AUTOMATION with FFMPEG

Sample (without API of ChatGPT (pay for)).

#!/bin/ksh

############################################
input_video="input.mp4"
output_video="output_with_k.mp4"
watermark_text="КR"
font_size=100
font_color="white"
font_file="Arial"
watermark_x=50
watermark_y=50
audio_description_prompt="dsgddfgdfdgfg bbbdfbd"
generated_audio_file="generated_audio.mp3"

#0
watermark_image="watermark_k.png"
echo "Generating with letter K '$watermark_text'..."
gm convert -background none -fill "$font_color" -font "$font_file" -pointsize "$font_size" label:"$watermark_text" "$watermark_image"
if [ $? -ne 0 ]; then
  echo "Error genereating watermark"
  exit 1
fi
echo "Image for watermark  '$watermark_image' created"

#1
echo "adding to video '$input_video'..."
ffmpeg -i "$input_video" -i "$watermark_image" -filter_complex "overlay=x=$watermark_x:y=$watermark_y" -c:a copy "video_with_watermark.mp4"
if [ $? -ne 0 ]; then
  echo "error"
  rm -f "$watermark_image"
  exit 1
fi
echo "1th step of video: video_with_watermark.mp4"

The sample of my new script: 

./finale.ksh  -size 122  -i input.mp4 -label sdfds  -shadow -x 250 -y 250 -font Helvetica -wave -color white
The result:

This is a shell script (.ksh) designed to add a text watermark to a video file. It utilizes two command-line tools:

1. GraphicsMagick (gm convert, gm composite): Used to generate the watermark image with optional shadow and wave effects.
2. FFmpeg (ffmpeg): Used to overlay the generated watermark image onto the input video.

Key functionalities:

• Takes input video and watermark text as mandatory arguments.
• Offers several optional parameters:
  • -font: Specifies the font for the text watermark.
  • -color: Sets the color of the text.
  • -size: Controls the size of the text.
  • -shadow: Enables a shadow effect behind the text.
  • -wave: Applies a wave distortion effect to the text.
  • -x and -y: Define the position of the watermark on the video.
• Lists available fonts using the --help fonts option.
• Generates a PNG image of the text watermark (with shadow and wave if enabled) using GraphicsMagick.
• Overlays the generated PNG image onto the input video using FFmpeg.
• Outputs the watermarked video to a file named output_with_wm.mp4.
• Handles errors such as missing mandatory arguments or failures in image generation or video processing.
• Cleans up by removing the temporary watermark image file after processing.

In essence, the script automates the process of creating a text-based watermark with optional visual enhancements and embedding it into a video file.

#!/bin/ksh


# --- Default parameters ---

input_video=""
watermark_text=""
selected_font="Arial"
text_color="white"
text_size=50
enable_shadow=0
enable_wave=0
watermark_x=10
watermark_y=10


# --- Function to list available fonts ---
list_fonts() {
  echo "Avaiable Fonts:"
  fc-list | awk -F: '{print $1}' | sort -u
}


# --- Argument processing ---
while [ $# -gt 0 ]; do
  case "$1" in
    -i)
      if [ $# -gt 1 ]; then
        input_video="$2"
        shift 2
      else
        echo "Error: Expected filename after -i."
        exit 1
      fi
      ;;
    -label)
      if [ $# -gt 1 ]; then
        watermark_text="$2"
        shift 2
      else
        echo "Error: Expected text after -label."
        exit 1
      fi
      ;;
    -font)
      if [ $# -gt 1 ]; then
        selected_font="$2"
        shift 2
      else
        echo "Error: Expected font name after -font."
        exit 1
      fi
      ;;
    -color)
      if [ $# -gt 1 ]; then
        text_color="$2"

        shift 2

      else

        echo "Error: Expected color after -color."

        exit 1

      fi

      ;;

    -size)

      if [ $# -gt 1 ]; then

        text_size="$2"

        shift 2

      else

        echo "Error: Expected size after -size."

