Device specific crash

[deftsofttester123]

App got crashed when trying to implement GPU video filter (GPUImageGrayscaleFilter, GPUImageMissEtikateFilter, GPUImageSepiaFilter etc) in multiple videos. I am using a method which is calling recursively from completion block. And it get crashed during implementation of GPU filter in between of any video and gives the message "Received memory warning.

CODE:
-(void)implementGPU_EffectOnVid:(int)effectToApply noOfSong:(int)songNo{
//getting asset for managing sound of the asset
AVURLAsset *videoAsset = [AVURLAsset URLAssetWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"%@",[[self.arrSongsForAddingEffects objectAtIndex:songNo] valueForKey:@"assetGalleryURL"]]] options:[NSDictionary dictionaryWithObject:[NSNumber numberWithBool:YES] forKey:AVURLAssetPreferPreciseDurationAndTimingKey]];
//VIDEO TRACK
NSArray *tracks = [videoAsset tracksWithMediaType:AVMediaTypeVideo];
AVAssetTrack *videoTrack = [tracks objectAtIndex:0];
CGAffineTransform videoTransform = videoTrack.preferredTransform;
//adding GPU filter in video
movieFile = [[GPUImageMovie alloc] initWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"%@",[[self.arrSongsForAddingEffects objectAtIndex:songNo] valueForKey:@"assetGalleryURL"]]]];
filterForVideo = [[GPUImageSepiaFilter alloc] init];
[movieFile addTarget:filterForVideo];
//generate the random number.
int randNum = rand() % (1000 - 1) + 1;
//store merged video is in temprary directory
NSString *pathToMovie = NSTemporaryDirectory();
unlink([pathToMovie UTF8String]);
NSString *completePathToMovie = [pathToMovie stringByAppendingPathComponent:[NSString stringWithFormat:@"GPU_Video%d.mp4",randNum]];
NSURL *movieURL = [NSURL fileURLWithPath:completePathToMovie];
NSLog(@"value of path %@",pathToMovie);
movieWriter = [[GPUImageMovieWriter alloc] initWithMovieURL:movieURL size:CGSizeMake(videoTrack.naturalSize.width,videoTrack.naturalSize.height)];
[filterForVideo addTarget:movieWriter];
movieWriter.transform = videoTransform;
movieWriter.shouldPassthroughAudio = YES;
//condition for managing check whether the video consist audio or not
if ([[videoAsset tracksWithMediaType:AVMediaTypeAudio] count] > 0) {
movieFile.audioEncodingTarget = movieWriter;
NSLog(@"audio present");
} else{ //no audio
movieFile.audioEncodingTarget = nil;
NSLog(@"no audio");
}
//method implementing gpu filter in video
[movieFile enableSynchronizedEncodingUsingMovieWriter:movieWriter];
[movieWriter startRecording];
[movieFile startProcessing];
//block for completion of implementing filters
__block BOOL completeRec = NO;
__unsafe_unretained typeof(self) weakSelf = self;
__block int effectToApplyInVideo = noOfEffect;
[movieWriter setCompletionBlock:^{
[weakSelf->filterForVideo removeTarget:weakSelf->movieWriter];
[weakSelf->movieWriter finishRecording];
if (!completeRec) {
completeRec = YES;
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
[[GPUImageContext sharedFramebufferCache] purgeAllUnassignedFramebuffers];

                        //when last video implemented video filter
                        if (songNo == self.arrSongsForAddingEffects.count -1)  {
                            [weakSelf hideActivityIndicator];
                            [weakSelf navigateView];
                        } else{
                            //increasing varible for getting next song
                            noOfSongForApplyingFilter++;
                         //calling this method for implementing GPU Effect in next song
                            [weakSelf implementGPU_EffectOnVid:effectToApplyInVideo noOfSong:noOfSongForApplyingFilter];
                        }
                    }];
                }
            }];

}