self.movieFile = [[GPUImageMovie alloc] initWithURL:self.assetURL];
    self.movieFile.runBenchmark = YES;
    self.movieFile.playAtActualSpeed = NO;
    self.filter = [[GPUImageLightenBlendFilter alloc] init];

    [self.movieFile addTarget:self.filter];

    NSString *pathToMovie = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/video.mp4"];
    unlink([pathToMovie UTF8String]); // If a file already exists, AVAssetWriter won't let you record new frames, so delete the old movie
    NSURL *movieURL = [NSURL fileURLWithPath:pathToMovie];

    AVAssetTrack *videoAssetTrack = [[self.asset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
    self.movieWriter = [[GPUImageMovieWriter alloc] initWithMovieURL:movieURL size:CGSizeMake(videoAssetTrack.naturalSize.width, videoAssetTrack.naturalSize.height)];
    [self.filter addTarget:self.movieWriter];

    // Configure this for video from the movie file, where we want to preserve all video frames and audio samples
    self.movieWriter.shouldPassthroughAudio = YES;
    self.movieFile.audioEncodingTarget = self.movieWriter;
    [self.movieFile enableSynchronizedEncodingUsingMovieWriter:self.movieWriter];

    [self.movieWriter startRecording];
    [self.movieFile startProcessing];

    __weak typeof(self) weakSelf = self;
    [self.movieWriter setCompletionBlock:^{
        [weakSelf.filter removeTarget:weakSelf.movieWriter];
        [weakSelf.movieWriter finishRecording];

        dispatch_async(dispatch_get_main_queue(), ^{
            weakSelf.isFiltered = YES;
            weakSelf.filteredAsset = weakSelf.movieFile.asset;

            weakSelf.playerItem = [AVPlayerItem playerItemWithAsset:weakSelf.movieFile.asset];
            weakSelf.player = [AVPlayer playerWithPlayerItem:weakSelf.playerItem];
            [weakSelf.playerView setPlayer:weakSelf.player];
        });


    }];