Use Moviepy to fade in and fade out music on mp4

music_fade.py

from moviepy.editor import *
from moviepy.audio.fx.all import audio_fadein
from MUSIC import music

# Load video and audio clips
video_clip = VideoFileClip("/home/jack/Desktop/StoryMaker/static/images/Elektra-Weapons/Final_End.mp4")
audio_clip = AudioFileClip(music())

# Ensure the audio clip is the same duration as the video
if audio_clip.duration > video_clip.duration:
    audio_clip = audio_clip.subclip(0, video_clip.duration)
else:
    padding_duration = video_clip.duration - audio_clip.duration
    padding = AudioFileClip.silence(duration=padding_duration)
    audio_clip = concatenate_audioclips([audio_clip, padding])

# Define fade durations
fade_in_duration = 10  # seconds
fade_out_duration = 15  # seconds

# Apply fade in effect to audio
faded_audio = audio_clip.audio_fadein(fade_in_duration)

# Apply fade out effect to audio at the end
final_audio = faded_audio.audio_fadeout(fade_out_duration)

# Set audio of the video to the processed audio
video_with_audio = video_clip.set_audio(final_audio)

# Write the final video with audio to a file
output_path = "/home/jack/Desktop/StoryMaker/static/images/Elektra-Weapons/Final_End_Zoomed.mp4"
video_with_audio.write_videofile(output_path, codec="libx264")