VideoCallWidget.dart

await loginRoom();
startListenEvent();
if (widget.isVideo && widget.isHost) {
  // start recording the screen
  screenRecordUtils = ZegoScreenRecordUtils();
  await screenRecordUtils!.startScreenShare(
    widget.roomId,
    widget.user.id,
  );
  // ZegoExpressEngine.instance.enableCamera(widget.isVideo);
}

VideoRecordingUtils.dart

Future<void> startScreenShare(String roomId, String userId) async {
  // start screen share
  source ??= (await ZegoExpressEngine.instance.createScreenCaptureSource())!;
  await ZegoExpressEngine.instance.setVideoConfig(
    ZegoVideoConfig.preset(
      ZegoVideoConfigPreset.Preset1080P,
    ),
    channel: ZegoPublishChannel.Aux,
  );
  await ZegoExpressEngine.instance.setVideoSource(ZegoVideoSourceType.ScreenCapture, channel: ZegoPublishChannel.Aux);
  await ZegoExpressEngine.instance.setAudioSource(ZegoAudioSourceType.Microphone, channel: ZegoPublishChannel.Aux);
  await source!.startCapture();
  String streamID = '${roomId}_${userId}_screen_sharing'; // You can define your stream ID based on your actual business needs.
  await ZegoExpressEngine.instance.startPublishingStream(streamID, channel: ZegoPublishChannel.Aux);

  // start recording
  Directory? tempDir = await getApplicationDocumentsDirectory();
  String? tempPath = tempDir.path;

  try {
    // Set recording file path, for example, .mp4 format.
    var filePath = '$tempPath/screen_record.mp4';
    // Set recording type
    var recordType = ZegoDataRecordType.AudioAndVideo;
    var recordConfig = ZegoDataRecordConfig(filePath, recordType);

    // Start recording with the main channel.
    ZegoExpressEngine.instance.startRecordingCapturedData(recordConfig, channel: ZegoPublishChannel.Aux);
  } catch (e, s) {
    kDebugMode
        ? debugPrint("Error: An error occurred while starting the recording! $e $s")
        : null;
  }
}


Future<String?> stopScreenShare(String roomId, String userId) async {
  await source?.stopCapture();
  await ZegoExpressEngine.instance.stopPreview(channel: ZegoPublishChannel.Aux);
  await ZegoExpressEngine.instance.stopPublishingStream(channel: ZegoPublishChannel.Aux);
  await ZegoExpressEngine.instance.setVideoSource(ZegoVideoSourceType.None, channel: ZegoPublishChannel.Aux);
  ZegoExpressEngine.instance.stopRecordingCapturedData(channel: ZegoPublishChannel.Aux);
  await ZegoExpressEngine.instance.setAudioSource(ZegoAudioSourceType.None, channel: ZegoPublishChannel.Aux);
  if (source != null) {
    await ZegoExpressEngine.instance.destroyScreenCaptureSource(source!);
    source = null;
  }
  Directory? tempDir = await getApplicationDocumentsDirectory();
  String? tempPath = tempDir.path;
  var filePath = '$tempPath/screen_record.mp4';
  return filePath;
}