isFrameNew not working as expected on OSX.

On the master branch ...

Even when the update rate is set higher than the video fps, isFrameNew almost always returns true (sometimes it returns false upon looping).

#pragma once


#include "ofMain.h"


class ofApp: public ofBaseApp
{
public:
    void setup()
    {
        ofSetFrameRate(60);

        player.load("fingers.mov");
        player.play();
        player.setLoopState(OF_LOOP_NORMAL);

        float fps = player.getTotalNumFrames() / player.getDuration();

        std::cout << fps << std::endl;
    }

    void update()
    {
        player.update();

        if (player.isFrameNew() == false)
        {
            cout << "Got same frame." << endl; // we should see this often ...
        }

    }


    void draw()
    {
        ofDrawBitmapStringHighlight(ofToString(ofGetFrameRate()), 14, 14);
        player.draw(0, 0);
    }


    ofVideoPlayer player;

};

Start by reproducing the issue in the shown ofApp update() loop on OSX, using ofVideoPlayer with a video whose FPS is below the application update rate. Trace how player.update() determines isFrameNew(), including behavior when looping. Done means isFrameNew() returns false when no new video frame is available and remains correct across loop boundaries.