On Fri, Dec 24, 2021 at 07:30:11PM +0100, Andreas Rheinhardt wrote: > Michael Niedermayer: > > On Fri, Dec 24, 2021 at 04:23:32AM +0100, Andreas Rheinhardt wrote: > >> There are no encoders for interlaced dct that support 4:4:4. > > > > i dont remember why its not supported but > > why not add 4:4:4 interlaced dct support ? > > > > just thinking as you already work on the code, that would seem to me > > the "more interresting" route than to optimize that out > > > > nothing againt this patch of course, thats fine too > > > > thx > > [...] > > > > There are two encoders that support interlaced DCT: mpeg2video and > mpeg4. Our encoder for the former supports 420 and 422; the format also > allows 444. I don't really know how much is missing for supporting this > (it's probably more than just hardcoding a third chroma format in > ff_mpeg1_encode_mb()). And honestly, I don't really want to reread the > mpeg-2 spec to find out, because it is nearly 2022 and MPEG-2 is > obsolete and legacy.
our decoder should support 444 i dont remember anything special but i agree, it makes little sense for a old format unless one enjoys doing it thx [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Those who are too smart to engage in politics are punished by being governed by those who are dumber. -- Plato
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