        exit 1

      fi

      ;;

    -shadow)

      enable_shadow=1

      shift

      ;;

    -wave)

      enable_wave=1

      shift

      ;;

    -x)

      if [ $# -gt 1 ]; then

        watermark_x="$2"

        shift 2

      else

        echo "Error: Expected value after -x."

        exit 1

      fi

      ;;

    -y)

      if [ $# -gt 1 ]; then

        watermark_y="$2"

        shift 2

      else

        echo "Error: Expected value after -y."

        exit 1
      fi
      ;;

    --help)
      case "$2" in
        fonts)
          list_fonts
          exit 0
          ;;

        *)

          echo "Usage: $0 -i <input_video> -label \"text\" [options]"
          echo "Options: -font <font_name>, -color <color>, -size <size>, -shadow, -wave, -x <number>, -y <number>"
          echo "           $0 --help fonts"
          exit 0

          ;;
      esac
      exit 0
      ;;

    *)

      echo "Unknown parameter: '$1'"
      echo "Usage: $0 -i <input_video> -label \"text\" [options]"
      echo "           $0 --help fonts"
      exit 1
      ;;
  esac

done


# --- Check for mandatory parameters ---

if [ -z "$input_video" ] || [ -z "$watermark_text" ]; then
  echo "Error: You must specify -i <input_video> and -label \"text\"."
  echo "Usage: $0 -i <input_video> -label \"text\" [options]"
  echo "           $0 --help fonts"
  exit 1
fi


# --- GraphicsMagick settings ---

watermark_text_safe=$(echo "$watermark_text" | sed 's/ /_/g')
watermark_image="watermark_${watermark_text_safe}_${selected_font}_${text_color}_${text_size}.png"
font_file="$selected_font"
shadow_color="#00000080" # Semi-transparent black

shadow_offset="+2+2"
wave_amplitude=5
wave_length=20
watermark_x_offset=0
watermark_y_offset=0

output_video="output_with_wm.mp4"

echo "Input video file: $input_video"
echo "Watermark text: $watermark_text"
echo "Font: $selected_font"
echo "Text color: $text_color"
echo "Text size: $text_size"
echo "Position (x, y): ($watermark_x, $watermark_y)"

if [ $enable_shadow -eq 1 ]; then
  echo "Shadow enabled."
fi

if [ $enable_wave -eq 1 ]; then
  gm convert "$watermark_image" -bordercolor none -border 10x10 -wave "$wave_amplitude"x"$wave_length" -trim "$watermark_image"
  echo "Wave effect enabled."
fi

# --- 1. Generating the image with text and effects using GraphicsMagick ---
echo "Generating image with text '$watermark_text' in font '$selected_font', color '$text_color', size '$text_size'..."

text_image="text_$watermark_image"
shadow_image="shadow_$watermark_image"
final_image="$watermark_image"

# Create image with main text
gm convert -background none -font "$font_file" -pointsize "$text_size" -fill "$text_color" label:"$watermark_text" "$text_image"

# Create shadow image (offset text)
if [ $enable_shadow -eq 1 ]; then
  gm convert -background none -font "$font_file" -pointsize "$text_size" -fill "#00000080" label:"$watermark_text" -bordercolor none -border 5x5 "$shadow_image"

  gm composite -geometry "+12+12" "$text_image" "$shadow_image" "$final_image"
else
  cp "$text_image" "$final_image"
fi

rm -f "$text_image" "$shadow_image"

if [ $? -ne 0 ]; then
  echo "Error generating watermark image."
  exit 1
fi

if [ $enable_wave -eq 1 ]; then
  gm convert "$watermark_image" -bordercolor none -border 200x200 "$watermark_image"
  gm convert "$watermark_image" -wave "$wave_amplitude"x"$wave_length" "$watermark_image"
  gm convert "$watermark_image" -trim "$watermark_image"
fi

# Trim the final image
gm convert "$final_image" -trim "$watermark_image"

echo "Watermark image '$watermark_image' created."

