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Lesson 90

Multi-track Editing for Video Production

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Introduction

Welcome back! In our last session, you mastered the art of processing raw voiceover audio, transforming it into a clean, crisp, and professional-sounding track using Audacity or your video editor's built-in tools. You now have the two core components of your faceless product video: a high-quality screen recording from OBS and a polished voiceover.

Today, we'll begin the exciting process of weaving these elements together. This lesson is where the story truly takes shape. We'll be focusing on the fundamental skill of video editing: assembling a multi-track video. Our learning outcome is to assemble a multi-track video with b-roll, screen recordings, and background music in your chosen editor.

You'll learn how to lay out your main narration, cover cuts with relevant B-roll footage, and add a layer of polish with background music and sound effects. This process forms the backbone of virtually all video content, especially the product walkthroughs and tutorials you'll be creating for your faceless brand.

Given your goal to move away from subscription software after graduation, we'll focus on techniques that are directly applicable in DaVinci Resolve, which runs exceptionally well on your M1 Pro MacBook Pro. However, the principles are universal and will apply in Premiere Pro, which you're already familiar with.

Part 1: The Foundation – Organization and Workflow

A systematic approach is the key to efficient editing. Before you even import a single file, setting up a logical structure will save you immense time and prevent headaches.

Video Postproduction Guide: Editing, Output, and Workflow

Let's start with a professional workflow. This guide from Georgia Tech's communications department outlines a standard 11-step post-production process. We'll focus on the initial organization steps.

Read Step 1: 'Organize the Project' and Step 3: 'Organize Media Assets'. Focus on the recommended folder structure (Footage, Audio, Graphics, etc.) and the concept of using 'bins' inside your editor. This is the organizational framework we'll use.

Your Folder Structure:
Before you open your video editor, create a main project folder. Inside it, create these subfolders:

  • 01_Video (for your OBS screen recordings and any other camera footage)
  • 02_Audio (for your cleaned-up voiceover and music)
  • 03_Graphics (for logos, images, or overlays)
  • 04_Project_Files (to save your DaVinci Resolve or Premiere Pro project file)
  • 05_Exports (for your final rendered videos)

This disciplined approach ensures you can always find your assets, and it makes your projects portable and easy to back up.

Part 2: Assembling the Multi-Track Timeline

Now, let's open your editor and start building the video. The core of any video editor is the timeline, where you layer different media elements, or "tracks."

To understand these layers, let's define some key terms with this excellent video from the Resolve Cut channel.

Master DaVinci Resolve 20 | From Basics to Pro Workflow (Free)

This video will serve as our main guide for working in DaVinci Resolve. We'll start by understanding the building blocks of an edit and the editor's interface.

Watch from the beginning to 05:50. The first part (until 03:23) defines essential terms like A-roll, B-roll, music, and SFX, and gives an overview of the Resolve interface. The second part (from 03:23 to 05:50) walks you through creating a project, importing your organized assets, and making your first basic cuts.

The Layers of Your Video

  • A-Roll: This is your primary narrative. For our project, it consists of your screen recording (video) and your cleaned-up voiceover (audio). It drives the story.
  • B-Roll: This is supplemental footage that adds visual context and is layered on top of your A-roll. It's used to:
    • Show what the narrator is talking about (e.g., a close-up of a feature).
    • Hide cuts or mistakes in the A-roll (a "jump cut").
    • Keep the video visually interesting.
  • Audio Tracks: Below your video tracks, you'll have multiple audio tracks for your voiceover, background music, and sound effects (SFX).
DaVinci Resolve Multi-Track Editing Interface
A multi-track timeline in DaVinci Resolve. The screen recording and voiceover form the main narrative on tracks V1/A1, while B-roll clips can be layered on V2 to add visual context. Music and sound effects occupy the audio tracks below.

Part 3: Building the Edit, Step-by-Step

Let's start the hands-on process. You will need:

  1. Your OBS screen recording.
  2. Your edited voiceover WAV file from the last lesson.
  3. A few B-roll clips. You can create these by recording short, silent clips of you using the software you're demonstrating, or by recording your Figma designs. Aim for 3-5 clips, each 5-10 seconds long.

Step 1: The Assembly Cut

  1. Create Your Project: Open DaVinci Resolve (or Premiere Pro) and save your project in the 04_Project_Files folder.
  2. Import Your Media: In the Media Pool, import the folders you created (01_Video, 02_Audio, etc.).
  3. Sync Your A-Roll: Drag your screen recording to the V1 (Video 1) track and your voiceover to the A1 (Audio 1) track. Align them perfectly. If you clapped at the start of your recording, you can align the spike in the waveforms. Otherwise, listen to the scratch audio from the recording and match it to your clean voiceover, then delete the scratch audio track.
  4. Make the Rough Cut: Play through your A-roll. Using the cutting tools, remove any long pauses, mistakes, or sections you don't need. Don't worry about making it look smooth yet; the goal is just to get the core narration in place.

For a much faster workflow, embrace keyboard shortcuts.

