Ukukhishwa komtapo wezincwadi we-SVT-AV1 1.5 (Scalable Video Technology AV1) kushicilelwe ngokusetshenziswa kwesishumeki nesikhiphi sefomethi yombhalo wekhodi wevidiyo ye-AV1, ukuze kusheshiswe izindlela zehardware parallel computing ekhona kuma-Intel CPUs esimanjemanje. Le phrojekthi idalwe ngabakwa-Intel ngokubambisana ne-Netflix ngenhloso yokufinyelela izinga lokusebenza elifanele ukudluliswa kwekhodi kwevidiyo lapho undiza futhi isetshenziswe kumasevisi wevidiyo-on-demand (VOD). Njengamanje, ukuthuthukiswa kwenziwa ngaphansi kwe-Open Media Alliance (AOMedia), eyengamele ukuthuthukiswa kwefomethi yombhalo wevidiyo we-AV1. Ngaphambilini, iphrojekthi yathuthukiswa ngaphakathi kohlaka lwephrojekthi ye-OpenVisualCloud, ephinde ithuthukise izifaki khodi ze-SVT-HEVC kanye ne-SVT-VP9. Ikhodi isatshalaliswa ngaphansi kwelayisensi ye-BSD.
Ukuze usebenzise i-SVT-AV1, iphrosesa ye-x86_64 enosekelo lwemiyalo ye-AVX2 iyadingeka. Ukufaka ikhodi ukusakaza kwe-AV10 kwe-1-bit ngekhwalithi ye-4K kudinga u-48 GB we-RAM, 1080p - 16 GB, 720p - 8 GB, 480p - 4 GB. Ngenxa yobunkimbinkimbi bama-algorithms asetshenziswa ku-AV1, ukubhala ngekhodi le fomethi kudinga izinsiza eziningi kakhulu kunamanye amafomethi, okungakuvumeli ukusetshenziswa kwesishumeki se-AV1 esijwayelekile sokudlulisa amakhodi ngesikhathi sangempela. Isibonelo, isifaki khodi sesitoko esisuka kuphrojekthi ye-AV1 sidinga izibalo eziphindwe izikhathi ezingu-5721, 5869 nezingu-658 uma kuqhathaniswa nezishumeki ze-x264 ("eziyinhloko"), x264 ("eziphezulu") nezishumeki ze-libvpx-vp9.
Phakathi kwezinguquko ekukhishweni okusha kwe-SVT-AV1:
- Ukwehliswa kwekhwalithi/isivinini kuthuthukisiwe, ngenxa yalokho okusethiwe ngaphambilini kwe-M1-M5 kusheshiswe ngo-15-30%, nokusethwa kuqala kwe-M6-M13 ngo-1-3%.
- Kwengezwe ukusetha ngaphambilini kwe-MR (--preset -1) okuthiwa kuhlinzeka ngekhwalithi yesithenjwa.
- Ukusebenza kokusetha ngaphambilini kwe-M8-M13 kumodi yombhalo wekhodi yokubambezeleka okuphansi kuthuthukisiwe.
- Ukwesekwa okwengeziwe kokukhethwa okuguquguqukayo kwezakhiwo zokubikezela izinguquko zesigaba sendawo "miniGOP" (Iqembu Lezithombe) zokulungiselelwa kokufinyelela okungahleliwe, okunikwe amandla ngokuzenzakalela ekusetheni kusengaphambili kuze kufike ku-M9. Kungenzeka futhi ukucacisa usayizi omncane wokuqala we-miniGOP ukusheshisa ukulayisha kuqala.
- Amandla okushintsha izici zokukala ze-lambda kulayini womyalo anikeziwe.
- I-plugin ye-gstreamer isibhalwe kabusha.
- Kwengezwe ikhono lokweqa inombolo ethile yozimele ngaphambi kokuqala ukubhala ngekhodi.
- Ukuhlanzwa okubalulekile kwezinto eziguquguqukayo ezingasetshenzisiwe kanye nemisebenzi emile yenziwe, futhi ukuphawula kukhodi kufomethwe kabusha. Usayizi wamagama aguquguqukayo wehlisiwe ukuze kwenziwe ikhodi ifundeke kalula.
Source: opennet.ru