ofxTextureRecorder - memory build up

ofApp.cpp

#include "ofApp.h"

ofTexture frames[60];
int counter;
bool bDone;
//--------------------------------------------------------------
void ofApp::setup(){
    fbo.allocate(ofGetWidth(), ofGetHeight(), GL_RGB);
    
    ofxTextureRecorder::Settings settings(fbo.getTexture());
    settings.imageFormat = OF_IMAGE_FORMAT_JPEG;
    settings.numThreads = 12;
    settings.maxMemoryUsage = 9000000000;
    recorder.setup(settings);
    
    counter = 0;
    bDone = false;
}

//--------------------------------------------------------------
void ofApp::update(){
    fbo.begin();
    ofClear(0,255);
    ofDrawCircle(ofGetFrameNum()*4, ofGetWidth()/2, 50);
    fbo.end();
    
    if(ofGetFrameNum()>0 && counter < 60){
        ofPixels pix;
        fbo.readToPixels(pix);
        ofTexture tex;
        tex.loadData(pix);
        frames[counter] = tex;
        counter++;
        //        recorder.save(tex); //fbo.getTexture());
    }
    if(counter == 60 && bDone == false){
        for(int i=0; i<60; i++){
            recorder.save(frames[i]);
        }
        bDone = true;
    }
    
    
}

//--------------------------------------------------------------
void ofApp::draw(){
    fbo.draw(0,0);
    
    ofDrawBitmapStringHighlight("counter "+ofToString(counter), 20,20);
    if(ofGetFrameNum()%60==0){
        cout << ofGetFrameRate() << endl;
        cout << "texture copy: " << recorder.getAvgTimeTextureCopy() << endl;
        cout << "gpu download: " << recorder.getAvgTimeGpuDownload() << endl;
        cout << "image encoding: " << recorder.getAvgTimeEncode() << endl;
        cout << "file save: " << recorder.getAvgTimeSave() << endl;
    }
    
}

//--------------------------------------------------------------
void ofApp::keyPressed(int key){
    
}

//--------------------------------------------------------------
void ofApp::keyReleased(int key){
    
}

//--------------------------------------------------------------
void ofApp::mouseMoved(int x, int y ){
    
}

//--------------------------------------------------------------
void ofApp::mouseDragged(int x, int y, int button){
    
}

//--------------------------------------------------------------
void ofApp::mousePressed(int x, int y, int button){
    
}

//--------------------------------------------------------------
void ofApp::mouseReleased(int x, int y, int button){
    
}

//--------------------------------------------------------------
void ofApp::mouseEntered(int x, int y){
    
}

//--------------------------------------------------------------
void ofApp::mouseExited(int x, int y){
    
}

//--------------------------------------------------------------
void ofApp::windowResized(int w, int h){
    
}

//--------------------------------------------------------------
void ofApp::gotMessage(ofMessage msg){
    
}

//--------------------------------------------------------------
void ofApp::dragEvent(ofDragInfo dragInfo){ 
    
}