# --- 2. Adding the watermark to the video using FFmpeg ---
echo "Adding watermark to video '$input_video'..."
ffmpeg -i "$input_video" -i "$watermark_image" -filter_complex "overlay=x=$watermark_x:y=$watermark_y" -c:a copy "$output_video"


if [ $? -ne 0 ]; then
  echo "Error adding watermark to video."
  rm -f "$watermark_image"
  exit 1
fi

echo "Watermark added. Output file: $output_video"
rm -f "$watermark_image"


echo "Script finished."


exit 0

The sample of my new script: 

./finale.ksh  -size 122  -i input.mp4 -label sdfds  -shadow -x 250 -y 250 -font Helvetica -wave -color white
The result:

This is a shell script (.ksh) designed to add a text watermark to a video file. It utilizes two command-line tools:

1. GraphicsMagick (gm convert, gm composite): Used to generate the watermark image with optional shadow and wave effects.
2. FFmpeg (ffmpeg): Used to overlay the generated watermark image onto the input video.

Key functionalities:

• Takes input video and watermark text as mandatory arguments.
• Offers several optional parameters:
  • -font: Specifies the font for the text watermark.
  • -color: Sets the color of the text.
  • -size: Controls the size of the text.
  • -shadow: Enables a shadow effect behind the text.
  • -wave: Applies a wave distortion effect to the text.
  • -x and -y: Define the position of the watermark on the video.
• Lists available fonts using the --help fonts option.
• Generates a PNG image of the text watermark (with shadow and wave if enabled) using GraphicsMagick.
• Overlays the generated PNG image onto the input video using FFmpeg.
• Outputs the watermarked video to a file named output_with_wm.mp4.
• Handles errors such as missing mandatory arguments or failures in image generation or video processing.
• Cleans up by removing the temporary watermark image file after processing.

In essence, the script automates the process of creating a text-based watermark with optional visual enhancements and embedding it into a video file.

#!/bin/ksh


# --- Default parameters ---

input_video=""
watermark_text=""
selected_font="Arial"
text_color="white"
text_size=50
enable_shadow=0
enable_wave=0
watermark_x=10
watermark_y=10


# --- Function to list available fonts ---
list_fonts() {
  echo "Avaiable Fonts:"
  fc-list | awk -F: '{print $1}' | sort -u
}


# --- Argument processing ---
while [ $# -gt 0 ]; do
  case "$1" in
    -i)
      if [ $# -gt 1 ]; then
        input_video="$2"
        shift 2
      else
        echo "Error: Expected filename after -i."
        exit 1
      fi
      ;;
    -label)
      if [ $# -gt 1 ]; then
        watermark_text="$2"
        shift 2
      else
        echo "Error: Expected text after -label."
        exit 1
      fi
      ;;
    -font)
      if [ $# -gt 1 ]; then
        selected_font="$2"
        shift 2
      else
        echo "Error: Expected font name after -font."
        exit 1
      fi
      ;;
    -color)
      if [ $# -gt 1 ]; then
        text_color="$2"

        shift 2

      else

        echo "Error: Expected color after -color."

        exit 1

      fi

      ;;

    -size)

      if [ $# -gt 1 ]; then

        text_size="$2"

        shift 2

      else

        echo "Error: Expected size after -size."

        exit 1

      fi

      ;;

    -shadow)

      enable_shadow=1

      shift

      ;;

    -wave)

      enable_wave=1

      shift

      ;;

    -x)

      if [ $# -gt 1 ]; then

        watermark_x="$2"

        shift 2

      else

        echo "Error: Expected value after -x."

        exit 1

      fi

      ;;

    -y)

      if [ $# -gt 1 ]; then

        watermark_y="$2"

        shift 2

      else

        echo "Error: Expected value after -y."

        exit 1
      fi
      ;;

    --help)
      case "$2" in
        fonts)
          list_fonts
          exit 0
          ;;