Master DaVinci Resolve 20 | From Basics to Pro Workflow (Free)

Editing with a mouse is slow. Since you value efficiency, mastering shortcuts is non-negotiable. This section of the Resolve Cut video introduces a professional, keyboard-centric workflow.

Watch from 05:50 to 07:44. Pay close attention to the concepts of 'selection follows playhead' and the trim keys (Q, W, E). While the video uses a custom preset, the default Resolve shortcuts for these functions are powerful. For example, 'Split Clip' is Cmd+B and 'Ripple Delete' is Shift+Delete.

Step 2: Layering B-Roll

Now, we'll cover the "jump cuts" (the jarring visual jumps where you cut your A-roll) with B-roll.

Master DaVinci Resolve 20 | From Basics to Pro Workflow (Free)

Let's see how to add B-roll and other visual elements to make the edit more dynamic.

Watch from 07:44 to 08:56. This demonstrates how to drop B-roll onto a higher track (V2) to cover a cut in the A-roll on V1. It also introduces using keyframes for simple zoom effects, a great way to add emphasis.

Place your B-roll clips on the V2 track, directly above the jump cuts in your A-roll. When the playhead reaches the B-roll clip, it will be displayed instead of the A-roll footage underneath, creating a seamless visual experience for the viewer.

Pro-Tip: J-Cuts and L-Cuts
For a smoother, more professional flow, use J-Cuts and L-Cuts. These are editing techniques where the audio and video transition at different times.

  • L-Cut: The audio from the first clip continues as the video cuts to the second clip.
  • J-Cut: The audio from the second clip begins before the video cuts to it.

You can learn more about these in the "Apply Editing Techniques" section of the Video Postproduction Guide you reviewed earlier (resource_id: [LINK](https://comm.gatech.edu/campus-resources/video-postproduction), relevant section idx:5). To perform one, you typically need to unlink the audio and video of a clip, then drag the edge of either the audio or video to create an overlap.

Step 3: Adding Music and Sound

The final layer is audio polish. Sound is critical for setting the mood and emphasizing actions.

Master DaVinci Resolve 20 | From Basics to Pro Workflow (Free)

The final step is to integrate sound effects and music to bring your edit to life. This section shows how to layer sounds and mix them effectively.

Watch from 16:24 to 17:45. Focus on how sound effects are placed under visual actions to give them impact, and how audio levels are adjusted so they don't overpower the main narration. This is the key to a good audio mix.

  1. Find Music: Go to the YouTube Audio Library and find a royalty-free background track that fits the mood of your video. Download it and place it in your 02_Audio folder.
  2. Add to Timeline: Drag the music track to the A2 audio track, underneath your voiceover.
  3. Mix the Levels: This is the most important step. Your voiceover must be perfectly clear. A standard rule is to set the background music volume level to be between -12dB and -20dB lower than your voiceover. Play the video and listen. If you can't understand every word of the voiceover easily, lower the music volume further. You can do this by lowering the volume of the entire track or by using keyframes to "duck" the music (lower its volume) whenever there is narration.

Your Turn: Assemble Your Video

It's time to put it all together.

  1. Setup: Create your project folder structure on your computer.
  2. Assets:
    • Your clean voiceover from the last lesson.
    • Your OBS screen recording.
    • 3-5 new B-roll clips you record.
    • One background music track from the YouTube Audio Library.
  3. Assembly Checklist:
    • Create a new project in DaVinci Resolve or Premiere Pro.
    • Import all your assets into organized bins.
    • Sync your A-roll (screen recording + voiceover) and make a rough cut of the narrative.
    • Cover at least three jump cuts in your A-roll with your B-roll clips on a higher video track.
    • Challenge: Attempt one L-cut or J-cut for a smooth transition.
    • Add your background music to a lower audio track.
    • Adjust the music volume so your voiceover is always dominant and crystal clear.

Don't worry about perfection. The goal is to practice the workflow of layering video and audio tracks to build a cohesive sequence.

Conclusion

Congratulations! You've just completed the fundamental workflow of a video editor. You've taken disparate media files and assembled them into a structured, multi-layered story. This skill is the foundation upon which all other video editing techniques are built.

Key Takeaways:

  • Organization is paramount: A clean folder structure and organized media bins make editing faster and more manageable.
  • Editing is layering: Videos are built on a multi-track timeline with A-roll as the foundation, B-roll for context, and audio tracks for music and effects.
  • The A-Roll drives the story: Get your primary narrative and pacing right first.
  • B-Roll hides imperfections and adds interest: Use it strategically to cover cuts and show, not just tell.
  • Audio mixing is non-negotiable: Dialogue and voiceover must always be the clearest element in your audio mix.

Preview of the Next Lesson

Your video now has a solid structure. In the next lesson, we will build on this by adding another layer of polish and information. We will focus on how to enhance a video with animated text overlays and simple motion graphics to highlight key features. This will allow you to direct the viewer's attention and make your product walkthroughs even more effective and professional.