It consumes too much performance. Is there a more efficient way?

[usr92]

		playMutex.Lock()
		defer playMutex.Unlock()
		log.Println("detailPlay")
		defer log.Println("detailPlay end")
		sleep := 50
		lastRender := time.Now()
		fps := lib.NewFpsCounter("Frame")
		for {
			if lastRender.Add(time.Duration(sleep) * time.Millisecond).After(time.Now()) {
				time.Sleep(time.Millisecond * time.Duration(sleep))
			}
			if !libc.VlcIsPlayingVideo() || !a.detailLayout.Visible() {
				break
			}
			//get frame
			data, width, height := libc.GetVlcFrame(path)
			if width == 0 || height == 0 || len(data) == 0 {
				continue
			}
			lastRender = time.Now()
			videoFrame.Pix = data
			videoCanvas.Image = videoFrame
			videoCanvas.Refresh()
			fps.Watch()
		}

[andydotxyz]

The best idea would be to use "pprof" to see where in your app the time is being spent.

One thing you could do is change the image scale mode to "fastest" which is probably good enough for video.