MP4 → TIFF

Guqula Eyakho MP4 ukuba TIFF iifayile ngokulula

Khetha iifayile zakho

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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 TIFF

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 TIFF iifayile

MP4 ukuba TIFF Imibuzo Ebuzwa Rhoqo Ngokuguqula

Ndizikhuphele njani iifayili nganye kwi MP4 njenge TIFF 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 TIFF, kwaye i-bundled njenge-ZIP yokukhuphela ezantsi. I-MP4 yi-ISO/IEC 14496-14, imiselwe ngo-2001 kwaye ivela kwibhokisi yobeko lwe-QuickTime efanayo ne-MOV esetyenziswa. I-TIFF yifomati yefayili yomfanekiso ophawulwe ukusukela ngo-1986, kwaye yifomati yokukhangela, yoshicilelo kunye nokugcina iinjineli ezimiselwe.

Ingaba izihloko ezingaphantsi ziya kubonakala kwi TIFF iifayili endizikhuphayo?

Ayinjalo ukuba ziyindawo ebonakalayo yokulandela umbhalo osezantsi ephepheni. I MP4 igcina umbhalo osezantsi ephepheni njengendlela yabo yokuhamba kwaye umdlali uzoba phezu komfanekiso ngexesha lokudlala, ngoko ke isakhelo esikhowudiweyo umguquli ubhala ngaphandle njenge TIFF inee-pixels ezicocekileyo ezantsi. Isihloko esingaphantsi esikhutshwe kwividiyo phambi kokuba ibe yi MP4 siyinto eyahlukileyo - ngoko ziyinxalenye yomfanekiso kwaye yonke isakhelo esikhutshwe sigcina ezi.

Ingaba i-TIFF 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-TIFF kamva ngaphandle kokuguqula i-format kwakhona. I-TIFF iphatha i CMYK, ubunzulu be-16-bit, i-ICC efakwe ngaphakathi kunye namaxwebhu ephepha elininzi, eli linyaniso le shicilelo kunye nomsebenzi wokuhamba kovimba ofunayo.

Ingaba iifayili TIFF ziya kuba zikhulu kangakanani?

Ikhulu kunalo lonke ulindeleyo, kuba TIFF 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-TIFF yindawo yokugcina engaphezulu kwe-codec: inokuphatha i-data engacinezelwanga, i-LZW, i-ZIP okanye nakwi-JPEG, ukuya kuthi ga kwi-32 bits kwisiqhagamshelanisi ngasinye, ngeephepha ezininzi kwifayile enye.

Yiyiphi i-resoluton ephuma kuyo imifanekiso ekhutshwe TIFF?

Ugqibo olufanayo njengomthombo MP4: i-1080p MP4 ivelisa i-1920x1080 TIFF ii-frames, i-4K MP4 ivelisa i-3840x2160 TIFF 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 TIFF?

Ewe, kodwa uqaphele inani lefayili - i-30 fps 1-minute MP4 ivelisa i-1,800 TIFF 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 TIFF imifanekiso.

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

Kuxhomekeke kwisisombululo kunye nokhetho lwe-TIFF 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-TIFF ekhutshweyo igcina i-EXIF metadata yekhamera?

I MP4 ibhokisi ayithabathanga i-EXIF yesakhelo ngasinye ngendlela ikhamera ehlala isenza ngayo, ngoko ke i TIFF 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 TIFF?

Isakhelo sokukhupha ikhowudi sikhawulezayo - ngokuqhelekileyo 20- 30% yobude bomthombo. Imini emihlanu MP4 -> TIFF iqela ligqiba malunga nemizuzu emi- 1 ngaphandle kokuba iframes ezininzi ukhetha, kuba ibhotile yengxowa ye TIFF 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 TIFF 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 TIFF ekhutshweyo iqhutywa kubasebenzi ababekwe ngokukodwa kwaye icinywe kwimizuzu yokuphela.