🎬 Timeline Editor (Mimir Engine)

Video editing with multi-track audio and live caption burning

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🎥
GStreamer Playback

Hardware-accelerated video

📊
Multi-Track Waveforms

Visual audio representation

✂️
Frame-Accurate Trimming

Precise cut points

🔊
LUFS Normalization

YouTube-standard audio

✨ Live Caption System (NEW!)

Burn karaoke-style captions directly into your videos:

Caption Styles

  • One Word Pop - Single word at a time (karaoke effect)
  • Full Segment - Complete sentence with highlighted word
  • Sliding Window - N words around current position

Caption Colors

Customize in Settings → Captions:

  • Highlight - Current word (default: orange)
  • Pending - Upcoming words (default: gray)
  • Spoken - Past words (default: dark gray)

Caption Options

  • Position - Bottom, Top, Center, corners
  • Font Size - 12-72 pixels
  • Max Width - Percentage of video width
  • Linger Time - How long to show after speech ends
  • Background - Semi-transparent backdrop for readability

Using Captions

  1. Transcribe video first (with Word Timestamps enabled)
  2. Load video in Timeline Editor
  3. Enable "Show Captions" checkbox
  4. Preview captions during playback
  5. Click "Burn Captions" to embed in video

Audio Track Management

  • Auto-Detect - Finds all audio tracks (Game, Mic 1, Mic 2, etc.)
  • Per-Track Controls - Volume sliders, mute, enable/disable
  • Voice Dominant Mix - Auto-balance for gaming commentary
  • LUFS Analysis - Measure and normalize loudness

Workflow

  1. Click "Load Video" to select your recording
  2. Use Spacebar to play/pause
  3. Press 'I' to mark In point (start of cut)
  4. Press 'O' to mark Out point (end of cut)
  5. Adjust audio track levels
  6. Enable captions if desired
  7. Click "Export" when done

Keyboard Shortcuts

Key Action
Spacebar Play/Pause
I Mark In Point
O Mark Out Point
←/→ Step 1 second
Ctrl+←/→ Jump 10 seconds

💡 Pro Tips

  • Enable Word Timestamps in transcription for caption support
  • Use waveforms to find silent sections for cuts
  • Preview captions before burning - adjustments are free!
  • Mark multiple small cuts for flexibility
  • Use Voice Dominant auto-balance for gaming content
← Workflow Guide Transcription →
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