Sinthani M4V ku PNG

Sinthani Yanu M4V ku PNG zolemba molimbika

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Kukweza

Momwe mungasinthire M4V ku PNG

Gawo 1: Kutumiza wanu M4V kutengerapo ndi kuchotsa mafayilo pogwiritsa ntchito batani pamwambapa kapena ndi Shift ndi dziko.

Gawo 2: Dinani 'Transform' batani kuti ayambe kusintha.

Gawo 3: Yamba wanu anasintha PNG mafayilo

M4V ku PNG Mafunso Ofunsidwa Kawirikawiri Okhudza Kusintha kwa Anthu

Kodi ndingagwiritse ntchito ma frame kuchokera ku M4V kanema ngati PNG zithunzi?

Kutsitsa fayilo ya M4V ndipo wosintha amatulutsa chisankho cha frame-extraction: chilichonse cha Nth frame, ma frame panthawi yofunikira, kapena chiwonetsero chimodzi pasecond. Gawo lililonse losankhidwa limayikidwa ngati fayilo ya PNG yosiyana ndipo limaphatikizidwa ngati ZIP yotsitsa.

Ndi khalidwe liti lomwe chithunzi cha PNG chimatuluka?

Kuwala kofanana ndi M4V kanema - 1080p chiyambi chimatulutsa 1920 × 1080 PNG ma frame; 4K chiyambi chimatulutsa 3840 × 2160 PNG ma frame. Resize pambuyo pochotsa ngati mukufuna thumbnails ochepa.

Kodi ndingagwiritse ntchito ma frame onse kuchokera ku fayilo ya M4V ngati PNG?

Ndikuvomereza, koma ganizirani za kuchuluka kwa fayilo - kanema wa 30fps wa mphindi imodzi umapanga ma frame 1,800. Timayika ma ZIP archives mwamsanga. Kuti mupange ma clip ochepa, dinani "1 pa mphindi" (ma frame 60) kapena dinani "Time Stamp" (kulemba nthawi).

Kodi PNG zithunzi zidzasunga M4V kujambula kwa mtundu?

Ndikoyenera - mtundu umasinthidwa ndi mapangidwe omwe amagwiritsa ntchito M4V (BT.709 kwa HD, BT.2020 kwa 4K HDR). Mafuta a HDR amasinthidwa ku SDR pamene akugwiritsidwa ntchito ku PNG (PNG / JPG sangathe kusungira ma pixel a HDR mwanjira yokha).

Kodi ndi kukula kwa fayilo ya PNG ya frame?

Kutengera pa kusankhidwa kwa chisankho ndi codec. 1080p PNG frame ndi 2-5 MB; 1080p JPG quality-85 frame ndi 200-500 KB. Kuwonjezeka ndi kuchuluka kwa ma frame kuti muchepetse ZIP - pamapeto pake, kuchotsa kwa ma frame onse a 10-min 1080p video pa PNG ndi ~ 50 GB.

Kodi PNG yosanduka imasunga EXIF metadata ya kamera?

M4V yokhala ndi M4V siyimasunga EXIF pa frame momwe kamera ikugwirira ntchito, choncho PNG mafayilo amatuluka ndi EXIF yopanda pake. Timayika `creation_time` yokhala ndi nthawi yoyambira ya frame kuti muthe kubwezeretsa bokosi.

Kodi nthawi yayitali bwanji kuti mutenge ma frame kuchokera ku M4V kupita ku PNG?

Kutulutsa kwa frame ndi kosavuta - nthawi zambiri 20-30% ya nthawi yoyambira pa standard pipeline. 5-mphindi M4V → PNG bundle imatha m'miphindi 1 popanda kusiyana ndi kusiyana kwa frame, chifukwa chingwe ndi PNG encoder, osati demuxer.

Kodi ndingagwiritse ntchito ma frame panthawi yofunikira pa M4V kanema?

Ndiyo — njira yophunzirira imavomereza mndandanda wa ma timestamps ogawidwa ndi koma (mwachitsanzo `00:01:23,00:05:00,00:10:42`) ndipo imatulutsa fayilo imodzi ya PNG pa timestamp. Ndikothandiza kwa mathumbnail a bokosi kapena zithunzi zokhudzana ndi bokosi.

Kodi M4V kanema wanga ndi wapadera pamene ndimachotsa ma frame?

Yesani - chitsanzo cha privacy chimodzimodzi ngati chilichonse chosinthira.Source video ndi zosapanga dzimbiri zitsulo zimathetsedwa m'maola ogwira ntchito osiyana ndi kuchotsa m'maola ochepa.

N'chifukwa chiyani ma frame anga a PNG omwe adachotsedwa ndi opanda malire?

Kutalika kwa kuwala kwa motion blur kuchokera ku bungwe M4V (kamera inayenda pamene frame inathawa). Yesetsani kuchotsa timestamps kuchokera ku mafilimu osasinthasintha, kapena chotsani frame angapo ozungulira ndikusankha amene ndi owala kwambiri. Pipeline siyipanga kuwala.

Kodi ntchitoyi imathandiza kuchotsa chithunzi chimodzi pa kusintha kwa chithunzi?

Sichipezeka mu njira yoyamba - kugwiritsa ntchito "1 pa mphindi" monga njira yowerengera, kenako kujambula zithunzi zosintha zithunzi. M'mabuku a maphunziro pali njira yopezera zithunzi zosintha zithunzi.

Kodi ndingagwiritse ntchito ma frame a PNG ochokera ku malonda?

Ndikofunika, malinga ndi lisensi yomwe imayendetsa masamba a M4V. Kusintha kwa mtundu sikungawonjezere chitsimikizo - sitiwonjezera chitsimikizo cha madzi ndipo sitivomereza chitsimikizo pa PNG.

M4V

M4V ndi Apple mtundu wa MP4 kuti angagwiritsidwe ntchito FairPlay DRM, amene ndi zimene amaletsa ena osewera kuchokera kutsegulira.

PNG

Mafayilo a PNG amathandizira kuwonekera bwino ndipo amagwiritsa ntchito kukanikiza kosataya, zomwe zimapangitsa kuti akhale abwino kwambiri pazithunzi, ma logo, ndi zithunzi.