CMSampleBufferRef内存泄漏

所以我在转换某些音频时遇到问题。转换时，我遇到了巨大的内存泄漏，它来自这些代码行。CMSampleBufferRef内存泄漏

dispatch_queue_t mediaInputQueue = dispatch_queue_create("mediaInputQueue", NULL); 
[assetWriterInput requestMediaDataWhenReadyOnQueue:mediaInputQueue 
             usingBlock:^
{ 

    while (assetWriterInput.readyForMoreMediaData) 
    { 
     CMSampleBufferRef nextBuffer = [assetReaderOutput copyNextSampleBuffer]; 
     if (nextBuffer) 
     { 

      [assetWriterInput appendSampleBuffer: nextBuffer]; 
       nextBuffer = NULL;    

     } 
     else 
     { 
      // done! 
      [assetWriterInput markAsFinished]; 
      [assetWriter finishWriting]; 
      [assetReader cancelReading]; 
      NSDictionary *outputFileAttributes = [[NSFileManager defaultManager] 
                attributesOfItemAtPath:exportPath 
                error:nil]; 





      NSNumber *doneFileSize = [NSNumber numberWithLong:[outputFileAttributes fileSize]]; 
      [self performSelectorOnMainThread:@selector(updateCompletedSizeLabel:) 
            withObject:doneFileSize 
           waitUntilDone:NO]; 

      // release a lot of stuff 
      [assetReader release]; 
      [assetReaderOutput release]; 
      [assetWriter release]; 
      [assetWriterInput release]; 
      [exportPath release]; 
      break; 
     } 
    } 

}];

似乎引起泄漏的行是： CMSampleBufferRef nextBuffer = [assetReaderOutput copyNextSampleBuffer];

我迷失在这一个任何帮助将不胜感激。

答案：固定 - 只需在if/else语句的末尾添加这些行即可。

CMSampleBufferInvalidate(nextBuffer); 
     CFRelease(nextBuffer); 
     nextBuffer = nil; // NULL?

来源

2012-02-20 Krzemienski

回答：固定 - 只需在if/else语句的末尾添加这些行即可。

CMSampleBufferInvalidate(nextBuffer); 
CFRelease(nextBuffer); 
nextBuffer = NULL;

来源

2012-02-22 02:30:38 Krzemienski

为什么在CFRelease之前调用'CMSampleBufferInvalidate'？ – Meekohi 2013-10-30 21:32:50

@Meekohi可能不需要这个确切的顺序，这是前段时间做的，但我不确定，但我知道组合完成了这项工作。 – Krzemienski 2013-12-18 01:05:52

即使使用没有CMSampleBufferInvalidate和sampleBuffer = NULL的示例缓冲区，调用CFRelease也会导致崩溃。我建议只使用CMSampleBufferInvalidate（nextBuffer）; nextBuffer = NULL; – Zigglzworth 2014-07-06 12:11:19

CMSampleBufferRef内存泄漏

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