MP4 TIFF

Sinthani Yanu MP4 ku TIFF mafayilo mosavuta

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Momwe mungasinthire MP4 ku TIFF

Gawo 1: Kwezani yanu MP4 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 TIFF mafayilo


MP4 ku TIFF Mafunso Ofunsidwa Kawirikawiri Okhudza Kusintha kwa Anthu

Kodi ndingagwiritse ntchito ma frame amodzi kuchokera ku MP4 ngati TIFF zithunzi?
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Kutsitsa fayilo ya MP4 ndi wosinthira amatulutsa chisankho cha frame-extraction: chilichonse cha Nth frame, ma frame panthawi yofunikira, kapena chiwonetsero chimodzi pasecond.Katundu uliwonse wosankhidwa umasunthidwa kuchokera ku MP4 video stream, amasinthidwa kukhala fayilo ya TIFF yosiyana, ndipo imaphatikizidwa ngati ZIP yotsitsa. MP4 ndi ISO / IEC 14496-14, standardized mu 2001 ndi anachokera pamodzi QuickTime katundu layout MOV ntchito. TIFF ndi Tagged Image File Format kuchokera 1986, ndipo ndi mtundu wa skanning, kufalitsa ndi archiving makampani standardized pa.
Sikuti ngati ndi mndandanda wa subtitle wachikhalidwe. A MP4 amasunga ma subtitle monga ma stream awo okha ndipo wosewera amawapanga pazithunzi nthawi yosewera, kotero decoded frame yomwe wosintha amalemba ngati TIFF ili ndi pixels oyera pansi. Ma subtitle omwe adasungunuka mu kanemayo asanakhale MP4 ndi nkhani ina - pomwepo ndi gawo la chithunzicho ndipo chilichonse chopangidwa ndi frame chimasunga iwo.
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 TIFF pambuyo pake popanda kusintha mtundu. TIFF imagwira ntchito ndi CMYK, 16-bit deepness, embedded ICC profiles ndi multi-page documents, zomwe ndi zomwe zimafunikira zosindikiza ndi zosunga zobwezeretsera.
Kukula kwakukulu kuposa momwe mungayembekezere, chifukwa TIFF 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. TIFF ndi chonyamula zambiri kuposa codec: likhoza kunyamula uncompressed, LZW, ZIP kapena ngakhale JPEG deta, pa mpaka 32 bits pa channel, ndi masamba ambiri mu fayilo imodzi.
Kuwala kofanana ndi choyamba MP4: 1080p MP4 kumabweretsa 1920x1080 TIFF ma frame, 4K MP4 kumabweretsa 3840x2160 TIFF ma frame. Wosinthayo sasintha kapena kuchepetsa - ma pixels amachokera pa frame yosinthidwa. Musanagwiritse ntchito /resize-image/ ngati mukufuna zithunzi zochepa.
Ndino, koma ganizirani kuchuluka kwa fayilo - 30 fps 1-mphindi MP4 imapanga 1,800 TIFF mafremu. Timawapaka m'chigawo chimodzi cha ZIP mwamsanga. Kwa mavidiyo ochepa, yesani "1 pa mphindi" (60 mafremu pa mphindi) kapena kusankha nthawi yoyenera. Ora la MP4 pa mafremu onse lidzapanga ~100,000 TIFF zithunzi.
Ndikoyenera - mtundu umasinthidwa ndi mapangidwe omwewo omwe amapezeka patsamba la MP4 (BT.709 kwa HD, BT.2020 kwa 4K HDR). Mafuta a HDR amasinthidwa ku SDR pamene akugwiritsidwa ntchito ku TIFF omwe sangathe kusungira ma pixel a HDR mwanjira yachibadwa (JPG, PNG-8).
Kutengera pa resolution ndi TIFF codec kusankhidwa: 1080p PNG frame ndi 2-5 MB yopanda kusowa, 1080p JPG pa 85 quality ndi 200-500 KB. Kuwonjezeka kwa mitengo ya frame kuti muchepetse ZIP - pamapeto pake, kutulutsa kwa PNG kwa 10-1080p MP4 kwa 10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-1
MP4 chonyamula sichimangokhala ndi EXIF pa frame momwe kamera ikugwirira ntchito, kotero mafayilo a TIFF amatuluka ndi ma blocks EXIF opanda pake. Wosintha amagwiritsa ntchito `creation_time` field yomwe imasonyeza nthawi yoyambira ya frame, kuti muthe kubwezeretsa bundle m'njira yoyenera kapena kugwirizana ndi masamba a subtitle / chapter.
Kusintha kwa frame ndi kosavuta - nthawi zambiri 20-30% ya nthawi yochokera. 5-mphindi MP4 -> TIFF bundle imatha m'miphindi 1 popanda kutengera kuti ndi mapazi angati omwe mumasankha, chifukwa chingwe ndi TIFF encoder kulemba mafayilo ambiri ochepa mofanana, osati MP4 demuxer.
Ndiyo — njira yowonjezera ya timestamp imavomereza mndandanda wogawidwa ndi koma (mwachitsanzo `00:01:23, 00:05:00, 00:10:42.5`) ndipo imapanga fayilo imodzi TIFF pa timestamp. Ndikothandiza kwa thumbnails ya chapter, zithunzi zokhudzana ndi scene, kapena kulenga bokosi la mauthenga kuti lifufutidwe.
Yesani - mtundu wofanana wa privacy monga pazosintha zonse. Choyamba MP4 ndi TIFF chosakira chimachitidwa m'mabungwe osiyana ndi omwe amachotsa m'maola angapo a kumaliza.

MP4

Mtundu wa chidebe cha MP4 ukhoza kusunga makanema, mawu, mawu omasulira, ndi zithunzi mu fayilo imodzi yokhala ndi kukanikiza kwabwino kwambiri.

TIFF

Mafayilo a TIFF amathandizira kuzama kwa ma bit ambiri komanso kupsinjika kosataya, komwe ndi koyenera kujambula zithunzi ndi kusindikiza mwaukadaulo.


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