M4V → PNG

Sinthani Yanu M4V ku PNG mafayilo mosavuta

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Momwe mungasinthire M4V ku PNG

Gawo 1: Kwezani yanu M4V mafayilo pogwiritsa ntchito batani lomwe lili pamwambapa kapena pokoka ndi kugwetsa.

Gawo 2: Dinani batani la 'Convert' kuti muyambe kusintha.

Gawo 3: Tsitsani pulogalamu yanu yosinthidwa PNG mafayilo

M4V ku PNG Mafunso Ofunsidwa Kawirikawiri Okhudza Kusintha kwa Anthu

Kodi ndingapeze bwanji ma frame kuchokera ku M4V kanema ngati PNG zithunzi?

Kutsitsa kwa M4V ndi wosintha amatulutsa chisankho cha frame-extraction: chilichonse cha Nth frame, ma frame a nthawi yoyenera, kapena chiwonetsero chimodzi pa mphindi. Chosankha chilichonse chimasinthidwa ngati fayilo ya PNG ndipo zonse zimaphatikizidwa mu ZIP archive kuti mutsitsa. M4V ndi mtundu wa Apple wa MP4, ntchito ndi iTunes ndi Apple TV app kwa mafilimu ndi TV ziwonetsero za. PNG anapangidwa mu 1996 monga patent-free kuchotsa kwa GIF, ndi anayamba webusaiti default lossless chithunzi mtundu.

Kodi ma subtitle adzawonekera pa PNG ma frame omwe ndimatulutsa?

Sikuti ngati ndi mndandanda wa subtitle wachikhalidwe. M4V amasunga subtitle ngati mtsinje wawo wapadera ndipo wosewera amawapanga pazithunzi nthawi yosewera, kotero chiwonetsero chosinthidwa chomwe wosintha amalemba ngati PNG chili ndi ma pixels oyera pansi. Subtitles omwe adasungunuka mu kanemayo asanakhale M4V ndi chinthu china - mpaka pamenepo ndi gawo la chithunzicho ndipo chilichonse chopangidwa chimasunga iwo.

Kodi ndingatenge PNG imodzi kuchokera ku gawo lililonse la M4V?

Si monga batani limodzi, koma M4V imapangitsa kuti zikhale zosavuta: masamba omarkidwa amasungidwa m'mabokosi monga nthawi yotchedwa, choncho werengani mndandanda wa masamba kuchokera pa fayilo ndi kuika nthawiyo m'malo a nthawi. Mumapeza PNG imodzi patsamba, m'njira, yomwe ndi njira yofala yopanga mathumbnail kwa kujambula kotalika. Mafuta osapanga masamba omarkidwa akukupangitsani kusankha zithunzi ndi maso. M4V amasunga Chapter olemba, ntchito zojambulajambula ndi subtitle nyimbo mu mawonekedwe a Apple TV app amayembekezera, amene MP4 mosavuta nthawi zambiri amawononga.

Kodi PNG imathandizira kuwala?

Format imagwira ntchito, koma chiyambicho sichimakhala ndi alpha kuti ipereke - ma frame a video ndi masamba opangidwa ndi mawonekedwe owoneka bwino, kotero kuti ma pixel onse amafika molimba. Chingwe cha alpha chimakhala chothandiza pambuyo pake: kumatanthauza kuti mutha kuchotsa chinthu kuchokera ku PNG pambuyo pake popanda kusintha mtundu. PNG ndi kusankha koyenera kwa zithunzi, malogo, line art ndi chilichonse ndi zosalimba mapiko kapena kuwala - palibe kuyimba, palibe kuwala band.

Kodi ndi chiyani chofunikira pa PNG mafayilo?

Kukula kwakukulu kuposa momwe mungayembekezere, chifukwa PNG imasunga ma pixel onse moyenera kuposa kuyerekezera. 1080p imakhalabe pafupi ndi 2-5 MB ndipo 4K imakhalabe pafupi ndi 6-15 MB, kotero kutulutsa kwanthawi yayitali kumawonjezera mwachangu. Izi ndi malonda abwino pamene zithunzi zimatha kutulutsa kuwongolera, ndipo zoyipa pamene zikuyenda mozungulira patsamba la webusaiti. PNG amagwiritsa ntchito DEFLATE kuchotsa pa scanlines zofiltered, choncho aliyense pixel ali ndi moyo moyenera, kuphatikizapo 8-bit alpha channel.

Kodi ndi yankho liti lomwe limatuluka pa PNG ya frame yomwe imatulutsidwa?

Kusintha kwachidziwitso chofanana ndi M4V kanema - 1080p M4V imapanga 1920 × 1080 PNG mafayilo; 4K M4V imapanga 3840 × 2160 PNG mafayilo. Pezani ntchito yosintha kukula pambuyo potulutsa ngati mukufuna mathumbnail ochepa kapena masamba amtundu wa media media.

Kodi ndingagwiritse ntchito chilichonse chamatabwa kuchokera ku M4V ngati PNG?

Ndikuvomereza, koma onetsetsani kuti muwerenge fayilo - 30fps 1-mphindi M4V imapanga 1,800 PNG ma frame. Timawapaka m'manja mwa ZIP mwamsanga. Kwa ma clip ochepa, "1 pa mphindi" (60 ma frame) kapena nthawi yoyenera imapatsa zotsatira zoyenera.

Kodi zithunzi zosakira PNG zidzasunga M4V kujambula kwa mtundu?

Ndikoyenera - mtundu umasinthidwa ndi mamatrix omwe amagwiritsa ntchito M4V (BT.709 kwa HD, BT.2020 kwa 4K HDR). Ma HDR amapangidwa ndi SDR pazotulutsa ku PNG chifukwa cha PNG zosiyanasiyana (PNG, JPG) sizingatheke kusungira ma pixels a HDR.

Kodi ndi chiyani kukula kwa fayilo ya chiwonetsero cha PNG chosatsegulidwa?

Kutengera pa resolution ndi PNG codec. 1080p PNG frame ndi 2 mpaka 5 MB; 1080p JPG pa quality-85 ndi 200 mpaka 500 KB; 4K PNG ndi 6 mpaka 15 MB. Pamapeto pake, kutulutsa kwa PNG kwa 10-minute 1080p M4V kumapanga ~ 50 GB pamodzi.

Kodi PNG yosanduka imasunga metadata ya kamera ya EXIF?

Kuyika kwa M4V sikungasungire EXIF pa frame momwe kamera ikugwira ntchito, kotero mafayilo a PNG amatuluka ndi EXIF yopanda pake. Timayika `creation_time` yokhala ndi nthawi yoyambira ya frame kuti muthe kubwezeretsa bundle ndi kujambula.

Kodi nthawi yayitali bwanji kuti mutenge chiwonetsero chazithunzi kuchokera ku M4V kupita ku PNG?

Kutulutsa kwa frame ndi kosavuta - nthawi zambiri 20 mpaka 30% ya nthawi yoyambira pa standard pipeline. 5-mphindi M4V → PNG bundle imatha m'maola pafupifupi mphindi imodzi popanda kusiyana ndi kusiyana kwa frame, chifukwa choletsa ndi PNG encoder, si M4V demuxer.

Kodi ndingagwiritse ntchito ma frame pa nthawi yoyenera mu M4V?

Ndiyo — njira yophunzirira imavomereza mndandanda wa timestamps osiyana ndi koma (mwachitsanzo `00:01:23,00:05:00,00:10:42`) ndipo imapanga fayilo imodzi PNG pa timestamp. Ndi zothandiza kwa thumbnails za chapter, scene reference shots, kapena thumbnailing ya maphunziro ochepa.

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.