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当我要使用图像数组创建视频时，当有一个长度超过 100 个对象的数组时，我会崩溃，然后它会发出内存警告并崩溃。任何人都请帮助我如何处理它。我正在做 ARC 项目。请参阅下面我用于 MP4 视频的代码。

 NSError *error;
NSString *path = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/video.mov"];
AVAssetWriter *videoWriter = [[AVAssetWriter alloc] initWithURL:[NSURL fileURLWithPath:path] fileType:AVFileTypeQuickTimeMovie error:&error];

NSDictionary *videoSettings = [NSDictionary dictionaryWithObjectsAndKeys:
                               AVVideoCodecH264, AVVideoCodecKey,

                               [NSNumber numberWithInt:1024], AVVideoWidthKey,

                               [NSNumber numberWithInt:768], AVVideoHeightKey,

                               nil];

AVAssetWriterInput* videoStream = [AVAssetWriterInput assetWriterInputWithMediaType:AVMediaTypeVideo outputSettings:videoSettings];


AVAssetWriterInputPixelBufferAdaptor *adaptor = [AVAssetWriterInputPixelBufferAdaptor assetWriterInputPixelBufferAdaptorWithAssetWriterInput: videoStream sourcePixelBufferAttributes:nil];
[videoWriter addInput:videoStream];
[videoWriter startWriting];

[videoWriter startSessionAtSourceTime:CMTimeMake(0,3.2)];


CVPixelBufferRef buffer = NULL;
int frameCount = 2;

for(int i=0;i<[imagesArray count];i++)
{
    @try{

    buffer = [self pixelBufferFromCGImage:[[imagesArray objectAtIndex:i] CGImage] andSize:CGSizeMake(1024,768)];
    BOOL append_ok = NO;
    if (adaptor.assetWriterInput.readyForMoreMediaData){
        CMTime frameTime = CMTimeMake(frameCount,(int32_t) 03.1);
        append_ok = [adaptor appendPixelBuffer:buffer withPresentationTime:frameTime];
        if(buffer)
            [NSThread sleepForTimeInterval:0.02];

    }else
    {
        [NSThread sleepForTimeInterval:0.1];
    }
    //time ++;
    frameCount++;
    }
    @catch (NSException *exception) {
        NSLog(@"exception---writevideo%@",exception.description);
    }
}
if (buffer) {
    CVPixelBufferRelease(buffer);
}

[videoStream markAsFinished];
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^
               {
                   [videoWriter finishWriting];

               });





-(CVPixelBufferRef) pixelBufferFromCGImage: (CGImageRef) image andSize:(CGSize) size
  {
@try{
NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
                         [NSNumber numberWithBool:YES], kCVPixelBufferCGImageCompatibilityKey,
                         [NSNumber numberWithBool:YES], kCVPixelBufferCGBitmapContextCompatibilityKey,nil];
CVPixelBufferRef pxbuffer = NULL;
CVReturn status = CVPixelBufferCreate(kCFAllocatorDefault, size.width,size.height, kCVPixelFormatType_32ARGB, (__bridge   CFDictionaryRef) options,&pxbuffer);
NSParameterAssert(status == kCVReturnSuccess && pxbuffer != NULL);
CVPixelBufferLockBaseAddress(pxbuffer, 0);
void *pxdata = CVPixelBufferGetBaseAddress(pxbuffer);
NSParameterAssert(pxdata != NULL);
CGColorSpaceRef rgbColorSpace = CGColorSpaceCreateDeviceRGB();
CGContextRef context = CGBitmapContextCreate(pxdata, size.width,
                                             size.height, 8, 4*size.width, rgbColorSpace,
                                             kCGImageAlphaNoneSkipFirst);
NSParameterAssert(context);
CGContextConcatCTM(context, CGAffineTransformMakeRotation(0));
CGContextDrawImage(context, CGRectMake(0, 0,1024,768),image);
CGColorSpaceRelease(rgbColorSpace);
CGContextRelease(context);
CVPixelBufferUnlockBaseAddress(pxbuffer, 0);
return pxbuffer;
}
@catch (NSException *exception) {
    NSLog(@"exception---pixelBufferFromCGImage%@",exception.description);
  }
 }

提前致谢。请让我知道我在哪里错了，以及我如何处理它以使其可行。

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