16-core 3.5ghz computer from 2018 with 8gb GPU running software from 2020 vs 1-core 900mhz computer from 1999, no GPU, emulated at less than full speed, running software from 2002pic.twitter.com/0sbZJJHidm
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why I re-encoded it. but it's not an excuse for the modern software. there's so much computing power in this machine. it could easily make scrubbing responsive if it wanted to. (and some software can.) the people who made it just don't care enough.
It's not possible to make scrubbing universally responsive in h.264 except post facto by caching the hell out of everything. Keyframe intervals can be arbitrarily long and smooth scrubbing requires being able to decode one whole GOP per screen frame.
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i've got 8gb of video memory and hundreds of milliseconds between clicking the mouse button down and moving the playhead. and even updating the player window every 100 milliseconds would be a huge improvement.
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if you look at these old players they are actually doing all of these dirty tricks to make things responsive that you may be writing off in your head as not worth it.
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At a typical GOP interval of 30, you need 30 times the CPU power required to decode a video normally for smooth scrubbing to arbitrary frames. GOPs can be even larger than that.
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the computer on the left is 500 times more powerful just in CPU than the computer on the right
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