MP4 → BMP

Guqula Eyakho MP4 kuya BMP amafayela kalula

Khetha amafayela akho

noma cindezela bese ususa amafayela akho lapha

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

Tshintsha amafayela mahhala, Pro abasebenzisi bangaguqula amafayela amakhulu kakhulu; Bhala manje

Ukulayisha

Indlela yokuguqula MP4 kuya BMP

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 BMP amafayela

MP4 kuya BMP Imibuzo Evame Ukubuzwa Yokuguqulwa

Ngiyikhipha kanjani ifreyimu kusuka ku MP4 ividiyo njenge BMP 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 BMP 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-BMP yiWindows Bitmap, ifomethi ye-raster engaqondakali efakwe ku-Windows kusukela ngo-1985.

Ingabe izihloko ezingezansi zizovela kuma-BMP amafreyimu engikhiphayo?

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

Ingabe amafayela BMP azokhula kangako?

Okuningi kunalokho okubonayo, ngoba BMP 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-BMP igcina imiqulu ye-pixel engacindezelwanga ngokuphelele ngesihloko esincane, ngakho-ke kulula ukuyihlukanisa.

Ngabe usinqumo sinjani uma ifreyimu ngayinye ekhishwayo BMP iphuma?

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

Ingabe ngizokhipha ifreyimu ngayinye esuka ku MP4 njenge BMP?

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

Ingabe izithombe ezikhishwayo BMP 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-BMP ngoba amafomethi amaningi BMP (PNG, JPG) angagcina ama-pixels we-HDR ahlukene ngokusemthethweni.

Yini ubukhulu behele lwesiphequluli esisodwa esikhishwayo BMP?

Kuxhomekeka kusinqumo kanye ne BMP 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-BMP ekhishwayo igcina i-EXIF camera metadata?

I MP4 iqoqo aligcinanga i-EXIF nge-frame ngayinye ngendlela ikhamera ehlala isebenza ngayo, ngakho i BMP 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 BMP?

Ukukhishwa kwefremu kushesha — 20 kuya ku-30% yomthombo wesikhathi sokuphila ku-standard pipeline. Iminithi engu-5 MP4 → BMP iqoqo liphelela ku-minithi eyodwa noma ngabe ifremu ibalwa, ngoba i-bottleneck yi BMP 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 BMP 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 BMP iphathwa abasebenza ngokuzimela futhi isuswa ngaphakathi kwemizuzu; akukho ukuhlolwa komuntu, akukho ukuqeqeshwa kwe-corpus, akukho ukungena kweqembu lesithathu.

Kungani amafreyimu ami akhishwayo BMP amnyama?

Kuyinto evamile kakhulu ukuthi ukunyakaza kokumnyama kubhakwe ku MP4 - ikhamera noma okudingayo kwahamba lapho ifreyimu ithathwa. Khetha ama-timestamps kusuka emibonweni ehlala njalo, noma khipha amafreyimu azungeze futhi ukhethe okuqinile. Ipayipi alikwazi ukuhlela imininingwane engakhona.