onStart property

FutureOr<void> Function(String streamId)? onStart

@detail callback @author wangzhanqiang @brief Prompt custom encoded frames to start pushing callbacks.
After receiving this callback, you can call pushExternalEncodedVideoFrame{@link #RTCEngine#pushExternalEncodedVideoFrame} to push a custom encoded video frame to the SDK @param streamId The ID of the encoded stream that can be pushed @param streamInfo The properties of the encoded stream that can be pushed

Implementation

FutureOr<void> Function(String streamId)? onStart;