Guqula AV1 kuya JPG

Guqula Eyakho AV1 kuya JPG amafayela kalula

Khetha amafayela akho

*Amafayela asusiwe ngemva kwamahora angu-24

Guqula amafayela afinyelela ku-1 GB mahhala, abasebenzisi be-Pro bangaguqula amafayela afinyelela ku-100 GB; Bhalisa manje

Ukulayisha

Indlela yokuguqula AV1 kuya JPG

Isinyathelo 1: Layisha eyakho AV1 amafayela usebenzisa inkinobho engenhla noma ngokuhudula bese uphonsa.

Isinyathelo 2: Chofoza inkinobho ethi 'Guqula' ukuze uqale ukuguqulwa.

Isinyathelo 3: Landa i-version yakho JPG amafayela

AV1 kuya JPG Imibuzo Evame Ukubuzwa Yokuguqulwa

Ngiyikhipha kanjani ifreyimu ngayinye kusuka ku AV1 njenge JPG izithombe?

Layisha phezulu ihele AV1 futhi umguquli ubonisa isikhethi sefreyimu-sokukhipha: nganoma iyiphi ifreyimu ye-Nth, amafreyimu ezikhathini ezicacisiwe, noma ifreyimu eyodwa ngesekondi. Ifreyimu ngayinye ekhethiwe ikhishwa ku-AV1 umsinga wevidiyo, ibhalwe njengehele JPG elilodwa, futhi iqoqwe njenge-ZIP yokulayisha ngezansi. AV1 yi-video codec engekho emthethweni ye-Alliance for Open Media ekhishwa ngo-2018 njengengxenye yokulandela i-VP9. I-JPG iyisimo se-JPEG esijwayelekile kusukela ngo-1992, futhi ngemuva kweminyaka emithathu ihlala iyisimo esisetshenziswa amakhamera amaningi namanye amawebhusayithi asebenzisa ama-photos.

Ingabe izihloko ezingezansi zizovela kuma-JPG amafreyimu engikhiphayo?

Akunakwenzeka uma beyi-subtitle track engokoqobo. AV1 igcina izihloko ezingezansi njenge-stream yabo futhi umdlali uzobasusa phezu kwesithombe ngesikhathi sokudlala, ngakho ifreyimu eqoshiwe umguquli ubhala ngaphandle njenge-JPG ine-pixels ehlanzekile ngaphansi. Izihloko ezingezansi eziboshwe kwividiyo ngaphambi kokuba ibe yi-AV1 ziyinkinga ehlukile — lapho ziyingxenye yesithombe futhi yonke ifreyimu ekhishwa igcina izithombe.

Ingabe ngizokhipha i JPG kusuka kusiqephu ngasinye se-AV1?

Akunakunqoba, kodwa i AV1 iyenza kube lula: amaphawu esigaba agcinwa ebhokisini njengezipho zosuku, ngakho funda uhlu lwesigaba ngaphandle kwefayela bese ufaka amahora ezindaweni zesiqephu. Uthola JPG ngasinye sesigaba, ngokulandelelana, okuyindlela ejwayelekile yokwakha izithonjana zokurekhoda okude. Ama-sources anezimpawu zesigaba azishiya ukhetha izimo ngemehlo endaweni. AV1 inikeza cishe 30% engcono ucindezelo kuna H.264 esezingeni elifanayo futhi ithatha akukho izinkokhelo izitifiketi, okuyinto kungani YouTube ne Netflix push it.

Yini isilungiselelo sekhwalithi okufanele ngisebenzise ku-JPG?

Umgangatho 85 ulungile futhi usetshenziswa uma ungashintshanga - ubukeka ungafani nomthombo kude kakhulu, kuncane kakhulu kuncane kunesithupha sesimo esifanayo. Chofoza ku 95 nganoma yini ezoguqulwa noma iphrintwe, bese ukhuphuka ku 70 ngezithombe ezincane lapho ubukhulu bulawula khona. I-JPG ilahlekelwa yisimo: isithombe siguqulwa nge-DCT, silinganiselwe, futhi sikhonjiswa nge-entropiya, nge-nobhu wobude olawula ukuthi yini elahlekile.

Ngasiphi isixazululo izithombe ezikhishwayo JPG ziphuma khona?

Isinqumo esifanayo njengesisuka ku AV1: 1080p AV1 ikhiqiza amafreyimu angama-1920x1080 JPG, 4K AV1 ikhiqiza amafreyimu angama-3840x2160 JPG. Umguquli awukhuphuli noma awukhuphuli isampula — ama-pixel alinganiselwa ngokuqondile kusuka ku-frame e-decoded. Sebenzisa /resize-image/ ngemuva kokukhishwa uma ufuna amathumbnails amancane.