        *)

          echo "Usage: $0 -i <input_video> -label \"text\" [options]"
          echo "Options: -font <font_name>, -color <color>, -size <size>, -shadow, -wave, -x <number>, -y <number>"
          echo "           $0 --help fonts"
          exit 0

          ;;
      esac
      exit 0
      ;;

    *)

      echo "Unknown parameter: '$1'"
      echo "Usage: $0 -i <input_video> -label \"text\" [options]"
      echo "           $0 --help fonts"
      exit 1
      ;;
  esac

done


# --- Check for mandatory parameters ---

if [ -z "$input_video" ] || [ -z "$watermark_text" ]; then
  echo "Error: You must specify -i <input_video> and -label \"text\"."
  echo "Usage: $0 -i <input_video> -label \"text\" [options]"
  echo "           $0 --help fonts"
  exit 1
fi


# --- GraphicsMagick settings ---

watermark_text_safe=$(echo "$watermark_text" | sed 's/ /_/g')
watermark_image="watermark_${watermark_text_safe}_${selected_font}_${text_color}_${text_size}.png"
font_file="$selected_font"
shadow_color="#00000080" # Semi-transparent black

shadow_offset="+2+2"
wave_amplitude=5
wave_length=20
watermark_x_offset=0
watermark_y_offset=0

output_video="output_with_wm.mp4"

echo "Input video file: $input_video"
echo "Watermark text: $watermark_text"
echo "Font: $selected_font"
echo "Text color: $text_color"
echo "Text size: $text_size"
echo "Position (x, y): ($watermark_x, $watermark_y)"

if [ $enable_shadow -eq 1 ]; then
  echo "Shadow enabled."
fi

if [ $enable_wave -eq 1 ]; then
  gm convert "$watermark_image" -bordercolor none -border 10x10 -wave "$wave_amplitude"x"$wave_length" -trim "$watermark_image"
  echo "Wave effect enabled."
fi

# --- 1. Generating the image with text and effects using GraphicsMagick ---
echo "Generating image with text '$watermark_text' in font '$selected_font', color '$text_color', size '$text_size'..."

text_image="text_$watermark_image"
shadow_image="shadow_$watermark_image"
final_image="$watermark_image"

# Create image with main text
gm convert -background none -font "$font_file" -pointsize "$text_size" -fill "$text_color" label:"$watermark_text" "$text_image"

# Create shadow image (offset text)
if [ $enable_shadow -eq 1 ]; then
  gm convert -background none -font "$font_file" -pointsize "$text_size" -fill "#00000080" label:"$watermark_text" -bordercolor none -border 5x5 "$shadow_image"

  gm composite -geometry "+12+12" "$text_image" "$shadow_image" "$final_image"
else
  cp "$text_image" "$final_image"
fi

rm -f "$text_image" "$shadow_image"

if [ $? -ne 0 ]; then
  echo "Error generating watermark image."
  exit 1
fi

if [ $enable_wave -eq 1 ]; then
  gm convert "$watermark_image" -bordercolor none -border 200x200 "$watermark_image"
  gm convert "$watermark_image" -wave "$wave_amplitude"x"$wave_length" "$watermark_image"
  gm convert "$watermark_image" -trim "$watermark_image"
fi

# Trim the final image
gm convert "$final_image" -trim "$watermark_image"

echo "Watermark image '$watermark_image' created."

# --- 2. Adding the watermark to the video using FFmpeg ---
echo "Adding watermark to video '$input_video'..."
ffmpeg -i "$input_video" -i "$watermark_image" -filter_complex "overlay=x=$watermark_x:y=$watermark_y" -c:a copy "$output_video"


if [ $? -ne 0 ]; then
  echo "Error adding watermark to video."
  rm -f "$watermark_image"
  exit 1
fi

echo "Watermark added. Output file: $output_video"
rm -f "$watermark_image"


echo "Script finished."


exit 0