PrusaCam Image Capture and Upload

Overview

This project captures images from a video stream, processes them, and uploads them to a specified server. It is designed to work with PrusaCam, utilizing the Nager.VideoStream library for video stream handling, and SixLabors.ImageSharp for image processing. The application is configured via a JSON file and supports both Windows and Linux operating systems.

Features

• Captures images from a video stream URL.
• Processes images to fit a maximum size constraint.
• Periodically uploads processed images to a server.
• Configuration via appsettings.json file.
• Supports Windows and Linux.

Requirements

• .NET 6.0 or later
• FFMPEG
• PrusaCam API token

Configuration

The application requires a configuration file named appsettings.json in the root directory. If this file does not exist, the application will attempt to create one based on default-appsettings.json. The configuration file should contain the following settings:

{
  "Token": "your-api-token",
  "BaseUrl": "http://your-server-url",
  "StreamURL": "http://your-stream-url",
  "Delay": 60,
  "FfmpegPathWindows": "path-to-ffmpeg-windows",
  "FfmpegPathLinux": "path-to-ffmpeg-linux"
}

Usage

1. Load Configuration: Ensure appsettings.json exists in the root directory. If not, the application will guide you through creating one using default settings.

2. Run the Application: Execute the application. It will start capturing images from the specified stream URL and uploading them to the server at intervals defined by the Delay setting.

3. Monitor Output: The application will log messages to the console, indicating the status of image capture, processing, and upload operations.

Key Components

Main Program

• Initializes configuration and HTTP client.
• Sets up a timer for periodic uploads.
• Starts listening for events (keeps the application running).

Configuration Handling

• Loads configuration from appsettings.json.
• If the configuration file is missing, prompts the user to create one based on defaults.

Image Capture and Upload

• Uses Nager.VideoStream to capture images from the stream URL.
• Processes the captured image using SixLabors.ImageSharp to ensure it fits within a 10 MB size limit.
• Uploads the processed image to the server via PrusaCam API.

Semaphore for Concurrent Access

• Ensures that only one upload operation occurs at a time using SemaphoreSlim.

Error Handling

The application logs any errors encountered during configuration loading, image processing, or upload operations to the console.

Example Console Output

Configuration loaded successfully.
First Upload will run at 2024-05-28T12:00:00Z
Processing new image at 2024-05-28T12:00:00Z
Uploading 1048576 bytes
Image processed and uploaded at 2024-05-28T12:00:05Z. Next allowed upload at 2024-05-28T12:01:05Z

Building and Running

To build and run the application, use the following commands:

dotnet build
dotnet run

Ensure FFMPEG is installed and accessible from the paths specified in the configuration.

Contributing

Contributions are welcome! Please fork the repository and submit a pull request.

License

This project is licensed under the MIT License.

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For more detailed information on the API usage and configuration, refer to the official PrusaCam API documentation.