Ingabe ngizokhipha ifreyimu ngayinye ye AV1 njenge JPG?

Yebo, kodwa qaphela inani lefayela - i-30 fps 1-minithi AV1 ikhiqiza amafreyimu angama-1,800 JPG. Siwafaka ngaphakathi kohele olulodwa lwe-ZIP ngokuzenzakalela. Kweziclips ezide, khetha "1 ngesekondi" esisetshenzisiwe (amafreyimu angama-60 ngomzuzu) noma khetha ama-timestamps athile. Ihora lama-AV1 nganoma iyiphi ifreyimu lizokhiqiza izithombe ezingu-~100,000 JPG.

Ingabe ama-JPG amafreyimu azogcina umbala AV1 wokuhlanganiswa?

Yebo — umbala uqokwa nge-matrix efanayo etholakalayo AV1 umsuka we-stream ubonisa (BT.709 for HD, BT.2020 for 4K HDR). Ama-HDR asuka ku-tone-mapped ku-SDR uma ekhishwa ku-JPG angagcina ama-HDR pixel ranges ngokusemthethweni (JPG, PNG-8). Cindezela i-high-bit PNG-16 noma i-TIFF uma ufuna ukugcina ubukhulu obubanzi be-dynamic range.

Ingabe incane ifreyimu ekhishwayo JPG kwidiski?

Kuxhomekeka kusinqumo kanye nokukhetha kwe-JPG codec: ifreyimu ye-1080p PNG iyisi-2-5 MB engalahleki, i-1080p JPG esezingeni le-85 iyisi-200-500 KB. Yandisa ngokubalwa kwefreyimu ukuze usize i-ZIP — ekugcineni, ukukhipha i-PNG ngayinye yefreyimu yemizuzu engu-10 1080p AV1 kulinganiselwa ku-50 GB futhi kuhlukaniswe ngezi-ZIPs eziningi.

Ingabe i-JPG ekhishwayo igcina i-EXIF metadata yekhamera?

I AV1 i Container ayihambisani ne-EXIF ye-frame ngayinye ngendlela ikhamera ehlala khona eyenza ngayo, ngakho i JPG amafayela aphuma nge-EXIF blocks engenanto. Umguquli ufaka `creation_time` indawo ekhombisa i-source frame timestamp, ngakho ungaphinde uhlela i-bundle ngendlela ye-chronological noma ulinganise nesihloko esingezansi / izihloko zezinkomba.

Ithatha isikhathi esingakanani ukukhishwa kwefreyimu kusuka ku AV1 kuya ku JPG?

Ukususa ifreyimu kushesha - 20-30% yesikhathi somthombo. Iminithi engu-5 i AV1 -> JPG iphele ngeminithi engu-1 kungakhathaliseki ukuthi ifreyimu eminingi ukhetha, ngoba ibhodlela liyi JPG encoder libhala amafayela amancane ambalwa ngokufanayo, hhayi i AV1 demuxer.

Ingabe ngizokhipha amafreyimu ngesikhathi esifanele ngaphakathi kwe-AV1 video?

Yebo - isinqumo sesikhathi esiphakeme sivuma uhlu oluhlukaniswe nge-comma (isibonelo `00:01:23, 00:05:00, 00:10:42.5`) futhi sikhiqiza ihele elinye JPG ngesikhathi. Kusetshenziswa kumathumbnail esiga-nyezi, ama-shots endawo yokubhekisa, noma ukuthuthukisa ikhasi lokuxhumana lokubuyekeza.

Ingabe AV1 yami imfihlo ngesikhathi sokukhishwa kwefreyimu?

Yebo — imodeli yobumfihlo efanayo njengezo zonke iziguquli. Umsuka AV1 kanye ne-JPG ekhishwayo iqhutshwa kubasebenzi abahlukanisiwe futhi isuswa ngaphakathi kwemizuzu yokuqedwa.

AV1

I-AV1 iyifomethi yokuminyanisa ividiyo evulekile, engakhokhelwa eyenzelwe ukusakazwa kahle kwevidiyo nge-inthanethi. Inikeza ukusebenza kahle kokucindezela okuphezulu ngaphandle kokuyekethisa ikhwalithi yokubuka.

JPG

Amafayela we-JPG asebenzisa ukucindezeleka okulahlekile okuhlanganisiwe ngezithombe, kubonisa ubukhulu befayela elincane ngenkathi kugcinwa isilinganiso esibonakalayo.