CODEWITHSUNDEEP
objective-c
Vrijendra Kumar Singh
Vrijendra Kumar Singh

Reputation: 33

how to get current frame from camera (Video capture device)

Hi I am trying to get current frame from video capture device and I used following piece of code in my application code.

-(CVImageBufferRef) get_current_frame
{

    CVImageBufferRef buffer;
    @synchronized (self) {
        buffer  = m_curr_buffer;
        CVBufferRetain(buffer);
    }

    return buffer;  
}

But after building I am getting following type of linking error.

Undefined symbols:
  "_CVBufferRetain", referenced from:
      -[my_class get_current_frame] in my_class.o
ld: symbol(s) not found
collect2: ld returned 1 exit status

Upvotes: 2

Views: 816

Answers (1)

jakeva
jakeva

Reputation: 2835

I see it's been a while since you asked this, but I wanted to post the solution for posterity. You simply need to make sure that you have the CoreVideo framework linked. That's it!

Upvotes: 1

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