MP4 → PNG

Guqula Eyakho MP4 kuya PNG amafayela kalula

Khetha amafayela akho

noma cindezela bese ususa amafayela akho lapha

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Guqula amafayela afinyelela ku-1 GB mahhala, abasebenzisi be-Pro bangaguqula amafayela afinyelela ku-100 GB; Bhalisa manje

Ukulayisha

Indlela yokuguqula MP4 kuya PNG

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 PNG amafayela

MP4 kuya PNG Imibuzo Evame Ukubuzwa Yokuguqulwa

Ngizokhipha kanjani amafreyimu kusuka ku MP4 ividiyo njenge PNG izithombe?

Layisha phezulu ihele MP4 futhi umguquli ubonisa isikhethi sefreyimu-sokukhipha: nganoma iyiphi ifreyimu ye-Nth, amafreyimu ezikhathini ezicacisiwe, noma ifreyimu eyodwa ngesekondi. Ifreyimu ngayinye ekhethiwe ikhodwe njengehele PNG elilodwa futhi lihlukaniswe njengehele le-ZIP lokulayisha.

Isithombe esikhishwayo PNG siphuma kanjani ngesinqumo?

Isinqumo esifanayo njenge-MP4 ividiyo — 1080p ikhiqiza amafreyimu angu-1920×1080 PNG; 4K ikhiqiza amafreyimu angu-3840×2160 PNG. Sebenzisa /resize-image/ ngemuva kokukhishwa uma ufuna amathumbnails amancane noma ama-social-media-sized assets.

Ingabe ngizokhipha yonke ifreyimu kusuka kuhele MP4 njenge PNG?

Yebo, kodwa uqaphele ngokubalwa kwefayela — ividiyo engu-30 fps 1-minithi ikhiqiza amafreyimu angu-1,800, futhi i-60 fps 10-minithi ikhiqiza ama-36,000. Sizifaka ngokuzenzakalela ku-ZIP. Kweziclips ezide sebenzisa "1 ngesekondi" noma isinqumo sesikhathi esikhethekile ukuze ugcine iqoqo liphathwa kahle.

Ingabe izithombe PNG zizogcina umbala MP4 olinganiselwe?

Yebo — umbala uqokwa nge-matrix efanayo esetshenziswa umsuka (BT.709 ye-HD, BT.2020 ye-4K HDR). Ama-HDR asuka ku-tone-mapped kuya ku-SDR uma ekhishwa ku-PNG (i-PNG / JPG ayikwazi ukugcina ama-pixels we-HDR ngokusemthethweni); i-tone-mapping curve ifana neyona esetshenziswa yi-mpv / ffmpeg.

Yini ubukhulu behele lwesiphequluli esikhishwayo PNG?

Kuxhomekeka kusinqumo kanye nenjongo. Ifreyimu ye-1080p PNG iyizi-2-5 MB; i-1080p JPG esezingeni-85 iyizi-200-500 KB; i-1080p WebP esezingeni-85 iyizi-100-300 KB. Ukuphindaphinda ngokubalwa kwefreyimu ukuze usize i-ZIP — ukukhishwa kwefreyimu ngayinye yevidiyo ye-10-minute 1080p njenge-PNG kuyizi-~50 GB.

Ingabe i-PNG ekhishwayo igcina noma iyiphi i-metadata yekhamera?

I MP4 i Container ayigcinanga i-EXIF nge-frame ngendlela ikhamera ehlala isebenza ngayo, ngakho i-PNG ihele elikhishwayo liphuma nge-EXIF engenanto. Sifaka i-`creation_time` indawo ekhombisa i-source frame timestamp ukuze ukwazi ukuhlela kabusha i-bundle ngokulandelelana kwesikhathi ngemuva kokukhuphula.

Ithatha isikhathi esingakanani ukukhishwa kwefreyimu kusuka ku MP4 kuya ku PNG?

Ukukhishwa kwefreyimu kushesha — 20-30% yesikhathi somthombo ku-standard pipeline. Iminithi engu-5 MP4 → PNG iqoqo liphele ngo-minithi eyodwa noma ngabe ifreyimu ibalwa, ngoba i-bottleneck yi-PNG encoder, hhayi i-demuxer.

Ingabe ngizokhipha amafreyimu eziqephuni ezikhethekile zesikhathi kwi-MP4 video?

Yebo — ukhetho oluphezulu lu accepts a comma-separated list of timestamps (e.g. `00:01:23,00:05:00,00:10:42`) futhi lukhiqiza ihele elinye PNG ngesikhathi sokufaka. Kusetshenziswa kumathumbnails esiga-nyezi, ama-scene reference shots, noma ukuletha ama-poster frames we-HTML5 video.

Ingabe i-MP4 yami yevidiyo imfihlo ngesikhathi sokukhishwa kwefreyimu?

Yebo — imodeli yobumfihlo efanayo nezo zonke iziguqulo. Ividiyo yomsuka kanye nefreyimu ekhishwe iqhubekelwa ngabasebenzi abahlukanisiwe futhi isuswa ngaphakathi kwemizuzu yokuqedwa. Akukho phrofayli ebonisane nomuntu obheka.

Kungani ama-PNG amafreyimu ami akhishwa amnyama?

Kuyinto evamile ukushaya isithombe kusuka emthonjeni (ikhamera ihamba lapho ifreyimu ithathwa khona). Zama ukukhetha ama-timestamps kusuka emibonweni ehlala njalo, noma ukhiphe amafreyimu ambalwa azungeze futhi ukhethe ocacile kakhulu. Ipayipi alikhiqizi uhlaka — ngakho, sebenzisa /upscale/ ku-PNG okhishwayo ngemuva.

Ingabe lesi sisetshenziswa sisekela ukukhishwa kwefremu eyodwa ngeshintsho lendawo?

Ayikho ku- basic flow — sebenzisa i- "1 ngesekondi" option njenge-approximation, bese ukhetha ngokubonakalayo amafreyimu woshintsho lwesizinda. Isizinda esikhethekile sokuthola isizinda (PySceneDetect-equivalent) sikhona kwi roadmap.

Ingabe ngisebenzisa amafreyimu akhishwayo PNG ngebhizinisi?

Yebo, ngaphansi kwelayisense elilawula i-MP4 isihloko somthombo. Ushintsho lwefomethi alukho ubufakazi — sifaka i-watermark, sifaka ukulandelela, futhi sicela alikho ilayisense ngaphezulu kwe-PNG okuqukethwe. Ividiyo yendawo yomphakathi ikhiqiza amafreyimu wendawo yomphakathi; isithombe sakho sihlala sakho.

MP4

Ifomethi yesitsha se-MP4 ingagcina ividiyo, umsindo, imibhalo engezansi, nezithombe kufayela elilodwa ngokucindezela okuhle kakhulu.

PNG

Amafayela e-PNG asekela ukucaca futhi asebenzisa ukucindezela okungenakulahlekelwa, okwenza afaneleke kakhulu kuma-graphics, ama-logo, kanye nezithombe-skrini.