Get all frames of Video IOS 6

Question

I would like to get all frames of a Video in iOS6 into NSArray. I use this code:

-(void) getAllImagesFromVideo
{
   imagesArray = [[NSMutableArr         


        

Answer 1

You need to:

1. use CGImageRelease as @zimmryan mentioned
2. use a block of @autoreleasepool in your loop
3. do not store the images in the memory, store them in your Document Directory

This is how I do it: (notice I use the sync version for extracting images, it shouldn't matter if you choose the async version)

AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:url options:nil];
AVAssetImageGenerator *generator = [[AVAssetImageGenerator alloc] initWithAsset:asset];
generator.requestedTimeToleranceAfter =  kCMTimeZero;
generator.requestedTimeToleranceBefore =  kCMTimeZero;
for (Float64 i = 0; i < CMTimeGetSeconds(asset.duration) *  FPS ; i++){
  @autoreleasepool {
    CMTime time = CMTimeMake(i, FPS);
    NSError *err;
    CMTime actualTime;
    CGImageRef image = [generator copyCGImageAtTime:time actualTime:&actualTime error:&err];
    UIImage *generatedImage = [[UIImage alloc] initWithCGImage:image];
    [self saveImage: generatedImage atTime:actualTime]; // Saves the image on document directory and not memory
    CGImageRelease(image);
  }
}

EDIT:

you should always consider using @autoreleasepool when creating alot of temporary objects (see https://developer.apple.com/library/mac/documentation/cocoa/conceptual/memorymgmt/articles/mmAutoreleasePools.html)