Mataki na 1: Loda naka MP4 fayiloli ta amfani da maɓallin da ke sama ko ta hanyar ja da sauke su.
Mataki na 2: Danna maɓallin 'Maida' don fara hira.
Mataki na 3: Sauke fayil ɗin da aka canza TIFF fayiloli
MP4 zuwa TIFF Tambayoyin da ake yawan yi game da Canzawa
Ta yaya zan fitar da firam na daban daga MP4 kamar TIFF hotuna?
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Ka shigar da fayil MP4 kuma mai maida zai nuna mai zaɓar fitar da firam: kowace firam ta Nth, firam a lokacin da aka ƙayyade, ko firam ɗaya a kowane sakan. An canza alamun shafi na kowace firam da aka zaɓa daga zubin bidiyo na MP4, an alamun shafi a matsayin fayil na daban na TIFF, kuma an haɗa shi a matsayin ZIP don saukewa. MP4 ne ISO/IEC 14496-14, standardized a cikin 2001 da kuma dauke daga irin QuickTime akwatin zane MOV amfani. TIFF shi ne Format na Fayil na Hoto mai Dauke da Alama daga 1986, kuma shi ne format na scanning, publishing da kuma masana'antu na adana bayanai da aka ƙaddara a kan.
Shin za'a nuna sassaƙan rubutu cikin TIFF firam da na fitar?
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Ba idan sun kasance wani irin wando na ƙarshe na gaskiya ba. MP4 na riƙe ƙarshen waƙa kamar yadda yake da shi kuma mai wasa yana kwafa su a kan hoton a lokacin wasa, don haka firam ɗin da aka canza shi wanda mai maida ke rubutawa kamar TIFF yana da pixels masu tsafta a ƙasansa. Ƙarshen waƙa da aka buga cikin bidiyo kafin ya zama MP4 wani abu ne daban — a wannan lokacin su ne ɓangaren hoton kuma duk firam ɗin da aka fitar yana riƙe su.
Shin fitarwa TIFF tana goyon bayan ɓoyayyiyar haske?
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Wannan sifar tana da, amma mai samarwa ba shi da alfa don ya ba shi — firam ɗin bidiyo da shafuka masu nunawa suna da launi mai launi, don haka duk piksel na zuwa da ƙarfi. Shirin alfa yana da amfani a bayan haka: yana nufin zaka iya yanke wani abu daga TIFF bayan haka ba tare da canja sifar ba. @ action
Mene ne girman fayilolin TIFF?
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Mafi girma fiye da yadda kake tsammani, saboda TIFF yana riƙe duk pixel daidai ba tare da kusantar ba. 1080p na ci gaba da zama a kusa da 2-5 MB kuma 4K yana ci gaba da zama a kusa da 6-15 MB, don haka wani dogon tafiyar da fitarwa na ƙarawa cikin sauri. Wannan shi ne daidai lokacin da hotunan ke ci gaba da sarrafawa, kuma ba daidai ba lokacin da suke tafiya kai tsaye zuwa wani shafi na yanar gizo. TIFF wani akwatin da ya fi codec: zai iya riƙe bayanai ba-da-ƙuƙumi, LZW, ZIP ko har ma JPEG, a har zuwa bita 32 ga kowace hanya, da shafuka da yawa a cikin fayil guda.
A wane ma'aunin haske ne TIFF hotunan da aka fitar suke fitowa?
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Ma'ana ɗaya da wurin asali MP4: 1080p MP4 na samar da firam 1920x1080 TIFF, 4K MP4 na samar da firam 3840x2160 TIFF. Mai musanya ba ya kara girma ko rage girman firam — ana cire girman piksel kai tsaye daga firam ɗin da aka canza girmansa. Yi amfani da /resize-image/ bayan fitarwa idan kana buƙatar hotunan ƙananan.
Shin zan iya fitar da kowace firam na MP4 kamar TIFF?
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Na'am, amma ka lura da adadin fayil - 30 fps 1-dakika MP4 na samar da TIFF firam 1,800. Muna sanya su cikin wata ZIP ta atomatik. Ga bidiyo mai tsawo, ka fi son "1 a kowace sakan" da aka ƙayyade (60 firam a kowace minti) ko ka zaɓi wasu lokaci-da-saita. Wata sa'a ta MP4 a kowace-firam za ta samar da ~100,000 TIFF hotuna.
Shin firam TIFF za su kiyaye sakamako na launin MP4?
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Na'am — an canza launi da ma'adinai guda da ma'adinan asali MP4 ke nunawa (BT.709 ga HD, BT.2020 ga 4K HDR). An yi ma'adinai na HDR da maɓallin-tone zuwa SDR lokacin da ake fitarwa zuwa TIFF wanda ba zai iya adana yankuna na piksel na HDR ba (JPG, PNG-8). Yi niyya ga PNG-16 ko TIFF mai girman bita idan kana buƙatar kiyaye yankuna masu sauya-sauya.
Mene ne girman firam TIFF da aka fitar a cikin diski?
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Yana dogara da daidaitacce da kuma zaɓin TIFF codec: firam na 1080p PNG yana da 2-5 MB ba tare da asara ba, firam na 1080p JPG mai inganci 85 yana da 200-500 KB. Ka riƙa ƙidaya da ƙididdigar firam don girman ZIP — a mafi girma, duk fitarwa ta firam na PNG na minti 10 na 1080p MP4 yana da kusan 50 GB kuma yana samun rarrabawa a cikin ZIP masu yawa.
Shin an fitar da TIFF yana riƙe da metadata EXIF na kamara?
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Wani MP4 mai riƙe da kayan aiki ba ya ɗaukar EXIF na kowane firam kamar yadda kamara mai tsayawa take yi, don haka fayilolin TIFF suna fitowa da kwalaye EXIF marasa amfani. Mai maida yana ƙunsa wani filin `creation_time` wanda ke nuna zuwa lokacin firam na asali, don haka zaka iya sake-sarrafa ƙuƙumma cikin tsari na lokaci ko kuma danganta da alamomin ƙarshen rubutu / babi.
Da yawa lokaci ake buƙata don fitar da firam daga MP4 zuwa TIFF?
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An yi sauri wajen cire alamun shafi - a kan 20-30% na lokacin da ake amfani da shi. Ɗaya daga cikin MP4 -> TIFF na minti 5 zai ƙare cikin minti 1 ko da yaushe, ko da yaushe ka zaɓa, saboda matsalar ita ce mai alamun shafi TIFF yana rubuta fayiloli da yawa masu ƙaranci a cikin daidaito, ba mai alamun shafi MP4 ba.
Shin zan iya fitar da firam a cikin bidiyo MP4?
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Na'am — zaɓin lokaci mai zurfi yana karɓar jerin da aka raba da koma (misali `00:01:23, 00:05:00, 00:10:42.5`) kuma yana samar da fayil TIFF guda a kowace lokacin da aka raba. Yana da amfani ga hotunan ƙananan fannoni, hotunan alaƙa da fuska, ko kuma gina takardar abokin hulɗa don duba.
Shin MP4 na na sirri ne yayin fitar da firam?
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Na'am — irin wannan siffar sirri kamar duk canji. An yi aiki da tushen MP4 da kuma TIFF na bundle da aka fitar a cikin ma'aikata masu tsallakewa kuma an share su cikin mintina na kammalawa.
