I have two, at first glance very similar mp4 files (A & B), each of them created by different capture software.
|A.mp4||Elgato 4K Capture Utility||h.264||2560x1440||60||106Mb/s|
I noticed that scrubbing video A is very smooth while scrubbing video B is extremely choppy.
This video illustrates the difference. Note that althought for demonstration purpose I've used DaVinci Resolve software, the same scrubbing performance is present in other programs e.g. VLC Player.
I would like to understand what is causing this difference in scrubbing performance. Looking at task manager graphs, it seems like video B is more complex to decode but I have no idea why.