Used to obtain GIF image information

gif_info.sh

function gifinfo() {
  # 检查是否安装了 ImageMagick
  if ! command -v identify &>/dev/null; then
    echo -e "\033[31mError: ImageMagick is not installed.\033[0m"
    return 1
  fi

  local num_frames=-1
  local filename=""

  # 解析参数
  while [[ $# -gt 0 ]]; do
    case $1 in
    -n)
      shift
      if [[ $# -gt 0 ]]; then
        num_frames=$1
      else
        echo -e "\033[31mError: -n requires a number argument.\033[0m"
        return 1
      fi
      ;;
    -*)
      echo -e "\033[31mUsage: gifduration [-n number_of_frames] <filename>\033[0m"
      return 1
      ;;
    *)
      filename=$1
      ;;
    esac
    shift
  done

  if [ -z "$filename" ]; then
    echo -e "\033[31mUsage: gifinfo [-n number_of_frames] <filename>\033[0m"
    return 1
  fi

  # 确定临时目录
  if [[ "$OSTYPE" == "darwin"* || "$OSTYPE" == "linux-gnu"* ]]; then
    temp_dir="/tmp"
  elif [[ "$OSTYPE" == "msys" || "$OSTYPE" == "cygwin" ]]; then
    temp_dir="$TEMP"
  else
    echo "Error: Unsupported operating system."
    return 1
  fi

  # 如果 filename 是 URL，下载到本地
  if [[ "$filename" == http* ]]; then
    local timestamp=$(date +%s%3N)
    local temp_filename="${temp_dir}/gifinfo_temp_${timestamp}.gif"
    curl -sL "$filename" -o "$temp_filename" || {
      echo -e "\033[31mError: Failed to download GIF from $filename.\033[0m"
      return 1
    }
    filename="$temp_filename"
  fi

  # https://imagemagick.org/script/escape.php
  local info=$(magick identify -format "%w,%h,%s,%T,%n\n" "$filename")

  # 文件大小
  local filesize
  if [[ "$OSTYPE" == "darwin"* ]]; then
    filesize=$(stat -f%z "$filename")
  else
    filesize=$(stat -c%s "$filename")
  fi

  local filesize_kb=$(echo "scale=2; $filesize / 1024" | bc)
  local filesize_mb=$(echo "scale=2; $filesize / 1048576" | bc)
  local filesize_display

  if (($(echo "$filesize_mb >= 1" | bc -l))); then
    filesize_display="${filesize_mb}MB"
  else
    filesize_display="${filesize_kb}KB"
  fi
  echo -e "\033[1mSize: \033[32m${filesize_display}\033[0m"

  # 宽高
  local dimensions=$(echo "$info" | awk -F ',' '{if($1>w) w=$1; if($2>h) h=$2} END {print w "×" h}')
  echo -e "\033[1mDimensions: \033[32m${dimensions}\033[0m"

  # 总时长
  local duration=$(echo "$info" | awk -F ',' '{sum+=$4} END {print sum/100}')
  echo -e "\033[1mDuration: \033[32m${duration}s\033[0m"

  # 总帧数
  local total_frames=$(echo "$info" | head -n 1 | awk -F ',' '{print $5}')
  echo -e "\033[1mFrames: \033[32m${total_frames}\033[0m"

  # 每帧 delay time
  echo -e "\033[1mFrame delays:\033[0m"
  if [ "$num_frames" -gt 0 ]; then
    echo "$info" | head -n "$num_frames" | awk -F ',' '{printf "  \033[2m#%d:\033[0m \033[32m%.2fs\033[0m\n", NR-1, $4/100}'

    local remaining_frames=$((total_frames - num_frames))
    if [ "$remaining_frames" -gt 0 ]; then
      local remaining_duration=$(echo "$info" | tail -n "$remaining_frames" | awk -F ',' '{sum+=$4} END {print sum/100}')
      echo -e "\033[2m  ${remaining_frames} frames (${remaining_duration}s in total) are not displayed.\033[0m"
    fi
  else
    echo "$info" | awk -F ',' '{printf "  \033[2m#%d:\033[0m \033[32m%.2fs\033[0m\n", NR-1, $4/100}'
  fi

  # 删除临时文件
  if [[ "$filename" == "${temp_dir}/"* ]]; then
    rm -f "$filename"
  fi
}

Add this to your .bash_profile or .zshrc, then source it.

$ gifinfo [-n number_of_frames] <filename>

The filename supports local or network image.