M4V → BMP

Guqula Eyakho M4V 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 M4V ukuba BMP

Inyathelo 1: Layisha eyakho M4V 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

M4V ukuba BMP Imibuzo Ebuzwa Rhoqo Ngokuguqula

Ndizikhuphele njani iifayili nganye kwi M4V njenge BMP imifanekiso?

Layisha phezulu ifayili M4V 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-M4V video stream, i-encoded njengefayili ehlukileyo ye BMP, kwaye i-bundled njenge-ZIP yokukhuphela ezantsi. M4V yi-Apple's MP4, esetyenziswa yi-iTunes ne-Apple TV app yefilimu kunye ne-TV. I-BMP yi-Windows Bitmap, ifomati ye-raster egqityiweyo eyenziwe kwi-Windows ukusukela ngo-1985.

Ingaba izihloko ezingaphantsi ziya kubonakala kwi BMP iifayili endizikhuphayo?

Ayinjalo ukuba ziyindawo ebonakalayo yokulandela umbhalo osezantsi ephepheni. I M4V igcina umbhalo osezantsi ephepheni njengendlela yabo yokuhamba kwaye umdlali uzoba phezu komfanekiso ngexesha lokudlala, ngoko ke isakhelo esikhowudiweyo umguquli ubhala ngaphandle njenge BMP inee-pixels ezicocekileyo ezantsi. Isihloko esingaphantsi esikhutshwe kwividiyo phambi kokuba ibe yi M4V siyinto eyahlukileyo - ngoko ziyinxalenye yomfanekiso kwaye yonke isakhelo esikhutshwe sigcina ezi.

Ndingayitsala enye BMP ngaphandle kwesihloko ngasinye se M4V?

Ayiba iqhosha elinye, kodwa i M4V iyenza ibonakale icacile: iimpawu zesiqendu zigcinwa kwisiqulathi seefayili njengeziphawuli zexesha ezibizwa ngokuba zii-timestamps, ngoko funda uluhlu lwesiqendu ngaphandle kwefayile kwaye ucofe ezixesha kwindawo ye-timestamp. Ufumana enye BMP kwisiqendu ngasinye, ngokulandelana, eyiyo indlela eqhelekileyo yokwakha imifanekiso eqingqiweyo yoshicilelo olude. Amacebo angenamanqaku esiqendu ashiya ukukhetha imiboniso ngemehlo endaweni. I-M4V igcina abaphawuli besiqendu, umsebenzi wobugcisa kunye nengoma yesihloko esingaphantsi kwisimo i-Apple TV app ilindeleyo, eyona MP4 iqhelekileyo ihlala ilahlekelwa yiyo.

Ingaba iifayili BMP ziya kuba zikhulu kangakanani?

Ikhulu kunalo lonke ulindeleyo, kuba BMP 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-BMP igcina imiqolo ye-pixel engacinezelwanga ngokupheleleyo enesihloko esincinci, oko kukuthi, yintoni eyenza kube lula ukuchaza ngeenkcukacha.

Yiyiphi i-resoluton ephuma kuyo imifanekiso ekhutshwe BMP?

Ugqibo olufanayo njengomthombo M4V: i-1080p M4V ivelisa i-1920x1080 BMP ii-frames, i-4K M4V 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 M4V njenge BMP?

Ewe, kodwa uqaphele inani lefayili - i-30 fps 1-minute M4V 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 M4V kwi-frame nganye iza kwenza ~100,000 BMP imifanekiso.

Ingaba i-BMP igcina umbala ophakamileyo we-M4V?

Ewe - umbala uguqulwa kwikhowudi nge-matrix efanayo ebonisa umthombo M4V (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 M4V imalunga ne-50 GB kwaye ihlukaniswe phakathi kwe-ZIPs ezininzi.

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

I M4V 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 M4V ukuya ku BMP?

Isakhelo sokukhupha ikhowudi sikhawulezayo - ngokuqhelekileyo 20- 30% yobude bomthombo. Imini emihlanu M4V -> 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 M4V demuxer.

Ndingazikhuphela iifayili kwixesha elichanekileyo elingaphakathi kwi-M4V 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 M4V yam ifihlakeleyo xa ikhutshwa isakhelo?

Ewe - imodeli yobumfihlo efanayo njengengguqulo nganye. Umsuka M4V kunye ne BMP ekhutshweyo iqhutywa kubasebenzi ababekwe ngokukodwa kwaye icinywe kwimizuzu yokuphela.