Vhidhiyo yeVideoLAN neFFmpeg nguva pfupi yadarika vakazivisa iyo kuburitswa kwe yechitatu vhezheni (0.3) kubva dav1d raibhurari pamwe nekuitwa kweimwe yemahara AV1 vhidhiyo yekukodha fomati dhodhi.
Raibhurari ye dav1d inotsigira ese maAV1 maficha, kusanganisira epamberi ekutsikisa mhando uye ese ma parameter kudzika kwemavara akaiswa mune yakatarwa (8, 10 uye 12 bit).
Basa reraibhurari rakaedzwa pane hombe muunganidzwa wemafaira muAV1 fomati. Chinhu chakakosha chedav1d ndiko kutarisisa mukuwana kuita kwakanyanya kuita kududzira uye kuverengera yemhando yepamusoro basa mumamita akawanda akaverengwa.
Iyo kodhi yeprojekiti yakanyorwa muC (C99) ine assembler insert (NASM / GAS) uye inoparadzirwa pasi pezenisi reBSD.
Iyo vhidhiyo codeco AV1 yakagadzirwa neOpen Media Alliance. (AOMedia), mune makambani akadai seMozilla, Google, Microsoft, Intel, ARM, NVIDIA, IBM, Cisco, Amazon, Netflix, AMD, VideoLAN, CCN uye Realtek inomiririrwa.
AV1 yakamisikidzwa semahara yekuwana vhidhiyo encoding fomati iyo isingade kubhadharwa kwemari, iyo inonyanya kukwirira kupfuura H.264 uye VP9 maererano nekomputa.
Nezere yakazara izere yezvisarudzo zvakaedzwa, paavhareji AV1 inopa iyo yakafanana nhanho yemhando uchidzikisa bitrate ne13% uchienzaniswa neVP9 uye ne17% uchienzaniswa neHEVC.
Pamitengo yakakwira, iyo pfuma inowedzera kusvika 22-27% yeVP9 uye inosvika 30-43% yeHEVC. Mune bvunzo dzeFacebook, AV1 yakadarika yakakurisa mbiri H.264 (x264) ne50.3%, yepamusoro H.264 ne46.2%, uye VP9 (libvpx-vp9) ne34.0%.
Chii chitsva mushanduro iyi?
Nokuburitswa kweshanduro iyi nyowani yedhisodhi, siyana yekuwedzera optimizations yekumhanyisa kududzira kwe vhidhiyo uchishandisa rairo SSSE3, SSE4.1 uye AVX2.
Pamwe chete nazvo kududzira kumhanyisa pane SSSE3 processors yakawedzera ne24%, uye mumasisitimu ane AVX2 ne4%
Yakawedzera kodhi yekuunganidza yekumhanyisa uchishandisa SSE4.1 mirairo, iko kushandiswa kwakawedzera mashandiro ne26% zvichienzaniswa neiyo isina-optimized vhezheni (zvichienzaniswa nemagadziriso akavakirwa pane SSSE3 mirairo, 1,5% kuwana).
Uye zvakare, mashandiro edhisodhi akawedzerwa pane nharembozha nemaprosesa akavakirwa pane iyo ARM64 kuvaka.
Kutenda iko kushandiswa kwemabasa anoshandisa mirairo yeNEON, zvichienzaniswa neshanduro yapfuura, iko kuita kwawedzera neanenge gumi nemaviri muzana.
Zvichienzaniswa nereferensi decoder aomdec (libaom), mukana we dav1d unonzwika zvakanyanya kana uchishanda mune yakawanda-tambo modhi (mune kumwe kuyedza, dav1d iri 2-4 nguva nekukurumidza). Mune imwechete-yakasungirirwa modhi, mashandiro ari 10-20% akasiyana.
Pakave nekubudirira mukubata dav1d mune mamwe mapurojekiti. Nechekuita dav1d ikozvino yashandiswa muChromium uye Chrome 74 uye Firefox 67 (yaimbove dav1d yakagoneswa yeWindows, asi ikozvino yakagoneswa kuLinux uye macOS.)
Kuenderera mberi kwekushandisa dav1d muFFmpeg uye VLC, shanduko kune Handbrake transcoder inorongwa.
Maitiro ekuisa dav1d decoder paLinux?
Kune avo vanofarira kugona kuisa ichi chinodhindaina mumasisitimu avo, vanogona kuzviita nekutevera rairo dzatinogovana pazasi.
Kazhinji yezvakawanda zvekugoverwa kweLinux, ivo varume vanobva kuchirongwa Lan, vape iyo decoder pasuru kuburikidza neiyo Snap package.
Saka kuti umise nenzira iyi, zvinongoda kuti kugovera kwako kuve nerutsigiro rwemhando iyi yepakeji.
Mune terminal vanongofanira kuita unotevera kuraira:
sudo snap install dav1d --edge
Para nyaya yeavo vanoshandisa Arch Linux, Manjaro, Antergos kana chero chimwe chinobva YeArch Linux, ivo vanokwanisa kuisa zvakananga kubva kuArch Linux repositories.
Solo inofanira kumhanya mune inouraya iwo unotevera kuraira
sudo pacman -S dav1d