startLocalPreview method Null safety
Enable the preview image of local video
When the first camera video frame starts to be rendered, you will receive the onFirstVideoFrame(null)
callback in TRTCCloudListener
.
Parameters:
frontCamera true: front camera; false: rear camera.
viewId viewId
generated by TRTCCloudVideoView
Implementation
Future<void> startLocalPreview(bool frontCamera, int? viewId) {
if (viewId == null) {
return _channel
.invokeMethod('startLocalPreview', {"isFront": frontCamera});
} else {
return TRTCCloudVideoViewController(viewId)
.startLocalPreview(frontCamera);
}
}