ZoomSDKError_WrongUsage on subscribing to raw video data

Meeting SDK macOS
1

I am trying to use the zoomSDK sample app to capture raw video data for all users in a meeting.
After reading the documentation and a few posts on the forum, I figured that I need to create an instance of ZoomSDKRenderer for every user. So I wrote a helper class which creates a new ZoomSDKRenderer instance. But when I call the method to subscribe to a userID, the SDK throws ZoomSDKError_WrongUsage error.

init method of the helper class:

- (id)initWithUID:(unsigned int)uid {
    if (self = [super init]) {
        self.uid = uid;
        ZoomSDKRenderer* sdkrenderer = nil;
        ZoomSDKError e = [[[ZoomSDK sharedSDK] getRawDataController] creatRender:&sdkrenderer];
        if (e == ZoomSDKError_Success) {
            ZoomSDKError rawDataSubscriptionError = [sdkrenderer subscribe:uid rawDataType:ZoomSDKRawDataType_Video];
            NSLog(@"Subscription Error: %d", rawDataSubscriptionError);
            if (rawDataSubscriptionError == ZoomSDKError_Success) {
                self.renderer = sdkrenderer;
                self.renderer.delegate = self;
                return self;
            }
        }
    }
    return nil;
}

In the log I’m getting ZoomSDKError_WrongUsage with no particular reasons mentioned.

I am creating instances of this class inside
- (void)onVideoStatusChange:(ZoomSDKVideoStatus)videoStatus UserID:(unsigned int)userID 

- (void)onVideoStatusChange:(ZoomSDKVideoStatus)videoStatus UserID:(unsigned int)userID {
    if (videoStatus == ZoomSDKVideoStatus_On) {
        ZoomRendererHelper* renderHelper = [[ZoomRendererHelper alloc] initWithUID:userID];
    }
}
  • Device: Apple MacBook Pro (13-inch, M2)
  • OS: macOS Ventura 13.1
1 Like
2

@shubhangsati, Hi hope you will be fine.

To resolve :point_up_2: please bind SDK renderer inside onMeetingStatus event when status=="joined".

If still any problem you are facing share that.

3

Here is the rendering logic for multi-renderers.

4

Hi Naeem,
Thanks for the quick response.
I am creating the renderer and subscribing when the user turns on their video. That should imply the user has already “joined” the meeting, right?

5

Then it is OK. Do you have properly configured local_recording and zak tokens when joining the meeting?

6

Yes. I am able to start the raw recording and the recording gets saved locally as well once the meeting ends.

Interestingly enough, if I create the renderer inside
- (void)onMeetingStatusChange:(ZoomSDKMeetingStatus)state, as follows

if (state == ZoomSDKMeetingStatus_InMeeting) {
    ...
    ...
    NSArray *userList = [actionController getParticipantsList];
    NSNumber* userID = userList.firstObject;
    
    ZoomSDKRenderer *sdkrenderer = nil;
    ZoomSDKError e = [[[ZoomSDK sharedSDK] getRawDataController] creatRender:&sdkrenderer];
    if (e == ZoomSDKError_Success) {
        sdkrenderer.delegate = self;
        ZoomSDKError rawDataSubscriptionError = [sdkrenderer subscribe:[userID unsignedIntValue] rawDataType:ZoomSDKRawDataType_Video];
        NSLog(@"subscription error: %@", [NSString stringWithFormat:@"%u", rawDataSubscriptionError]);
    }
    ...
    ...
}

This works. And I’m able to get raw frames for the host.

But I don’t get the callback in this method every time a user joins or starts their video which is why I had used onVideoStatusChange to create the renderers.

I have also verified that the control reaches onVideoStatusChange after the recording has started.

7

@shubhangsati Please read my shared topic where I shared the solution on how to create the renderers for other users.

8

@shubhangsati, if you’re still having trouble another option is to use a third party hosted bot API like Recall.ai.

9

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