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BradLarson / GPUImage

An open source iOS framework for GPU-based image and video processing
http://www.sunsetlakesoftware.com/2012/02/12/introducing-gpuimage-framework
BSD 3-Clause "New" or "Revised" License
20.2k stars 4.61k forks source link

newCGImageFromCurrentlyProcessedOutput return null #2575

Open ChenZeBin opened 6 years ago

ChenZeBin commented 6 years ago

I code run here

  if (dispatch_semaphore_wait(imageCaptureSemaphore, convertedTimeout) != 0)
    {
        return NULL;
    }

what causes it