[manca]

It's not that simple. Especially if you deal with videos that have open GOPs and have multiple B frames in the GOP. The encoders don't do so great job in those cases. Also breaking the videos up into short chunks is easier said than done -- you need to understand where it makes sense to split the video, make sure the Iframes are aligned and generally try to keep the consistent segment size -- which with very dynamic videos encoded with different types of source encoders could result in very inconsistent performance of the encoder itself across the chunks. For that reason, it's always best to have some sort of two/three pass encoding where the analysis step is integral and then based on it the actual split & encode is performed. Which of course does not work for low-latency live streaming scenarios.