Uluntu lweVideoLAN kunye neFFmpeg kutshanje lubhengeze upapasho lwe Inguqulelo yesithathu (0.3) Kwithala leencwadi le-dav1d ngokumiliselwa kwenye i-AV1 yasimahla yevidiyo yokufaka iikhowudi kwifomathi.
Ithala leencwadi le-dav1d ixhasa zonke izinto ze-AV1, kubandakanya iintlobo zokuxhasa kwangaphambili kunye nazo zonke iiparameter ukulawulwa kobunzulu bemibala okusetiweyo kwinkcazo (8, 10 kunye ne-12 bit).
Umsebenzi wethala leencwadi wavavanywa kwingqokelela enkulu yeefayile kwifomathi ye-AV1. Eyona nto iphambili kwi-dav1d kukugxila kwayo ekufezekiseni owona msebenzi uphezulu ukumisela ikhowudi kunye nokuqinisekisa umgangatho ophezulu womsebenzi kwimowudi yokufunda emininzi.
Ikhowudi yeprojekthi ibhaliwe kwi-C (C99) ngokudityaniswa kokufakwa (i-NASM / GAS) kwaye ihanjiswa phantsi kwelayisensi ye-BSD.
Ikhowudi yevidiyoI-AV1 yaphuhliswa yi-Open Media Alliance. (AOMedia), apho iinkampani ezinje ngeMozilla, Google, Microsoft, Intel, ARM, NVIDIA, IBM, Cisco, Amazon, Netflix, AMD, VideoLAN, CCN kunye neRealtek zimelwe
AV1 ibekwe njengefomathi yasimahla yokufomatha ividiyo engadingi kuhlawulwa, ephezulu ngokubonakalayo kwi-H.264 kunye ne-VP9 ngokwe-compression.
Uluhlu olupheleleyo lwezisombululo ezivavanyiweyo, ngokomndilili i-AV1 ibonelela ngenqanaba elifanayo lomgangatho ngelixa inciphisa i-bitrate nge-13% xa kuthelekiswa ne-VP9 kunye ne-17% xa kuthelekiswa ne-HEVC.
Kwinqanaba eliphezulu, inzuzo inyuka ukuya kwi-22-27% ye-VP9 ukuya kuthi ga kwi-30-43% ye-HEVC. Kuvavanyo lwe-Facebook, i-AV1 yenze iprofayile ephambili H.264 (x264) ngama-50.3%, iprofayili ephezulu H.264 nge-46.2%, kunye ne-VP9 (libvpx-vp9) ngama-34.0%.
Yintoni entsha kule nguqulo?
Ngokukhutshwa kwale nguqulo intsha yesikhombisi, ezahlukeneyo ziye zongezwa ulungiselelo olongezelelekileyo lokukhawulezisa ukumiswa kwekhowudi i vidiyo usebenzisa imiyalelo SSSE3, SSE4.1 kunye ne-AVX2.
Kunye nayo isantya sokumisela iiprosesa ze-SSSE3 zonyuswe nge-24%, nakwiinkqubo ezine-AVX2 nge-4%
Ikhowudi yokuhlanganisa eyongeziweyo yokukhawulezisa usebenzisa imiyalelo ye-SSE4.1, ukusetyenziswa okwandileyo kokusebenza ngama-26% xa kuthelekiswa nohlobo olungalungiswanga (xa kuthelekiswa nokwenza ngcono ngokusekwe kwimiyalelo ye-SSSE3, 1,5% inzuzo).
Ukongeza, ukusebenza kweekhowudi kuye kwandiswa kwizixhobo eziselfowuni kunye neeprosesa esekwe kuyilo lwe-ARM64.
Enkosi ngokusetyenziswa kwemisebenzi esebenzisa imiyalelo ye-NEON, xa kuthelekiswa nohlobo lwangaphambili, intsebenzo inyuke malunga ne-12%.
Xa kuthelekiswa nesalathiso sedekhowudi aomdec (libaom), uncedo lwe-dav1d luvakala ngakumbi xa usebenza kwimowudi enemisonto emininzi (kolunye uvavanyo, i-dav1d iphindwe ka-2-4 ngokukhawuleza). Kwimowudi eyodwa yomsonto, intsebenzo yi-10-20% eyahlukileyo.
Kubekho impumelelo ekubandakanyeni i-dav1d kwezinye iiprojekthi. Ngokuzenzekelayo i-dav1d ngoku isetyenziswa kwiChromium kunye I-Chrome 74 kunye neFirefox 67 (ngaphambili i-dav1d yayenzelwe iWindows, kodwa ngoku yayenzelwe iLinux kunye neMacOS.)
Ukuqhubeka nokusetyenziswa kwe-dav1d kwi-FFmpeg nakwi-VLC, utshintsho oluya kwi-handbrake transcoder lucwangcisiwe.
Uyifaka njani i-dav1d kwi-Linux?
Kulabo banomdla wokukwazi ukufaka le khowudi kwiinkqubo zabo, banokwenza oko ngokulandela imiyalelo esabelana ngayo ngezantsi.
Ngokubanzi kuninzi lonikezelo lweLinux, abafana abavela kwiprojekthi Lan, banikela Iphakheji yekhowudi ngokusebenzisa iphakheji ye-Snap.
Ke ngoko ukuyifaka ngale ndlela, kufuna kuphela ukuba unikezelo lwakho lunenkxaso yolu hlobo lweephakeji.
Kwisiphelo kufuneka benze lo mthetho ulandelayo:
sudo snap install dav1d --edge
ukuba Ityala labo bangabasebenzisi beArch Linux, iManjaro, iAntergos okanye nayiphi na enye into evela kuyo KwiArch Linux, banokufaka ngokuthe ngqo kwii-Arch Linux zokugcina.
Solo kufuneka ibaleke kwisiphelo sendlela lo myalelo ulandelayo
sudo pacman -S dav1d