VideoToolBox解碼圖像顯示在約塞米蒂flickring OSX

我已經使用videoToolBox用於編碼和解碼數據，所以一旦我們得到了解碼數據直接我們傳遞到AVSampleBufferDisplayLayerVideoToolBox解碼圖像顯示在約塞米蒂flickring OSX

這裏是代碼片段

-(CVPixelBufferRef)decode:(AVPacket*)vp { 

    CVPixelBufferRef outputPixelBuffer = NULL; 

    CMBlockBufferRef blockBuffer = NULL; 
    OSStatus status = CMBlockBufferCreateWithMemoryBlock(kCFAllocatorDefault, 
                  (void*)vp->data, vp->size, 
                  kCFAllocatorNull, 
                  NULL, 0, vp->size, 
                  0, &blockBuffer); 


    //NSLog(@"status is for CMBlockBufferCreateWithMemoryBlock is %d",(int)status); 
    if(status == kCMBlockBufferNoErr) { 
     CMSampleBufferRef sampleBuffer = NULL; 
     const size_t sampleSizeArray[] = {vp->size}; 
     status = CMSampleBufferCreateReady(kCFAllocatorDefault, 
              blockBuffer, 
              formatDesc , 
              1, 0, NULL, 1, sampleSizeArray, 
              &sampleBuffer); 
     // NSLog(@"status is for formatdesc is %d",(int)status); 
     if (status == kCMBlockBufferNoErr && sampleBuffer) { 
      CFArrayRef attachments = CMSampleBufferGetSampleAttachmentsArray(sampleBuffer, YES); 
      CFMutableDictionaryRef dict = (CFMutableDictionaryRef)CFArrayGetValueAtIndex(attachments, 0); 
      CFDictionarySetValue(dict, kCMSampleAttachmentKey_DisplayImmediately, kCFBooleanTrue); 
      [displayLayer flush]; 
      if([displayLayer isReadyForMoreMediaData]) 
      { 
       [displayLayer enqueueSampleBuffer:sampleBuffer]; 
      } 

      [displayLayer setNeedsDisplay]; 

      [self performSelectorOnMainThread:@selector(setView:) withObject:[[RPCViewerAppInitializer sharedRPCViewerAppInitializer] rpcView] waitUntilDone:NO]; 
      CFRelease(blockBuffer); 
      CFRelease(sampleBuffer); 

     } 
    } 
    return outputPixelBuffer; 
}

上面的代碼在10.10 osx中工作正常，但在10.10我在屏幕上閃爍。

任何幫助將是可觀的。

來源

2017-10-13 PR Singh

能夠將此屬性設置爲得到回答自己:) –

謎底到底是什麼？！將它添加到此處並將其標記爲已回答！ –

我將AVSampleBufferDisplayLayer的controlTimebase屬性設置爲零，這是原因，現在我根本沒有設置此屬性 –

這個問題已經解決了：

我設置AVSampleBufferDisplayLayer的controlTimebase財產爲零，這是原因，現在一點都不

來源

2017-10-16 09:49:17

VideoToolBox解碼圖像顯示在約塞米蒂flickring OSX

回答

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