MP4 → PNG

Guqula Eyakho MP4 kuya PNG amafayela kalula

Khetha amafayela akho

noma cindezela bese ususa amafayela akho lapha

I-Free Plan: 1 Ukushintsha/ihora · Iya ngaphandle komkhawulo →

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

Ukulayisha

Indlela yokuguqula MP4 kuya PNG

Isinyathelo 1: Layisha eyakho MP4 amafayela usebenzisa inkinobho engenhla noma ngokuhudula bese uphonsa.

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

Isinyathelo 3: Landa i-version yakho PNG amafayela

MP4 kuya PNG Imibuzo Evame Ukubuzwa Yokuguqulwa

Ngiyikhipha kanjani ifreyimu kusuka ku MP4 ividiyo njenge PNG izithombe?

Layisha phezulu i MP4 futhi umguquli ubonisa isikhethi sefremu-sokuzisusa: yonke ifremu ye-Nth, amafremu ezikhathini ezikhethekile, noma ifremu eyodwa ngesekondi. Ifremu ngayinye ekhethiwe ikhodwe njengehele PNG elilodwa futhi isethulo esigcwele siqoqwe kwi-ZIP archive yokulayisha. MP4 yi ISO/IEC 14496-14, ejwayelekile ngo-2001 futhi ivela ku-QuickTime box layout MOV isebenzisa. I-PNG yakhiwa ngo-1996 njengento eshintshayo engekho emthethweni ye-GIF, futhi yashintsha ibe yifomethi yesithombe esingasebenzisi iphutha ye-web.

Ingabe izihloko ezingezansi zizovela kuma-PNG amafreyimu engikhiphayo?

Akunakwenzeka uma beyi-subtitle track engokoqobo. MP4 igcina izihloko ezingezansi njenge-stream yabo futhi umdlali uzobasusa phezu kwesithombe ngesikhathi sokudlala, ngakho ifreyimu eqoshiwe umguquli ubhala ngaphandle njenge-PNG ine-pixels ehlanzekile ngaphansi. Izihloko ezingezansi eziboshwe kwividiyo ngaphambi kokuba ibe yi-MP4 ziyinkinga ehlukile — lapho ziyingxenye yesithombe futhi yonke ifreyimu ekhishwa igcina izithombe.

Ingabe i-PNG ixhasa ukubukhali?

Ifomethi ikhona, kodwa umsuka awuna-alpha ukuwunika - amafreyimu wevidiyo namakhasi ashicilelwe agcwele ukucasuka, ngakho wonke ama-pixel afika aqinile. Isixhumanisi se-alpha sisebenza ngemuva: kusho ukuthi ungasakaza isiqephu se PNG ngemuva ngaphandle kokushintsha ifomethi futhi. I-PNG iyisinqumo esifanele sezithombe-skrini, amalogo, umdwebi we-line kanye nanoma yini eneziphetho eziqinile noma ezicacile — akukho ukusakaza, akukho umbala obandayo.

Ingabe amafayela PNG azokhula kangako?

Okuningi kunalokho okubonayo, ngoba PNG igcina wonke ama-pixel ngokugcwele kungafani nokulinganisela. I-1080p ihlala ifinyelela ku-2-5 MB futhi i-4K ihlala ifinyelela ku-6-15 MB, ngakho-ke ukukhishwa okude kusebenza ngokushesha. Lokhu kuyibhizinisi elilungile uma izithombe zidla ukukhiqizwa okuqhubekayo, futhi okubi uma zihamba ngqo kwikhasi le-web. I-PNG isebenzisa ukucindezelwa kwe-DEFLATE phezu kwemigqa yokuskena ehlolwe, ngakho wonke ama-pixel ahlala ngokugcwele, kanye ne-8-bit alfa channel ephelele.

Ngabe usinqumo sinjani uma ifreyimu ngayinye ekhishwayo PNG iphuma?

Ukulungiswa okufanayo njenge MP4 ividiyo — 1080p MP4 ikhiqiza amafreyimu angama-1920×1080 PNG; 4K MP4 ikhiqiza amafreyimu angama-3840×2160 PNG. Sebenzisa ukuguqula usayizi ngemuva kokukhipha uma ufuna amathumbnail amancane noma ama-social-media-size crops.

