Ukukhishwa kwe-dav1d 0.7, idekhoda ye-AV1 evela kumaphrojekthi we-VideoLAN kanye ne-FFmpeg

Imiphakathi ye-VideoLAN ne-FFmpeg eshicilelwe ukukhishwa komtapo wezincwadi we-dav1d 0.7.0 ngokusetshenziswa kwesinye isiqophi sefomethi yamahhala yokufaka ikhodi yevidiyo AV1. Ikhodi yephrojekthi ibhalwe ku-C (C99) ngokufakwa komhlangano (NASM/GAS) kanye isatshalaliswa ngu ngaphansi kwelayisensi ye-BSD. Usekelo lwezakhiwo ze-x86, x86_64, ARMv7 kanye ne-ARMv8, kanye ne-Linux, Windows, macOS, Android kanye nezinhlelo zokusebenza ze-iOS ziyasetshenziswa.

Umtapo wezincwadi we-dav1d usekela zonke izici ze-AV1, kuhlanganise nokubukwa okuthuthukile amasampula amancane kanye nawo wonke amapharamitha okulawula ukujula kombala ashiwo ekucacisweni (8, 10 kanye no-12 bits). Ilabhulali ihlolwe eqoqweni elikhulu lamafayela ngefomethi ye-AV1. Isici esiyinhloko se-dav1d ukugxila kwayo ekufinyeleleni ukusebenza kokukhipha amakhodi okuphezulu kakhulu nokuqinisekisa umsebenzi wekhwalithi ephezulu ngemodi enezintambo eziningi.

В inguqulo entsha:

• Ukusebenza kokuqaliswa kwe-refmv (Dynamic Reference Motion Vector Prediction) kukhuphuke cishe ngo-12% kuyilapho kunciphisa ukusetshenziswa kwenkumbulo cishe ngama-25%;
• Ukuqaliswa kokuthuthukiswa okuqondene nezakhiwo ezithile ze-ARM64 sekucishe kuqedwe, kuhlanganisa imisebenzi eminingi lapho kusebenza ngokujula kombala okungu-8, 10 kanye no-12;
• Kwengezwe isihlungi se-CDEF kusetshenziswa imiyalo ye-AVX-512;
• Kungezwe ukulungiselelwa okusha okusekelwe ku-AVX2 kanye nemiyalelo ye-SSSE3;
• Insiza ye-dav1dpla ithuthukise ukwesekwa kokusebenza ngokujula kombala okungu-10-bit, amafomethi amaphikseli angewona angu-4:2:0 kanye nokucindezelwa komsindo wedijithali ku-GPU.

Khumbula ukuthi ikhodekhi yevidiyo AV1 ithuthukiswe umbimbi Vula imidiya (AOMedia), ehlanganisa izinkampani ezifana ne-Mozilla, Google, Microsoft, Intel, ARM, NVIDIA, IBM, Cisco, Amazon, Netflix, AMD, VideoLAN, Apple, CCN kanye ne-Realtek. I-AV1 ibekwe njengefomethi yombhalo wekhodi wevidiyo etholakala esidlangalaleni, engakhokhelwa mahhala edlula i-H.264 ne-VP9 ngokwezinga lokuminyanisa. Kulo lonke ububanzi bezinqumo ezihloliwe, ngokwesilinganiso i-AV1 iletha izinga elifanayo lekhwalithi kuyilapho yehlisa ama-bitrate ngo-13% uma kuqhathaniswa ne-VP9 kanye no-17% ngaphansi kune-HEVC. Kuma-bitrate aphezulu, inzuzo ikhuphuka ibe ngu-22-27% ye-VP9 futhi iye ku-30-43% ye-HEVC. Ezivivinyweni ze-Facebook, i-AV1 yedlule iphrofayili eyinhloko engu-H.264 (x264) ngo-50.3% ngokwezinga lokuminyanisa, iphrofayili ephezulu engu-H.264 ngo-46.2%, kanye ne-VP9 (libvpx-vp9) ngo-34.0%.

Source: opennet.ru