MP4 → BMP

Guqula Eyakho MP4 ukuba BMP iifayile ngokulula

Khetha iifayile zakho

okanye rhuqa uze ushiye iifayile zakho apha

Inkqubo ekhululekileyo: 1 IiNguqulelo/iyure · Yiya ngaphandle komda →

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

Iyalayisha

Indlela yokuguqula MP4 ukuba BMP

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 BMP iifayile

MP4 ukuba BMP Imibuzo Ebuzwa Rhoqo Ngokuguqula

Ndizikhuphele njani iifayili nganye kwi MP4 njenge BMP imifanekiso?

Layisha phezulu ifayili MP4 kwaye umguquli ubonisa umkhethi we-frame-extraction: i-frame nganye ye-Nth, i-frames kwi-timestamps ekhankanyiweyo, okanye i-frame enye ngesekondi. I-frame nganye ekhethiweyo i-decoded ukusuka kwi-MP4 video stream, i-encoded njengefayili ehlukileyo ye BMP, kwaye i-bundled njenge-ZIP yokukhuphela ezantsi.

Yiyiphi i-resoluton ephuma kuyo imifanekiso ekhutshwe BMP?

Ugqibo olufanayo njengomthombo MP4: i-1080p MP4 ivelisa i-1920x1080 BMP ii-frames, i-4K MP4 ivelisa i-3840x2160 BMP ii-frames. Umguquli awukhuphi ubungakanani okanye awukhuphi i-sample — ubungakanani be-pixel butsalwa ngqo kwi-frame eyenziwe ukuba isebenze. Sebenzisa /resize-image/ emva kokukhupha ukuba ufuna ii-thumbnails ezincinci.

Ndingayikhupha isakhelo ngasinye se MP4 njenge BMP?

Ewe, kodwa uqaphele inani lefayili - i-30 fps 1-minute MP4 ivelisa i-1,800 BMP iifayili. Sizifaka kwi-ZIP archive epheleleyo ngokuzenzekelayo. Kwiiclip ezide, khetha "1 ngesekondi" emiselweyo (i-60 iifayili ngesekondi) okanye ukhethe iziqinisekiso zexesha ezikhethekileyo. Iyure ye MP4 kwi-frame nganye iza kwenza ~100,000 BMP imifanekiso.

Ingaba i-BMP igcina umbala ophakamileyo we-MP4?

Ewe - umbala uguqulwa kwikhowudi nge-matrix efanayo ebonisa umthombo MP4 (BT.709 ye-HD, BT.2020 ye-4K HDR). Amacebo e-HDR afana ne-tone-mapped kwi-SDR xa ekhutshwa kwi-BMP engagcinanga amanqanaba e-HDR pixels ngokusemthethweni (JPG, PNG-8). I-high-bit PNG-16 okanye TIFF i target ukuba ufuna ukugcina uluhlu olubanzi olunamandla.

Ingaba i-BMP isakhelo esikhuphiweyo sikhulu kangakanani na kwi-disk?

Kuxhomekeke kwisisombululo kunye nokhetho lwe-BMP codec: i-1080p PNG frame yi-2-5 MB engenakulahleka, i-1080p JPG kwi-quality 85 yi-200-500 KB. Yahlula nge-frame count ukuze ubungakanani be-ZIP — kwinqanaba eliphezulu, i-PNG ephuma kwi-frame nganye ye-10-minute 1080p MP4 imalunga ne-50 GB kwaye ihlukaniswe phakathi kwe-ZIPs ezininzi.

Ingaba i-BMP ekhutshweyo igcina i-EXIF metadata yekhamera?

I MP4 ibhokisi ayithabathanga i-EXIF yesakhelo ngasinye ngendlela ikhamera ehlala isenza ngayo, ngoko ke i BMP iifayili ziphuma zingenazinto eziqhotyoshelweyo ze-EXIF. Umguquli ufaka `creation_time` indawo ebonisa kwi-source frame timestamp, ukuze uphinde ulungelelanise i-bundle ngokulandelana kwexesha okanye uqhagamshelane nesihloko esingaphantsi / nabaphawuli besahluko.

Ithatha ixesha elingakanani ukususwa kwesakhelo ukusuka ku MP4 ukuya ku BMP?

Isakhelo sokukhupha ikhowudi sikhawulezayo - ngokuqhelekileyo 20- 30% yobude bomthombo. Imini emihlanu MP4 -> BMP iqela ligqiba malunga nemizuzu emi- 1 ngaphandle kokuba iframes ezininzi ukhetha, kuba ibhotile yengxowa ye BMP encoder ibhala iifayile ezininzi ezincinci ngokuthe tye, hayi i MP4 demuxer.

Ndingazikhuphela iifayili kwixesha elichanekileyo elingaphakathi kwi-MP4 yevidiyo?

Ewe - ukhetho oluphambili lwesiqinisekiso sexesha livuma uluhlu oluhlukaniswe nge-comma (umzekelo `00:01:23, 00:05:00, 00:10:42.5`) kwaye luvelisa ifayile enye BMP ngesiqinisekiso sexesha. Isetyenziswa kwiziqendu ezincinci, iziganeko ezibhekisa kwimifanekiso, okanye ukwakha iphepha loqhagamshelwano lokujonga kwakhona.

Ingaba i MP4 yam ifihlakeleyo xa ikhutshwa isakhelo?

Ewe - imodeli yobumfihlo efanayo njengengguqulo nganye. Umsuka MP4 kunye ne BMP ekhutshweyo iqhutywa kubasebenzi ababekwe ngokukodwa kwaye icinywe kwimizuzu yokuphela.

Kutheni i-BMP isakhelo sam esikhutshweyo simnyama?

I-motion blur ihlala i-baked kwi-source MP4 (ikhamera okanye into ejikelezayo yayingumsebenzi xa isakhelo sathathwa). Zama ukukhetha i-timestamps ukusuka kwimiboniso ehlala ikhona, okanye uthathe ii-frames ezininzi ezidibeneyo uze ukhethe ezicacileyo. I-pipeline ayiqwalaseli inkcukacha ezingakhoyo kwi-original MP4.

Ingaba umguquli ukhetha isakhelo esinye ngasinye sotshintsho lwendawo ebonakalayo kwi MP4?

Akukho kutyibiliko olusisiseko - sebenzisa "1 ngomzuzwana" omiselweyo njengentsingiselo ecacileyo kwaye ujonge ngokubonakalayo i-bundle yezinto eziguqukayo zendawo. I-scene-detect extractor ekhethekileyo (isebenza nge-ffmpeg select=gt(indawo)) ikwi-roadmap kwaye izakuwela kwi-BMP yorhwebo lwangaphandle kamva kule nyanga.

Ndingasebenzisa i-BMP isakhelo esikhutshweyo ngokurhweba?

Ewe, ngokuxhomekeke kwilayisensi elawula umthombo MP4 umxholo. Ukuguqulwa kukutshintsha kwefomati - ilungelo lokushicilela kwizinto eziquletheyo lihlala nomnini wayo kwi MP4. Sidibanisa akukho phawu lwamanzi, akukho phawu olufakelweyo, kwaye sicela akukho layisensi ngaphezulu kwe BMP iqela.