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Modern video codecs use data in frames before and sometimes after the current frame to compress more:

https://en.wikipedia.org/wiki/Group_of_pictures

whereas analog media stored full resolution versions of every frame.

Seeking is much easier when you can pick any random location and have all the data right there ready to use, and you don't have to backtrack and try to recreate things from previous frames.



That's true. Hence me asking for "hardware acceleration" to improve the speed to real-time if possible.




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