# Sermon Converter

A Rust-based service that automatically monitors a directory for new sermon video files and converts them to an optimized format for streaming.

## Features

- Automatic detection of new MP4 files in the watch directory
- Efficient video conversion using FFmpeg
- Preserves audio quality while optimizing video for streaming
- Automatic file organization with date-based naming
- Syncthing-aware (ignores temporary sync files)

## Prerequisites

- Rust (latest stable version)
- FFmpeg installed and available in PATH
- Sufficient disk space for video processing

## Installation

1. Clone the repository:
```bash
git clone <your-repository-url>
cd sermon-converter
```

2. Build the project:
```bash
cargo build --release
```

## Configuration

The service uses environment variables for configuration:

- `SERMON_WATCH_PATH`: Directory to monitor for new sermon videos
- `SERMON_OUTPUT_PATH`: Directory where converted videos will be saved

Example:
```bash
export SERMON_WATCH_PATH="/path/to/watch/directory"
export SERMON_OUTPUT_PATH="/path/to/output/directory"
```

## Usage

Run the service:
```bash
cargo run --release
```

Or run the built binary:
```bash
./target/release/sermon_converter
```

The service will:
1. Process any existing MP4 files in the watch directory
2. Continue monitoring for new files
3. Automatically convert new MP4 files as they appear

## Running as a System Service

To run as a systemd service, create a service file at `/etc/systemd/system/sermon-converter.service`:

```ini
[Unit]
Description=Sermon Video Converter Service
After=network.target

[Service]
Type=simple
User=<your-username>
Environment="SERMON_WATCH_PATH=/path/to/watch/directory"
Environment="SERMON_OUTPUT_PATH=/path/to/output/directory"
ExecStart=/path/to/sermon_converter
Restart=always
RestartSec=10

[Install]
WantedBy=multi-user.target
```

Enable and start the service:
```bash
sudo systemctl enable sermon-converter
sudo systemctl start sermon-converter
```

## Video Conversion Details

The service converts videos using the following FFmpeg settings:
- Video codec: H.264 (libx264)
- Audio codec: AAC
- Video preset: medium
- Constant Rate Factor (CRF): 23
- Pixel format: yuv420p
- Audio bitrate: 128k
- Audio sample rate: 44100 Hz

## File Naming Convention

Converted files are named based on the original filename's date pattern:
- Input: `YYYY-MM-DD_sermon.mp4`
- Output: `YYYY-MM-DD_sermon_converted.mp4`

## Troubleshooting

- **FFmpeg not found**: Ensure FFmpeg is installed and in your system PATH
- **Permission denied**: Check that the service has read/write permissions for both watch and output directories
- **Files not detected**: Verify the watch directory path and that files are complete before processing

## License

See LICENSE file for details.

## Contributing

Contributions are welcome! Please submit pull requests or issues through the repository.