Imiphakathi yeVideoLAN neFFmpeg isanda kumemezela i- ukushicilelwa kwe- inguqulo yesithathu (0.3) kusuka kumtapo wezincwadi we-dav1d ngokuqaliswa kwesinye isishumekisi sevidiyo sokufomatha samahhala se-AV1.
Umtapo wolwazi we-dav1d isekela zonke izici ze-AV1, kufaka phakathi izinhlobo zokuthuthuka ezithuthukile nawo wonke amapharamitha ukulawulwa kokujula kombala kusethwe ebucacisweni (8, 10 no-12 bit).
Umsebenzi womtapo wezincwadi uvivinywe eqoqweni elikhulu lamafayela ngefomethi ye-AV1. Isici esiyinhloko se-dav1d ukugxila ekufinyeleleni ukusebenza okuphezulu kakhulu emagama ekucinisekeni nekucinisekiswa kwelizinga lelisetulu kwemsebenti kumodi lefundvwako.
Ikhodi yephrojekthi ibhalwe ku-C (C99) ngokufakwa okuhlanganayo (i-NASM / GAS) futhi isatshalaliswa ngaphansi kwelayisense le-BSD.
Ikhodekhi yevidiyoI-AV1 yenziwe yi-Open Media Alliance. (AOMedia), lapho izinkampani ezifana neMozilla, Google, Microsoft, Intel, ARM, NVIDIA, IBM, Cisco, Amazon, Netflix, AMD, VideoLAN, CCN neRealtek zimelwe khona
AV1 ibekwe njengefomethi yokufaka ikhodi evidiyo yamahhala engadingi ukukhokhwa kwemali, ephakeme kakhulu kune-H.264 ne-VP9 maqondana nokucindezela.
Ebangeni eliphelele lezinqumo ezivivinyiwe, ngokwesilinganiso i-AV1 inikeza izinga elifanayo lekhwalithi ngenkathi inciphisa i-bitrate ngo-13% ngokuqhathaniswa ne-VP9 nange-17% ngokuqhathaniswa ne-HEVC.
Ngamanani aphakeme kakhulu, inzuzo inyuka iye kuma-22-27% we-VP9 ize ifike ku-30-43% ye-HEVC. Ekuhlolweni kwe-Facebook, i-AV1 idlule iphrofayili enkulu u-H.264 (x264) ngo-50.3%, iphrofayili ephezulu H.264 ngo-46.2%, ne-VP9 (libvpx-vp9) ngo-34.0%.
Yini okusha kule nguqulo?
Ngokukhishwa kwale nguqulo entsha yedikhoda, okuhlukahlukene kufakiwe ukwengeza okungeziwe ukusheshisa ukumiswa kwegama le- ividiyo usebenzisa imiyalo SSSE3, SSE4.1 ne-AVX2.
Kanye nayo isivinini sokuhumusha kuma-processor we-SSSE3 sikhuphuke ngama-24%, nakuzinhlelo ezine-AVX2 ngo-4%
Kungezwe ikhodi yokuhlanganisa yokusheshisa usebenzisa imiyalo ye-SSE4.1, ukusetshenziswa okwenyuse ukusebenza ngama-26% ngokuqhathaniswa nenguqulo engenziwanga (kuqhathaniswa nokwenza kahle okususelwa kumiyalo ye-SSSE3, inzuzo engu-1,5%).
Ngokwengeziwe, ukusebenza kwe-decoder kukhulisiwe kumadivayisi eselula anama-processor asuselwa ekwakhiweni kwe-ARM64.
Ngenxa yokusetshenziswa kwemisebenzi esebenzisa imiyalo ye-NEON, uma kuqhathaniswa nenguqulo yangaphambilini, ukusebenza kukhuphuke cishe ngo-12%.
Uma kuqhathaniswa ne-aoddec yesithenjwa (libaom), inzuzo ye-dav1d izwakala kakhulu lapho isebenza ngemodi enezintambo eziningi (kolunye uvivinyo, i-dav1d iphindwe ka-2-4 ngokushesha). Kumodi enentambo eyodwa, ukusebenza kuhluke ngo-10-20%.
Kube nempumelelo ekubandakanyeni i-dav1d kwamanye amaphrojekthi. Ngokuzenzakalelayo i-dav1d manje isetshenziswa ku-Chromium naku- I-Chrome 74 neFirefox 67 (phambilini i-dav1d yayinikwe amandla iWindows, kepha manje yayinikwe amandla i-Linux ne-MacOS.)
Ukuqhubeka nokusetshenziswa kwe-dav1d ku-FFmpeg naku-VLC, ukuhlelelwa ku-transcoder ye-Handbrake kuhlelwe.
Ungayifaka kanjani i-dav1d decoder ku-Linux?
Kulabo abanentshisekelo yokukwazi ukufaka le-decoder ezinhlelweni zabo, bangakwenza lokho ngokulandela imiyalo esabelana ngayo ngezansi.
Ngokuvamile ekusatshalalisweni okuningi kweLinux, abafana abavela kuphrojekthi Lan, banikele iphakethe ledekhoda ngokusebenzisa iphakethe le-Snap.
Ngakho-ke ukuyifaka ngale ndlela, kudinga kuphela ukuthi ukusatshalaliswa kwakho kusekelwe kulolu hlobo lwephakeji.
Esigungwini kufanele nje benze umyalo olandelayo:
sudo snap install dav1d --edge
para icala lalabo abangabasebenzisi be-Arch Linux, iManjaro, i-Antergos noma enye into etholakele Okwe-Arch Linux, bangafaka ngqo kusuka ezinqolobaneni ze-Arch Linux.
Solo kufanele isebenze ekugcineni umyalo olandelayo
sudo pacman -S dav1d