EditNovaFX

Professional Desktop Video Editor — Built with C# · WPF · .NET 8

A full-featured video editing desktop app for Windows , YouTube publishing, multi-track timeline editing, and rich subtitle support. Developed by NLCI Lab.

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⚠️ Note on Windows Security: Since this is an un-signed alpha release, Windows may show a security warning when you run the downloaded executables. You may need to right-click the .exe file, go to Properties, check "Unblock", and click Apply before running.

✨ Key Features

Feature	Details
🎬 Multi-track Timeline	Video, audio & subtitle tracks with drag, resize, trim and playhead scrubbing
🤖 AI Transcription (Local)	Whisper.cpp speech-to-text → auto-generates SRT subtitle files
☁️ AI Transcription (Cloud)	OpenAI Whisper API for word-level accuracy
📝 Subtitle Editor	Import SRT files, font/color/size/bold/italic styling, live preview
🖼️ Logo & Watermark	Add image overlays with position and size controls
📤 Export	FFmpeg-powered 720p / 1080p / 1440p / 4K MP4 export with progress
🚀 YouTube Publisher	OAuth Google sign-in → upload video + custom thumbnail directly
❓ Rich Help System	Structured step-by-step guides, tips, keyboard shortcuts, FAQ per topic

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🗂️ Project Structure

EditNovaFX/
├── Models/               # Data models (Project, Clip, Track, Subtitle …)
├── ViewModels/           # MVVM business logic (CommunityToolkit.Mvvm)
├── Views/                # WPF XAML windows and dialogs
├── Services/             # FFmpeg, Whisper, YouTube, AI content, Undo/Redo
├── Controls/             # Custom WPF controls (TimelineControl)
├── Converters/           # IValueConverter implementations
├── Utilities/            # Timecode helpers
├── Assets/               # App icon / logo
├── App.xaml              # Application-wide resources and styles
└── VideoEditor.csproj    # .NET 8 WPF project file

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🛠️ Tech Stack

Layer	Technology
Framework	.NET 8 · WPF (Windows Presentation Foundation)
MVVM	CommunityToolkit.Mvvm 8.2.2
Video engine	FFmpeg (bundled)
AI (local)	Whisper.cpp — whisper-cli.exe + ggml-*.bin models
AI (cloud)	OpenAI Whisper API
YouTube API	Google.Apis.YouTube.v3 1.73.0 + Google.Apis.Auth
Serialization	Newtonsoft.Json

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🚀 Getting Started (for Developers)

Prerequisites

• Windows 10 / 11 (64-bit)
• .NET 8 SDK → https://dotnet.microsoft.com/download
• FFmpeg — place ffmpeg.exe + ffprobe.exe in a ffmpeg\ subfolder next to the exe
• Whisper.cpp (optional, for AI subtitles) — place whisper.exe in a whisper-bin-x64\ subfolder next to the exe
• Subtitle Parser (optional, for Scripture subtitles) — download from EditNovaFX-SRT-Generator, place in a subtitle-parser\ subfolder

Tip: All tool paths can be configured in File → Settings if you prefer a different location.

Build & Run

# Clone the repo
git clone https://github.com/nlci-lab/EditNovaFX.git
cd EditNovaFX

# Restore packages
dotnet restore

# Build (Debug)
dotnet build

# Run
dotnet run

Publish (self-contained, win-x64)

dotnet publish -c Release -r win-x64 --self-contained true -o publish

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🤖 AI Transcription Setup

The Audio → Subtitle feature needs a Whisper model file (not included — too large for GitHub).

1. Download one .bin file from Hugging Face:

   Model	Size	Best For
   ggml-tiny.bin	75 MB	Quick drafts
   ggml-base.bin	142 MB	General English ✅ Recommended
   ggml-small.bin	466 MB	Non-English languages
   ggml-medium.bin	1.5 GB	Hindi, Tamil, multi-language ✅
   ggml-large-v3.bin	3.1 GB	Maximum accuracy

2. Place the file in: <app folder>\models\

3. Restart the app — it auto-detects the model.

Note: The app shows a download banner with direct links when no model is found.

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📤 YouTube Publishing Setup

YouTube uploading requires your own Google API credentials (none are bundled with the app).

1. Go to Google Cloud Console → create a project
2. Enable YouTube Data API v3 (APIs & Services → Library)
3. Create OAuth 2.0 Client ID (APIs & Services → Credentials → Desktop app)
4. In EditNovaFX: Tools → Setup YouTube API → paste your Client ID and Secret → Save
5. Click Login to YouTube in the AI Publisher — a browser opens for Google OAuth
6. Your credentials are stored in %AppData%\EditNovaFX\youtube_secrets.json

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📦 NuGet Dependencies

<PackageReference Include="Google.Apis.Auth"         Version="1.73.0" />
<PackageReference Include="Google.Apis.YouTube.v3"   Version="1.73.0.4029" />
<PackageReference Include="Newtonsoft.Json"           Version="13.0.4" />
<PackageReference Include="CommunityToolkit.Mvvm"    Version="8.2.2" />

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📋 Keyboard Shortcuts

Key	Action
Space	Play / Pause
F11	Fullscreen preview toggle
Ctrl + S	Save project
Ctrl + Z	Undo
Ctrl + Y	Redo
Delete	Remove selected clip

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📁 Excluded from Repo

The following are not committed (see .gitignore):

• bin/ · obj/ · publish/ — build outputs
• ffmpeg/ · whisper-bin-x64/ — large binary tools
• models/*.bin — AI model files (75 MB – 3 GB)
• InstallPackage/ · *.zip — distribution packages
• **/token.json · **/youtube_secrets.json — OAuth tokens

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📧 Contact & Support

For technical support or inquiries, please contact:

• Jacob Thomas: jacob_thomas@nlife.in
• Benjamin Varghese: benjamin_varghese@nlife.in

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🪪 License

Source code provided for review and educational purposes.
© 2026 NLCI Lab. All rights reserved.