AVI → JPG

Guqula Eyakho AVI kuya JPG amafayela kalula

Khetha amafayela akho

noma cindezela bese ususa amafayela akho lapha

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

Ukulayisha

Indlela yokuguqula AVI kuya JPG

Isinyathelo 1: Layisha eyakho AVI 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

AVI kuya JPG Imibuzo Evame Ukubuzwa Yokuguqulwa

Ngiyikhipha kanjani ifreyimu ngayinye kusuka ku AVI njenge JPG izithombe?

Layisha phezulu ihele AVI futhi umguquli ubonisa isikhethi sefreyimu-sokukhipha: nganoma iyiphi ifreyimu ye-Nth, amafreyimu ezikhathini ezicacisiwe, noma ifreyimu eyodwa ngesekondi. Ifreyimu ngayinye ekhethiwe ikhishwa ku-AVI umsinga wevidiyo, ibhalwe njengehele JPG elilodwa, futhi iqoqwe njenge-ZIP yokulayisha ngezansi. AVI Microsoft Audio Video Interleave, isungulwe ngo-1992 phezu RIFF chunk format - eyodwa yezinto eziphilayo ezidala kakhulu okwamanje e circulation. I-JPG iyisimo se-JPEG esijwayelekile kusukela ngo-1992, futhi ngemuva kweminyaka emithathu ihlala iyisimo esisetshenziswa amakhamera amaningi namanye amawebhusayithi asebenzisa ama-photos.

Kungani amafreyimu ami akhishwayo anemigqa ejikelezayo edlula kuwo?

Ngenxa yokuthi umsuka uxhunywe. AVI okuqukethwe kusuka ku-broadcast ne-DVD era igcina ama-fields amabili aphakathi nendawo aphezulu ngefremu ngayinye, athathwe ngengxenye engu-50 yesithupha, futhi i-still ekhishwa ngokuqondile ibonisa ukuthi zombili zixhunywe ndawonye njenge-combing nganoma yini ehambayo. Vumela u-deinterlacing ngaphambi kokukhipha futhi i-still ngayinye ikhiwa kusuka ku-frame eqhubekayo evuselelwe.

Ingabe ngithola ama-JPG amafreyimu ngaphandle kwesihloko esingezansi?

Uma nje i AVI ayizange itshetshezwe, ngoba AVI ayinaso isingeniso esikhethiwe sohluzo esikhethiwe sokuvala. Noma yini eAVI ebonisa esigabeni isithombe, ngakho i JPG ngayinye ikhiqiza ukukhishwa futhi akukho sinqumo esisusayo ngemuva. lapho ihele elihlukile lesihloko likhona eduze kwevidiyo, khipha kusuka emthonjeni ogcina ama-2 ahlukene futhi ama-frames aphuma ahlanzekile. I-AVI ayinaso isixhaso esisemthethweni se-codecs yamanje, isilinganiso sefreyimu esiguqukayo, izihloko ezithambile noma amafayela angaphezu kuka-4 GB ngaphandle kokuhlaselwa, futhi i-chunk ngayinye i-overhead ibhoboza ifayela.

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.

Ingabe ihele elikhulu kakhulu AVI lizokhuphula ngokuphumelelayo?

Ama-akhawunti amahhala afinyelela ku-100 MB ngefayela ngalinye, futhi AVI ama-akhowudi asebenza kabanzi ngoba ifomu lifaka i-chunk ngayinye engaphezulu kwedatha yevidiyo. I-Premium iphakamisa i-cap ngokuqinile. Uma ihele lihlukaniswe ngama-parts amanani ngenxa ye-format ceiling, thumela ngazo zonke futhi zithathwe njengemisebenzi eyodwa.

Ngasiphi isixazululo izithombe ezikhishwayo JPG ziphuma khona?

Isinqumo esifanayo njengesisuka ku AVI: 1080p AVI ikhiqiza amafreyimu angama-1920x1080 JPG, 4K AVI 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 AVI njenge JPG?

Yebo, kodwa qaphela inani lefayela - i-30 fps 1-minithi AVI 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-AVI nganoma iyiphi ifreyimu lizokhiqiza izithombe ezingu-~100,000 JPG.

Ingabe ama-JPG amafreyimu azogcina umbala AVI wokuhlanganiswa?

Yebo — umbala uqokwa nge-matrix efanayo etholakalayo AVI 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 AVI kulinganiselwa ku-50 GB futhi kuhlukaniswe ngezi-ZIPs eziningi.

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

I AVI 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 AVI kuya ku JPG?

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

Ingabe ngizokhipha amafreyimu ngesikhathi esifanele ngaphakathi kwe-AVI 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.

AVI

Amafayela e-AVI angaqukatha idatha yomsindo nevidiyo, esekelwa kabanzi kodwa enosayizi abakhulu bamafayela.

JPG

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