3GP → PNG

Guqula Eyakho 3GP ukuba PNG iifayile ngokulula

Khetha iifayile zakho

okanye rhuqa uze ushiye iifayile zakho apha

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Indlela yokuguqula 3GP ukuba PNG

Inyathelo 1: Layisha eyakho 3GP iifayile usebenzisa iqhosha elingasentla okanye ngokutsala nokuwisa.

Inyathelo lesi-2: Cofa iqhosha elithi 'Guqula' ukuze uqalise ukuguqula.

Inyathelo lesi-3: Khuphela i-converted yakho PNG iifayile

3GP ukuba PNG Imibuzo Ebuzwa Rhoqo Ngokuguqula

Ndizikhupha njani iifayili kwi-3GP ividiyo njenge-PNG imifanekiso?

Layisha phezulu i 3GP kwaye umguquli ubonisa umkhethi wesakhelo-sokukhupha: isakhelo ngasinye se-Nth, isakhelo kwixesha elikhankanyiweyo, okanye isakhelo ngasinye kwisiqingatha seyure. Isakhelo ngasinye esikhethiweyo sikhowudiwe njengefayili ye PNG kwaye iseti epheleleyo iquka uvimba we-ZIP oza kukhuphela. I-3GP yindawo yokugcina i-3GPP emiselweyo yefowuni eziqalayo, xa ividiyo ifuna ukufakela i-176x144 yekhusi kunye ne-2G yenkqubo yedatha. I-PNG yaphuhliswa ngowe-1996 njengento engekhoyo kwipateni ye-GIF, kwaye yayiyifomati yomfanekiso ongekhoyo kwi-web.

Ndingazifumana njani ii-PNG iifayili ngaphandle kweencwadi ezineenkcukacha?

Ukuba i 3GP ayizange ibhakwe, kuba 3GP ayinayo i-subtitle ekhethiweyo yokuqhuba ukuvala. Nantoni na ebonisa i 3GP kwisikrini sikwimifanekiso ngokwayo, ngoko ke yiyo yonke i PNG ukukhupha ivelisa kwaye akukho mmiselo ususa emva koko. apho ifayile yesubtitle eyahlukileyo ikhona ecaleni kwevidiyo, ukhuphe ukusuka kumcebo ogcine isibini sihlukaniswe kwaye ii-frames ziphuma zicocekile. I-3GP iphele kwizisombululo eziphantsi kunye nesandi esiphezulu sokuthetha-thethana; ukunyusa ayizukubuyisela inkcukacha ezingazange zithathelwe indawo.

Ingaba i-PNG 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-PNG kamva ngaphandle kokuguqula i-format kwakhona. I-PNG yinketho efanelekileyo yokuthatha imifanekiso yekhusi, ilogos, umzobo womgca nantoni na enemiphetho eqinileyo okanye ebonisa ngaphaya — akukho cingo, akukho mbala obandayo.

Ingaba iifayili PNG ziya kuba zikhulu kangakanani?

Ikhulu kunalo lonke ulindeleyo, kuba PNG 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-PNG isebenzisa uxinzelelo lwe-DEFLATE ngaphezulu kwamagqabantshintshi okuskena acociweyo, ngoko ke i-pixel nganye ihlala ngokuchanekileyo, kunye ne-8-bit epheleleyo ye-alpha channel.

Kunye nobunzulu obunjani isakhelo ngasinye esikhutshwe PNG siphuma?

Ugqibo olufanayo njenge 3GP ividiyo — i-1080p 3GP ivelisa i-1920×1080 PNG iifayili; i-4K 3GP ivelisa i-3840×2160 PNG iifayili. Sebenzisa uncedo lokuphinda ubungakanani emva kokukhupha ukuba ufuna iithumbnails ezincinci okanye ubungakanani bokusika i-social-media.

Ndingayikhupha isakhelo ngasinye esitsha kwi 3GP njenge PNG?

Ewe, kodwa uqaphele ngobalo lwefayili - i-30fps 1-imizuzu 3GP ivelisa i-1,800 PNG iifayili. Sizifaka kwi-ZIP ngokuzenzekelayo. Kwiiclip ezide, ukhetho "1 ngomzuzwana" (iifayili ezi-60) okanye i-timestamps ekhethekileyo inika isiphumo esilawulwayo.

Ingaba imifanekiso ekhutshweyo PNG iya kugcina umbala ophakamileyo 3GP?

Ewe — umbala uguqulwa umbala nge-matrix esetyenziswa ngumboneleli 3GP (BT.709 ye-HD, BT.2020 ye-4K HDR). Umboneleli we-HDR udweliswe nge-tone-map kwi-SDR xa ukhupha kwi-PNG kuba i-PNG ifomati (PNG, JPG) ayikwazi ukugcina i-HDR pixel ranges ngokusemthethweni.

Yintoni ubungakanani befayili yesakhelo esitshatweyo PNG?

Ixhomekeke kwisisombululo kunye ne PNG codec. I-1080p PNG frame ihlala i-2 ukuya kwi-5 MB; i-1080p JPG kwi-quality-85 i-200 ukuya kwi-500 KB; i-4K PNG i-6 ukuya kwi-15 MB. Kwimeko ebuhlungu, i-PNG frame nganye yokukhupha i-10-minute 1080p 3GP ivelisa ~50 GB ngokupheleleyo.

Ingaba i-PNG ekhutshiweyo igcina i-EXIF metadata yekhamera?

Isiqulathi seefayili 3GP asigcinanga i-EXIF yesakhelo ngasinye ngendlela ikhamera ehlala isenza ngayo, ngoko ke ii-PNG iifayili ziphuma nge-EXIF engenanto. Sifaka `creation_time` indawo ebonisa i-source frame timestamp ukuze uphinde ulungelelanise i-bundle ngokulandelana kokuthatha.

Ithatha ixesha elingakanani ukususwa kwesakhelo ukusuka kwi 3GP ukuya kwi PNG?

Ukukhupha iframe kukhawuleza - ngokuqhelekileyo 20 ukuya 30% yobude bomthombo kwindlela eqhelekileyo yokuhambisa. Imizuzu emihlanu 3GP → PNG iqela ligqiba malunga nemizuzu enye ngaphandle kokucinga ngobalo lweeframe, kuba ibhotile yengxowa yi PNG encoder, hayi i 3GP demuxer.

Ndingazikhupha iifayili kwixesha elikhankanyiweyo le 3GP?

Ewe - ukhetho oluphambili luyakwamkela uluhlu oluhlukaniswe nge-comma lweziqinisekiso zexesha (umzekelo `00:01:23,00:05:00,00:10:42`) kwaye luvelise ifayile enye PNG ngesatifiketi sexesha. Esetyenziswa kwizifundo ezincinci zesifundo, iziganeko ezibhekisa kwimifanekiso, okanye izifundo ezide ezibonisa imifanekiso.

Ingaba i-3GP yevidiyo yam ifihlakeleyo ngexesha lokukhupha isakhelo?

Ewe - imodeli yobumfihlo efanayo neyokuguqula yonke. Umthombo wevidiyo kunye ne-PNG iframes ekhutshwe iqhubekeka kubasebenzi abakhuselekileyo kwaye isuswa kwimizuzu; akukho hlaziyo lomuntu, akukho qeqesho lwe-corpus, akukho kufikelela kweqela lesithathu.