Pink Line: Video FPS — Calculated from the video file's internal timestamps. It represents the intended playback speed as dictated by the video stream itself.
Blue Line: Display FPS — Calculated from physical screen flips. It represents the actual frame rate presented on the monitor. If the blue line drops below the pink line, frames are being dropped or displayed slower than intended.
2 videos: playing slowly
3 Videos: playing slowly
2 videos: playing correctly
2 videos: playing slowly
2 videos: playing slowly