3GP → BMP

Maida Naka 3GP zuwa BMP fayiloli da wahala

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Ana lodawa

Yadda ake canzawa 3GP zuwa BMP

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 BMP fayiloli

3GP zuwa BMP Tambayoyin da ake yawan yi game da Canzawa

Ta yaya zan fitar da firam na daban daga 3GP kamar BMP hotuna?

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 BMP, kuma an haɗa shi a matsayin ZIP don saukewa. 3GP shi ne mai riƙe da 3GPP standardized ga farko wayar hannu, lokacin da bidiyo ya kamata ya dace da 176x144 allon da 2G data plan. BMP shine Windows Bitmap, format ɗin raster na ƙanƙanta wanda aka ƙera cikin Windows tun daga 1985.

Shin zan iya samun BMP frame ba tare da sunaye ba?

Idan 3GP ba ta taba rubuta su ba, saboda 3GP ba ta da wani maɓalli na zaɓar maɓallin ƙarya da za'a iya rufe. Duk abin da 3GP ke nunawa akan fuskar kwamfyuta yana cikin hoton kansa, don haka yana cikin duk BMP da aka fitar da shi kuma babu wani tsari da zai cire shi bayan haka. Idan akwai fayil na ƙarya daban a kusa da bidiyo, fitar da shi daga wani maɓalli da ya riƙe su biyu dabam kuma firam ɗin za su fito da kyau. An hana 3GP a cikin matsaloli masu ƙaranci da sauti mai darajar magana; ƙara girman shi ba zai dawo da bayani ba wanda ba'a taba kamawa ba.

Mene ne girman fayilolin BMP?

Mafi girma fiye da yadda kake tsammani, saboda BMP 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. BMP na da alama yana adana layuka na pixels da ba'a ƙuntata su ba da wani babban fayil mai ƙarancin girma, wanda shi ne dalilin da ya sa yake da sauƙin rarrabawa.

A wane ma'aunin haske ne BMP hotunan da aka fitar suke fitowa?

Ma'ana ɗaya da wurin asali 3GP: 1080p 3GP na samar da firam 1920x1080 BMP, 4K 3GP na samar da firam 3840x2160 BMP. 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 BMP?

Na'am, amma ka lura da adadin fayil - 30 fps 1-dakika 3GP na samar da BMP 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 BMP hotuna.

Shin firam BMP za su kiyaye sakamako na launin 3GP?

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 BMP 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 BMP da aka fitar a cikin diski?

Yana dogara da daidaitacce da kuma zaɓin BMP 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 BMP yana riƙe da metadata EXIF na kamara?

Wani 3GP mai riƙe da kayan aiki ba ya ɗaukar EXIF na kowane firam kamar yadda kamara mai tsayawa take yi, don haka fayilolin BMP 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 BMP?

An yi sauri wajen cire alamun shafi - a kan 20-30% na lokacin da ake amfani da shi. Ɗaya daga cikin 3GP -> BMP na minti 5 zai ƙare cikin minti 1 ko da yaushe, ko da yaushe ka zaɓa, saboda matsalar ita ce mai alamun shafi BMP 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?

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 BMP 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?

Na'am — irin wannan siffar sirri kamar duk canji. An yi aiki da tushen 3GP da kuma BMP 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 BMP na da duhu?

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.

3GP

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.