Question

所以我在转换某些音频方面遇到了问题。我在转换时遇到了巨大的内存泄漏，它来自这些代码行。

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;
         }
     }

 }];

似乎导致泄漏的线是： CMSampleBufferRef nextBuffer = [assetReaderOutput copyNextSampleBuffer];

我迷失了这一点，任何帮助都会非常感激。

解答：修复 - 只需在if / else语句的末尾添加这些行。

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

Answer 1

答案：已修复 - 只需在if / else语句的末尾添加这些行。

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

CMSampleBufferRef内存泄漏

1 个答案: