Al'ummomin VideoLAN da FFmpeg sun buga sakin ɗakin karatu na dav1d 1.0.0 tare da aiwatar da wani zaɓi na kyauta don tsarin rikodin bidiyo na AV1. An rubuta lambar aikin a cikin C (C99) tare da abubuwan da ake sakawa (NASM/GAS) kuma an rarraba a ƙarƙashin lasisin BSD. Taimako don gine-ginen x86, x86_64, ARMv7 da ARMv8, da tsarin aiki FreeBSD, Linux, Windows, macOS, Android da iOS an aiwatar da su.
Laburaren dav1d yana goyan bayan duk fasalulluka na AV1, gami da ci-gaban nau'ikan samfura da duk ma'aunin sarrafa zurfin launi da aka bayyana a cikin ƙayyadaddun bayanai (8, 10 da 12 bits). An gwada ɗakin karatu akan babban tarin fayiloli a cikin tsarin AV1. Muhimmin fasalin dav1d shine mayar da hankali ga cimma mafi girman aiki mai yuwuwar yankewa da kuma tabbatar da ingantaccen aiki a yanayin zaren da yawa.
A cikin sabon sigar:
- An sake fasalin tsarin tsarin multithreading, gami da sarrafa zaren atomatik.
- Ƙara ikon haɓaka ƙididdiga ta amfani da umarnin vector AVX-512. Ingantattun abubuwan ingantawa a baya dangane da umarnin SSE2 da AVX2.
- An gabatar da sabon API don sauƙaƙe amfani da GPUs don haɓakawa.
- An ƙara API don samun bayani game da firam ɗin da ke da matsala wajen yankewa.
Bari mu tunatar da ku cewa AV1 codec na bidiyo ya fito ne daga Open Media Alliance (AOMedia), wanda ke wakiltar kamfanoni irin su Mozilla, Google, Microsoft, Intel, ARM, NVIDIA, IBM, Cisco, Amazon, Netflix, AMD, VideoLAN, Apple. , CCN da Realtek. AV1 yana matsayi a matsayin samuwa a bainar jama'a, tsarin rikodin rikodin bidiyo na kyauta mara sarauta wanda ke gaban H.264, H.265 (HEVC) da VP9 dangane da matakan matsawa. A cikin kewayon shawarwarin da aka gwada, a matsakaicin AV1 yana ba da matakin inganci iri ɗaya yayin da rage bitrates da 13% idan aka kwatanta da VP9 da 17% ƙasa da HEVC. A babban bitrates, riba yana ƙaruwa zuwa 22-27% don VP9 kuma zuwa 30-43% don HEVC. A cikin gwaje-gwajen Facebook, AV1 ya fi babban bayanin martaba H.264 (x264) da 50.3%, babban martabar H.264 ta 46.2%, da VP9 (libvpx-vp9) da 34%.
source: budenet.ru