x265..."
  local new_file="${downloaded_file%.*}_x265.mp4"
  ffmpeg -hide_banner -i "$downloaded_file" -c:v libx265 -preset fast -x265-params crf=28 "$new_file" -loglevel warning -stats

  if [ -f "$new_file" ]; then
    # Move the final file to the original directory.
    mv "$new_file" ..
    echo "Conversion complete: $new_file"
  else
    echo "Conversion failed."
  fi

  # Cleanup
  popd > /dev/null
  rm -rf "$temp_dir"
}


get_url_from_clipboard_or_selection() {
  local url=$(xclip -o 2>/dev/null)
  if [[ $url =~ ^https?:// ]]; then
    echo $url
    return
  fi

  url=$(xclip -o -selection primary 2>/dev/null)
  if [[ $url =~ ^https?:// ]]; then
    echo $url
    return
  fi

  echo ""
}

if [ $# -eq 0 ]; then
  url=$(get_url_from_clipboard_or_selection)
  if [ -n "$url" ]; then
    download_and_convert "$url"
  else
    echo "No valid URL supplied, found in clipboard, or selected."
  fi
elif [[ "$1" == "-o" ]]; then
  if [[ $# -ne 3 ]]; then
    echo "Invalid usage of -o flag. Please provide a URL and a filename after -o."
    exit 1
  fi
  download_and_convert "$3" "$2"
else
  download_and_convert "$1"
fi