Guqula MP4 ukuba JPG

Guqula Eyakho MP4 ukuba JPG amaxwebhu ngokulula

Khetha iifayile zakho

*Iifayile zicinyiwe emva kweeyure ezingama-24

Guqula iifayile ezifikelela kwi-1 GB simahla, abasebenzisi bePro banokuguqula iifayile ezifikelela kwi-100 GB; Bhalisa ngoku

Iyalayisha

Indlela yokuguqula MP4 ukuba JPG

Inyathelo 1: Layisha eyakho MP4 iifayile usebenzisa iqhosha elingasentla okanye ngokutsala nokuwisa.

Inyathelo lesi-2: Cofa iqhosha elithi 'Guqula' ukuze uqalise ukuguqula.

Inyathelo lesi-3: Khuphela i-converted yakho JPG iifayile

MP4 ukuba JPG Imibuzo Ebuzwa Rhoqo Ngokuguqula

Ndizikhupha njani iifayili kwi-MP4 ividiyo njenge-JPG imifanekiso?

Layisha phezulu ifayili MP4 kwaye umguquli ubonisa umkhethi wesakhelo-sokukhupha: isakhelo ngasinye se-Nth, ii-frames kwi-timestamp ekhankanyiweyo, okanye i-frame enye ngesekondi. Isakhelo ngasinye esikhethiweyo sikhowudiwe njengefayili ehlukileyo JPG kwaye sidityaniswe njenge-ZIP yokukhuphela ezantsi. I-JPG yi-JPEG eqhelekileyo ukusukela ngo-1992, kwaye emva kweminyaka emithathu ihlala i-format esetyenziswa ziikhamera ezininzi kunye ne-web sites ezininzi zomfanekiso.

Umfanekiso okhuphiweyo JPG uyaphuma njani kwisisombululo esipheleleyo?

Ugqibo olufanayo njenge MP4 ividiyo — umthombo we-1080p uvelisa i-1920×1080 JPG iifayili; umthombo we-4K uvelisa i-3840×2160 JPG iifayili. Yenza ubungakanani kwakhona emva kokukhupha ukuba ufuna imifanekiso encinci ekhawulezayo.

Ndingayikhupha isakhelo ngasinye kwifayili MP4 njenge JPG?

Ewe, kodwa uqaphele ngobalo lweefayili - i-30fps yevidiyo yemizuzu emi-1 ivelisa i-1,800 yeefayili. Sizifaka kwi-ZIP yovimba ngokuzenzekelayo. Kwimiqolo emide sebenzisa ukhetho "1 ngomzuzwana" (i-60 iifayili) okanye i-timestamps ekhethekileyo.

Ingaba imifanekiso JPG iya kugcina umbala MP4 ophakamileyo?

Ewe - umbala uguqulwa kolunye ulwimi ngematriki efanayo esetyenziswa ngumboneleli MP4 (BT.709 ye-HD, BT.2020 ye-4K HDR). Umboneleli we-HDR udweliswe ngetoni ye-map kwi-SDR xa ukhupha kwi-JPG (i-PNG / JPG ayikwazi ukugcina umthamo we-pixels ye-HDR ngokusemthethweni).

Yintoni ubungakanani befayili yesakhelo esitshatweyo JPG?

Ixhomekeke kwisisombululo kunye nokhetho lwe-codec. I-1080p PNG frame yi-2-5 MB; i-1080p JPG quality-85 frame yi-200-500 KB. Yiphindaphindwe nge-frame count ukuze ubungakanani be-ZIP — kwi-extreme, i-frame nganye yokukhupha i-10-min 1080p video kwi-PNG yi ~50 GB.

Ingaba i-JPG ekhutshiweyo igcina i-EXIF metadata yekhamera?

Isiqulathi seefayili MP4 asigcinanga i-EXIF yesakhelo ngasinye ngendlela ikhamera ehlala isenza ngayo, ngoko ke ii-JPG iifayili ziphuma nge-EXIF engenanto. Sifaka `creation_time` indawo ebonisa i-source frame timestamp ukuze uphinde ulungelelanise i-bundle.

Ithatha ixesha elingakanani ukususwa kwesakhelo ukusuka kwi MP4 ukuya kwi JPG?

Ukukhupha isakhelo kukhawuleza - ngokuqhelekileyo 20- 30% yobude bomthombo kwindlela eqhelekileyo yokuhambisa. Imizuzu emihlanu MP4 → JPG iqela ligqiba malunga nemizuzu emi- 1 ngaphandle kokucinga ngobalo lwesakhelo, kuba ibhotile yengcambu yi JPG encoder, hayi i demuxer.

Ndingazikhupha njani iifayili kwixesha elikhankanyiweyo kwividiyo MP4?

Ewe - ukhetho oluphambili luyakwamkela uluhlu oluhlukaniswe nge-comma lweziqinisekiso zexesha (umzekelo `00:01:23,00:05:00,00:10:42`) kwaye luvelise i JPG ifayili nganye ngexesha elifanayo. Isetyenziswa kwizifundo ezincinci okanye iziganeko ezibhekisa kwimifanekiso.

Ingaba i-MP4 yevidiyo yam ifihlakeleyo ngexesha lokukhupha isakhelo?

Ewe - imodeli yobumfihlo efanayo neyokuguqula yonke. Umthombo wevidiyo kunye neeframes ezikhuphiweyo ziqhubekeka kubasebenzi ababekwe ngokukodwa kwaye zicinywe kwimizuzu.

Kutheni iifayili zam ezikhuphiweyo JPG zimnyama?

I-motion blur ihlala ivela kumboneleli MP4 (ikhamera yayihamba xa isakhelo sathathwa). Zama ukukhetha i-timestamp evela kwimiboniso eqinileyo, okanye uthathe ii-frames ezininzi ezidibeneyo uze ukhethe ezicacileyo. I-pipeline ayiqwalaseli ukubonakala.

Ingaba le sixhobo sixhasa ukutsala isakhelo esinye ngasinye kutshintsho lwendawo yomboniso?

Ayikho kutyibiliko olusisiseko - sebenzisa "1 ngomzuzwana" ukhetho njengolufutshane, emva koko ukhethe ngokubonakalayo iifayili zotshintsho lwendawo. Ukhuphelo olukhethekileyo lokufumana indawo lukwi-roadmap.

Ndingasebenzisa i-JPG isakhelo esikhutshweyo ngokurhweba?

Ewe, ixhomekeke kwilayisensi elawula umthombo MP4 imixholo. Utshintsho lwefomati aluyi kuzisa nantoni na — siza kudibanisa akukho mqondiso wamanzi kwaye siza kuzisa nantoni na kwilayisensi kwi JPG imveliso.