Video Music Merger

Overview

This skill helps users add appropriate background music to short videos. It analyzes the video's visual content, recommends music styles, finds royalty-free sources, and merges the selected audio with the video using ffmpeg — trimming, fading, and optionally replacing the original audio.

When to Use

• User sends a video file and asks for music recommendations or "add BGM"
• User wants to replace or mix audio in a video
• The video is short-form social media content (3-60 seconds)
• User needs help finding royalty-free music for commercial use

Workflow

Step 1: Analyze Video Content

1. Extract key frames from the video using ffmpeg:

   ffmpeg -i "<video_path>" -vf "fps=1,scale=360:-1" -q:v 2 /tmp/video_frames/frame_%03d.jpg
   

2. View the extracted frames to understand the scene, mood, colors, and pace.
3. Note the video duration and resolution using ffprobe:

   ffprobe -i "<video_path>" 2>&1 | grep -E "Duration|Stream|Video|Audio"
   

Step 2: Recommend Music Styles

Based on the visual analysis, recommend 2-4 music styles with specific examples. Common directions for short videos: