flutter_lite_camera 0.1.0

A lightweight Flutter camera plugin for Windows, Linux, and macOS. Renders previews natively through Flutter textures and captures RGB frames on demand for image processing.

Flutter Lite Camera

Flutter Lite Camera is a lightweight Flutter plugin designed for capturing camera frames in RGB888 format. The plugin supports Windows, Linux, and macOS platforms, making it ideal for building camera preview applications and performing image processing tasks. The default target resolution is 640x480; each platform negotiates with the device and every frame reports its actual width and height.

Features

• Cross-Platform: Compatible with Windows, Linux, and macOS.
• Native Texture Preview: Renders the video feed directly at the native layer through a Flutter texture — no per-frame data copies into Dart.
• RGB888 Frame Format: Captures uncompressed RGB888 frames on demand for easy image processing, without disturbing the preview stream.
• Simple Integration: Easy-to-use API for seamless Flutter integration.

Requirements

• Flutter SDK: Version 3.0.0 or above

• Permissions: Ensure camera access is granted on macOS. In DebugProfile.entitlements or Release.entitlements, add:

  <key>com.apple.security.device.camera</key>
  <true/>
  

API

Method	Description
getDeviceList()	Returns a list of available camera devices.
open(int index)	Opens the camera at the specified index.
startPreview()	Starts the native preview stream and returns a texture id for a Texture widget.
stopPreview()	Stops the preview stream and unregisters the texture.
captureFrame()	Captures a single frame as an RGB888 image. While a preview is running, the frame comes from a native cache and the stream is unaffected.
release()	Releases the camera resources.

Usage

final camera = FlutterLiteCamera();

final devices = await camera.getDeviceList();
if (devices.isNotEmpty) {
  await camera.open(0);

  // Preview: display the returned texture id with a Texture widget.
  final int textureId = await camera.startPreview();
  // ... Texture(textureId: textureId)

  // Decode: grab a single frame whenever you need one (e.g. for barcode
  // scanning). This does not interrupt the preview.
  final frame = await camera.captureFrame();
  final Uint8List rgb = frame['data'];   // RGB888, width * height * 3 bytes
  final int width = frame['width'];
  final int height = frame['height'];

  await camera.stopPreview();
  await camera.release();
}