Blackmagic Forum

I'm looking to get the live video from a DeckLink into Xcode / AVFoundation as a AVCaptureInput. Is this possible?


I can see 'Blackmagic' as a device, but I get a black screen when viewing it. Is this more complicated then I think? Also, am I going to have to be using the API to write a custom plug-in for it to work?


Thanks for the help,
Joe

I have been on these forums for a number of months asking for some manner of an AVFoundation-based solution from BM -- or, at the very least, some sample code for capture and output.

So far, no dice.

A heads up... there is an AVFoundation thread in here stating that 720p is the maximum capture resolution.
viewtopic.php?f=3&t=21483&p=134391&hilit=AVFoundation#p134391

Bruce.

Hi Joe,

If you use UltraStudio Mini Recorder you can use avfoundation and avsession to capture and record movie clip. But if you have to use another ultrastudio or decklink you have to use decklink SDK.

You can record 1080p and 720p na avfoundation and decklink SDK.

Thanks for the help

Is this more complicated then I think?

I see. I got the SDK and am using the demo app "CapturePreview" to view my source (DeckLink Studio 2). What I really need is to get it into Core Animation. I want a CALayer of the Blackmagic source. Is this possible?

As of now, it's drawing a view with:

CreateCocoaScreenPreview(previewView);

I'm guessing I don't want to be using a preview but an actual output. Any ideas?

give the capture example a look. if you get an incoming frame get the pixel data and pass it trough the CALayer.

Hi
I m trying to run the sample code CapturePreview on MacPro. The code runs but the video window does not show anything. When the start button is clicked i get an error message "this application was unable to select the video mode, perhaps the selected device is currently in use".

Note that the video preview works fine on BM media studio. So far I m using the sdk to grab the frames and convert them to openCV Mat and then do some processing. The extracted images work fine but the video preview does not even in openCV! Am i missing a driver?

The sample code works fine on Windows.

Your help is muchooo appreciated