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Batch concatenate MP4 videos with fade in/out transitions #

1. Install MoviePy (pip3 install moviepy) and ffmpeg

2. Edit Python script below, adjusting fade_duration and input_folder as desired, then save (e.g., combine_videos.py):

   import os
   from moviepy.editor import VideoFileClip, concatenate_videoclips
   
   def add_fade_effects(clips, duration=2):
       faded_clips = []
       for i, clip in enumerate(clips):
           if i != 0:
               clip = clip.set_start(clips[i-1].end)
               clip = clip.crossfadein(duration)
           clip = clip.fadein(duration).fadeout(duration)  # Apply fade-in and fade-out to each clip
           faded_clips.append(clip)
       return faded_clips
   
   def combine_videos_with_fades(input_folder, output_file, fade_duration=0.5):
       video_files = [os.path.join(input_folder, f) for f in sorted(os.listdir(input_folder)) if f.endswith('.mp4')]
       video_clips = [VideoFileClip(video) for video in video_files]
       video_clips = add_fade_effects(video_clips, fade_duration)
       final_clip = concatenate_videoclips(video_clips, method="compose")
       final_clip.write_videofile(output_file, codec="libx264")
   
   if __name__ == "__main__":
       input_folder = "/path/to/mp4s"  # Replace with the path to your folder containing MP4 files
       output_file = "combined_video_with_fades.mp4"
       combine_videos_with_fades(input_folder, output_file)

3. Run python3 combine_videos.py

/nix | Jun 15, 2024

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