MKV → PNG

Guqula Eyakho MKV ukuba PNG iifayile ngokulula

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Indlela yokuguqula MKV ukuba PNG

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

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

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

MKV ukuba PNG Imibuzo Ebuzwa Rhoqo Ngokuguqula

Ndizikhupha njani iifayili kwi-MKV ividiyo njenge-PNG imifanekiso?

Layisha phezulu i MKV kwaye umguquli ubonisa umkhethi wesakhelo-sokukhupha: isakhelo ngasinye se-Nth, isakhelo kwixesha elikhankanyiweyo, okanye isakhelo ngasinye kwisiqingatha seyure. Isakhelo ngasinye esikhethiweyo sikhowudiwe njengefayili ye PNG kwaye iseti epheleleyo iquka uvimba we-ZIP oza kukhuphela. MKV yi Matroska, isiqulathi esivuliweyo esidweliswe ngowe-2002 ngaphandle kokungasebenzisi ilayisensi okanye uthintelo oluphezulu olunokunqumla. I-PNG yaphuhliswa ngowe-1996 njengento engekhoyo kwipateni ye-GIF, kwaye yayiyifomati yomfanekiso ongekhoyo kwi-web.

Ingaba izihloko zesihloko ziya kubonakala kwi-PNG iifayili endizikhupha?

Ayinjalo ukuba ziyindawo yomxholo ophambili. I MKV igcina umxholo ophambili njengothotho lwazo oluthile kwaye umdlali uzoba ngaphaya komfanekiso ngexesha lokudlala, ngoko isakhelo esikhowudiweyo umguquli ubhala ngaphandle njenge PNG inee-pixels ezicocekileyo ezantsi. Isihloko esiphantsi esikhutshwe kwividiyo phambi kokuba ibe yi MKV siyingxaki eyahlukileyo - ngoko ziyinxalenye yomfanekiso kwaye yonke isakhelo esikhutshwe sizigcina.

Ndingayitsala enye PNG kwisiqendu ngasinye se MKV?

Ayiba iqhosha elinye, kodwa i MKV iyenza ibonakale ngokucacileyo: amaphawu esiqendu agcinwa kwisiqulathi seefayili njengeziqinisekiso zexesha ezibizwa ngokuba ziixesha, ngoko funda uluhlu lwesiqendu ngaphandle kwefayile kwaye ucofe ezo xesha kwindawo yesiqendu sexesha. Ufumana enye PNG kwisiqendu ngasinye, ngokulandelana, eyiyo indlela eqhelekileyo yokwakha imifanekiso eqingqiweyo yoshicilelo olude. Amacebo angenamagama esiqendu ashiya ukukhetha imiboniso ngemehlo endaweni. I-MKV yindawo yokugcina ekhethiweyo kuba igcina iingoma zesandi ezingaphelelanga, izihloko eziphantsi ezicocekileyo, abaphawuli besiqendu kunye nobugcisa bokuqhobosha kwifayili enye.

Ingaba i-PNG ixhasa ukubonakaliswa ngokucacileyo?

Ifomati isebenza, kodwa umbhali akafuni i-alpha ukunika - ii-frames zevidiyo kunye neephepha ezibonisiweyo zicacile ngokupheleleyo, ngoko ke zonke ii-pixels zifika ziqinile. Isiqhagamshelanisi se-alpha sihlala sisetyenziswa emva koko: kuthetha ukuba ungacima into ephuma kwi-PNG kamva ngaphandle kokuguqula i-format kwakhona. I-PNG yinketho efanelekileyo yokuthatha imifanekiso yekhusi, ilogos, umzobo womgca nantoni na enemiphetho eqinileyo okanye ebonisa ngaphaya — akukho cingo, akukho mbala obandayo.

Ingaba iifayili PNG ziya kuba zikhulu kangakanani?

Ikhulu kunalo lonke ulindeleyo, kuba PNG igcina i-pixel nganye ngokuchanekileyo kunokuba ilinganise. I-1080p ihlala iwela ngaphantsi kwe-2-5 MB kwaye i-4K ihlala ngaphantsi kwe-6-15 MB, ngoko ke ukuphuma okude kudibanisa ngokukhawuleza. Oku kurhwebo oluchanekileyo xa imifanekiso i feed iqhubekeka, kwaye okubi xa zihamba ngqo kwiphepha le-web. I-PNG isebenzisa uxinzelelo lwe-DEFLATE ngaphezulu kwamagqabantshintshi okuskena acociweyo, ngoko ke i-pixel nganye ihlala ngokuchanekileyo, kunye ne-8-bit epheleleyo ye-alpha channel.

Kunye nobunzulu obunjani isakhelo ngasinye esikhutshwe PNG siphuma?

Ugqibo olufanayo njenge MKV ividiyo — i-1080p MKV ivelisa i-1920×1080 PNG iifayili; i-4K MKV ivelisa i-3840×2160 PNG iifayili. Sebenzisa uncedo lokuphinda ubungakanani emva kokukhupha ukuba ufuna iithumbnails ezincinci okanye ubungakanani bokusika i-social-media.

Ndingayikhupha isakhelo ngasinye esitsha kwi MKV njenge PNG?

Ewe, kodwa uqaphele ngobalo lwefayili - i-30fps 1-imizuzu MKV ivelisa i-1,800 PNG iifayili. Sizifaka kwi-ZIP ngokuzenzekelayo. Kwiiclip ezide, ukhetho "1 ngomzuzwana" (iifayili ezi-60) okanye i-timestamps ekhethekileyo inika isiphumo esilawulwayo.

Ingaba imifanekiso ekhutshweyo PNG iya kugcina umbala ophakamileyo MKV?

Ewe — umbala uguqulwa umbala nge-matrix esetyenziswa ngumboneleli MKV (BT.709 ye-HD, BT.2020 ye-4K HDR). Umboneleli we-HDR udweliswe nge-tone-map kwi-SDR xa ukhupha kwi-PNG kuba i-PNG ifomati (PNG, JPG) ayikwazi ukugcina i-HDR pixel ranges ngokusemthethweni.

Yintoni ubungakanani befayili yesakhelo esitshatweyo PNG?

Ixhomekeke kwisisombululo kunye ne PNG codec. I-1080p PNG frame ihlala i-2 ukuya kwi-5 MB; i-1080p JPG kwi-quality-85 i-200 ukuya kwi-500 KB; i-4K PNG i-6 ukuya kwi-15 MB. Kwimeko ebuhlungu, i-PNG frame nganye yokukhupha i-10-minute 1080p MKV ivelisa ~50 GB ngokupheleleyo.

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

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

Ithatha ixesha elingakanani ukususwa kwesakhelo ukusuka kwi MKV ukuya kwi PNG?

Ukukhupha iframe kukhawuleza - ngokuqhelekileyo 20 ukuya 30% yobude bomthombo kwindlela eqhelekileyo yokuhambisa. Imizuzu emihlanu MKV → PNG iqela ligqiba malunga nemizuzu enye ngaphandle kokucinga ngobalo lweeframe, kuba ibhotile yengxowa yi PNG encoder, hayi i MKV demuxer.

Ndingazikhupha iifayili kwixesha elikhankanyiweyo le MKV?

Ewe - ukhetho oluphambili luyakwamkela uluhlu oluhlukaniswe nge-comma lweziqinisekiso zexesha (umzekelo `00:01:23,00:05:00,00:10:42`) kwaye luvelise ifayile enye PNG ngesatifiketi sexesha. Esetyenziswa kwizifundo ezincinci zesifundo, iziganeko ezibhekisa kwimifanekiso, okanye izifundo ezide ezibonisa imifanekiso.