It should be possible to create a 4k60 video with gops set up so it can be decoded as a 30 fps video by just skipping every other frame.
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Replying to @ID_AA_Carmack
While it doesn't sound impossible (I love doing such tricks myself), I think such files would be very sensitive to bugs, so better not ;)
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Replying to @angealbertini @ID_AA_Carmack
IBPBPBPBPBPBPBPBPB... not that big a deal honestly, that's a pretty standard structure
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Replying to @angealbertini @rygorous and
I co-authored an Mpeg2 encoder a bit more than a decade ago which was capable of doing IBPBPBP...so oldschool mainstream really..
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Replying to @anders_fogh @angealbertini and
Yeah, that sounds like a bog standard picture structure to me.
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Just did a quick PoC. Works fine, totally trivial to implement.https://gist.github.com/marcan/9e33fedbf1a5386378b7fa00cdcc0695 …
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Replying to @marcan42 @anders_fogh and
Of course you'd actually want encoder support for constraining the output while allowing more flexible GOP structures, for efficiency.
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