Ingabe ngizokhipha ifreyimu ngayinye esuka ku MP4 njenge PNG?

Yebo, kodwa qaphela ngokubalwa kwefayela — i-30fps 1-minithi MP4 ikhiqiza amafreyimu angama-1,800 PNG. Siwafaka ngokuzenzakalela ku-ZIP. Ku-clip ezide, "1 ngesekondi" (ifreyimu engu-60) noma ama-timestamps athile anikeza imiphumela elawulwayo.

Ingabe izithombe ezikhishwayo PNG zizogcina umbala MP4 olinganiselwe?

Yebo — umbala uqokwa nge-matrix esetshenziswa umsuka MP4 (BT.709 ku-HD, BT.2020 ku-4K HDR). Umsuka we-HDR u-tone-map ku-SDR uma ukhishwa ku-PNG ngoba amafomethi amaningi PNG (PNG, JPG) angagcina ama-pixels we-HDR ahlukene ngokusemthethweni.

Yini ubukhulu behele lwesiphequluli esisodwa esikhishwayo PNG?

Kuxhomekeka kusinqumo kanye ne PNG codec. Ifreyimu ye-1080p PNG ivame ukuba 2 kuya ku-5 MB; i-1080p JPG esezingeni-85 ivame ukuba 200 kuya ku-500 KB; i-4K PNG ivame ukuba 6 kuya ku-15 MB. Kunzima kakhulu, ukukhishwa kwefreyimu ngayinye ye-PNG yemizuzu engu-10 1080p MP4 kukhiqiza ~50 GB jikelele.

Ingabe i-PNG ekhishwayo igcina i-EXIF camera metadata?

I MP4 iqoqo aligcinanga i-EXIF nge-frame ngayinye ngendlela ikhamera ehlala isebenza ngayo, ngakho i PNG amafayela aphuma nge-EXIF engenalutho. Sifaka `creation_time` indawo ekhombisa i-source frame timestamp ukuze uphinde uhlanganise i-bundle ngokulandelelana kokuthatha.

Ingabe ithatha isikhathi esingakanani ukukhishwa kwefremu kusuka ku MP4 kuya ku PNG?

Ukukhishwa kwefremu kushesha — 20 kuya ku-30% yomthombo wesikhathi sokuphila ku-standard pipeline. Iminithi engu-5 MP4 → PNG iqoqo liphelela ku-minithi eyodwa noma ngabe ifremu ibalwa, ngoba i-bottleneck yi PNG encoder, hhayi MP4 demuxer.

Ingabe ngizokhipha amafreyimu ezikhathini ezikhethekile ku MP4?

Yebo - ukhetho oluthuthukisiwe luthatha uhlu oluhlukaniswe nge-comma lwesikhathi (isibonelo `00:01:23,00:05:00,00:10:42`) futhi lukhiqiza ihele elinye PNG ngesikhathi. Kuhle kuma-thumbnails wesigaba, ama-scene reference shots, noma ukuthumbnailing izifundo ezide.

Ingabe i-MP4 yami yevidiyo ifihlakele ngesikhathi sokukhipha ifreyimu?

Yebo — imodeli yobumfihlo efanayo nezo zonke iziguqulo. Ividiyo yomthombo kanye nefreyimu ekhishwayo PNG iphathwa abasebenza ngokuzimela futhi isuswa ngaphakathi kwemizuzu; akukho ukuhlolwa komuntu, akukho ukuqeqeshwa kwe-corpus, akukho ukungena kweqembu lesithathu.

MP4

Ifomethi yesitsha se-MP4 ingagcina ividiyo, umsindo, imibhalo engezansi, nezithombe kufayela elilodwa ngokucindezela okuhle kakhulu.

PNG

Amafayela e-PNG asekela ukucaca futhi asebenzisa ukucindezela okungenakulahlekelwa, okwenza afaneleke kakhulu kuma-graphics, ama-logo, kanye nezithombe-skrini.