Mataki na 1: Loda naka 3GP 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 JPEG fayiloli
3GP zuwa JPEG Tambayoyin da ake yawan yi game da Canzawa
Ta yaya zan fitar da firam na daban daga 3GP kamar JPEG hotuna?
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Ka shigar da fayil 3GP 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 3GP, an alamun shafi a matsayin fayil na daban na JPEG, kuma an haɗa shi a matsayin ZIP don saukewa.
A wane ma'aunin haske ne JPEG hotunan da aka fitar suke fitowa?
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Ma'ana ɗaya da wurin asali 3GP: 1080p 3GP na samar da firam 1920x1080 JPEG, 4K 3GP na samar da firam 3840x2160 JPEG. 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 3GP kamar JPEG?
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Na'am, amma ka lura da adadin fayil - 30 fps 1-dakika 3GP na samar da JPEG 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 3GP a kowace-firam za ta samar da ~100,000 JPEG hotuna.
Shin firam JPEG za su kiyaye sakamako na launin 3GP?
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Na'am — an canza launi da ma'adinai guda da ma'adinan asali 3GP 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 JPEG 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 JPEG da aka fitar a cikin diski?
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Yana dogara da daidaitacce da kuma zaɓin JPEG 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 3GP yana da kusan 50 GB kuma yana samun rarrabawa a cikin ZIP masu yawa.
Shin an fitar da JPEG yana riƙe da metadata EXIF na kamara?
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Wani 3GP mai riƙe da kayan aiki ba ya ɗaukar EXIF na kowane firam kamar yadda kamara mai tsayawa take yi, don haka fayilolin JPEG 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 3GP zuwa JPEG?
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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 3GP -> JPEG na minti 5 zai ƙare cikin minti 1 ko da yaushe, ko da yaushe ka zaɓa, saboda matsalar ita ce mai alamun shafi JPEG yana rubuta fayiloli da yawa masu ƙaranci a cikin daidaito, ba mai alamun shafi 3GP ba.
Shin zan iya fitar da firam a cikin bidiyo 3GP?
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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 JPEG 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 3GP 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 3GP da kuma JPEG na bundle da aka fitar a cikin ma'aikata masu tsallakewa kuma an share su cikin mintina na kammalawa.
Me yasa firam ɗin da na fitar JPEG na da duhu?
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A ko'ina ana yi wa motsi da baƙin ciki a cikin wurin asali 3GP (kamera ko abin da aka yi shiri da shi yana motsa yayin da aka kama wannan firam). Yi kokarin zaɓar lokaci daga wurare masu tsayayye, ko kuma fitar da firam da ke kusa da juna da kuma zaɓar mafi haske. Pipeline ba ta ƙona bayanai da ba su cikin asali 3GP.
Shin mai canzawa zai iya zaɓar firam ɗaya ga kowane canji na fuskar gani a cikin 3GP?
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Ba a cikin gudun farko ba — amfani da "1 a kowace sakan" preset kamar wani kwatantawa da kuma duba bundle ɗin da gani don canje-canjen fuskar. Wani mai fitar da fuskar-saukewa (da aka sarrafa da ffmpeg select=gt(fuskar)) yana kan hanyar da za'a bi kuma zai yi tashar JPEG fitarwa a ƙarshe wannan watan.
Shin zan iya amfani da firam ɗin da aka fitar JPEG a cikin kasuwanci?
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Na'am, bisa ga ko wane lasisin da ke kula da abun cikin 3GP na asali. Canjin shi ne canji na siffar - hakkin mallaka akan abun cikin yana da wanda yake da shi a kan 3GP. Ba mu ƙara wata alama ta ruwa ba, ba mu da wata takardar shaidar shigarwa, kuma ba mu yi zargin wani lasisin a kan bundle JPEG ba.
3GP shine tsarin kwantena multimedia da aka kirkira don wayoyin hannu na 3G. Yana iya adana bayanan sauti da bidiyo kuma ana amfani da shi don sake kunna bidiyo ta hannu.