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 MP4 fayiloli
3GP zuwa MP4 Tambayoyin da ake yawan yi game da Canzawa
Ta yaya zan sake encode 3GP zuwa MP4 ba tare da rasa ingancin bidiyo ba?
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Ka saukar da fayil ɗinka 3GP kuma mai canzawa zai yi aiki da wani CRF-da aka gina kan sake-sauya-kodi mai nufin fitarwa mai gani-ba-da-hasara MP4 (CRF 18 bisa diff, ƙananan kimar = fitaccen fayil / mafi kyawun inganci). An zaɓi codec don ya haɗu da MP4 ƙofar — H.264 don MP4 mai girma, H.265 don MKV mai girma, VP9 ga WebM, AV1 ga sabon pipes. 3GP yana da H.263 ko MPEG-4 Sashe na 2 bidiyo tare da AMR narrowband magana sauti, duk tuned ga mafi ƙarancin bitrate fiye da inganci. A kusa da dukan MP4 a cikin daji ne H.264 bidiyo da AAC sauti; da kwandon kuma doka ke da HEVC, AV1 da VP9.
An iya canja 3GP zuwa MP4 ba tare da sake encoding bidiyo ba?
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Ya, kuma wannan shi ne hanya mai sauri. 3GP da MP4 suna raba irin wannan tsari na akwatin da ke ƙasa, don haka ana kwafe bidiyon da sauti a cikin bayt-by-byte kuma kawai an sake rubuta ƙofar ƙofar. Ba a decode komai ba kuma ba a sake ƙuntata komai ba, don haka fayil mai tsawo na fasali zai ƙare cikin minti daya a maimakon awa daya, tare da ingancin fitarwa na daidai da na asali. 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. MP4 ne ISO/IEC 14496-14, standardized a cikin 2001 da kuma dauke daga irin QuickTime akwatin zane MOV amfani.
Yanzu. 3GP ba ta da wata hanyar amfani da sautin-ƙasa-ƙasa, don haka an buɗe sautin-ƙasa ga 3GP abun ciki cikin hoton ko kuma an aika da shi kamar fayil na daban. MP4 yana da sautin-ƙasa kamar yadda za'a iya zaɓar su a cikin ruwa, don haka bayan canjawa zaka iya haɗa wata hanyar SRT da mai kallo zai iya kunna, kashe ko kuma sake fasalin.
Shin, za a yi wasa da MP4 a cikin wani shafukai idan 3GP bai yi ba?
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Yanzu, wannan shi ne dalilin da ya sa aka yi wannan canji. 3GP da aka saka cikin wani shafi na yanar gizo yana nuna wani mai wasa da ya karya ko kuma yana tilasta wani saukewa, saboda masu bincike ba su da wani mai decoder don shi. MP4 yana wasa cikin layin ta hanyar ɓangaren bidiyo na HTML5 na asali ba tare da wata ƙara ba da kuma ba tare da wata shirin ayuka na waje ba. MP4 shi ne mafi aminci da yiwuwar isar da manufa - duk wayar hannu, mai bincike, console, mai shiryawa da Smart TV gina a cikin ƙarni na ƙarshe yana wasa da shi ba tare da kayan aikin ƙari ba.
Wanne codec na bidiyo ne fitarwa MP4 take amfani dashi?
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Yana dogara ga kwandon MP4. MP4 na da ƙa'idodin H.264 domin mafi fadin goyon baya na wasa a kan wayoyin hannu, masu bincike, da Smart TVs. MKV na da ƙa'idodin H.265 / HEVC don kusan rabin girman fayil da inganci mai kama. WebM na da ƙa'idodin VP9. Zaɓuɓɓukan ci gaba suna nuna zaɓin codec mai bayyananne idan kana buƙatar canza shi.
Shin za'a iya canza waƙoƙina na sauti daga 3GP zuwa MP4?
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Yanzu. Idan 3GP da MP4 sun raba wani codec na sauti (misala, suna da AAC), za'a sake-muxed sauti ba tare da sake-encoding ba - bit-identical. Idan codecs sun bambanta, za'a sake-encoding sauti zuwa AAC / Opus / Vorbis dangane da abin da ƙuƙuman MP4 ke goyon baya. An riƙe sauti na shirye-shirye da yawa (koyarwar, harsuna daban-daban).
Shin zan iya riƙe ƙimar firam na farko idan na canja 3GP zuwa MP4?
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A matsayin diff, na'am — 24fps 3GP zai zauna 24fps a cikin MP4; 60fps 3GP zai zauna 60fps. Idan kana buƙatar canza adadin (misali, interlaced 29.97 → progressive 30, ko 60 → 30 don haɗe-haɗe), zaɓin adadin firam zai kula da 3:2 pulldown, deinterlacing, da frame-blending a cikin mataki na encoding guda.
Menene girman fayil ɗin da zai canza daga 3GP zuwa MP4?
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Re-mux na codec-daidai (3GP H.264 → MP4 H.264 kawai yana canja kwandon): kusan girman da ya daidaita. Canjin codec na iya yin tasiri: H.264 → H.265 na iya raba fayil zuwa rabin a matsayin ingancin gani; VP9 yana da daidaituwa; AV1 na yanke wani 20-30% amma yana da sauri wajen encoding.
Shin fayil MP4 zai iya wasa a kan iPhone, Android, da Smart TVs?
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MP4 / H.264 yana wasa da asali akan kowane na'ura mai zamani. MOV / H.264 yana wasa a kan na'urorin Apple da yawa TV amma ba koyaushe ba a kan Android na daɗaɗɗen. MKV yana buƙatar VLC akan iOS. WebM shine mai bincike na farko. Zaɓuɓɓukan ci gaba sun haɗa da "haɗin kai na na'ura" da aka ƙayyade da ke zaɓar mafi aminci MP4 codec / kwandon don manufarka. MP4 na goyon bayan wani nau'in rubutu na ƙarshe kawai (mov_text), kuma sauti mai layuka da yawa ba a yarda da shi ba a waje da masu wasa na kwamfyuta.
Menene lokacin da za'a yi wa canja bidiyo mai awa 1 zuwa 3GP zuwa MP4?
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Re-mux na codec-daidai yana kusa da lokaci-da-lokaci - sakan 30 zuwa 60 ga fayil na sa'a 1. An sake-encode na codec-da-gaske yana tafiya a kusan 0.3-0.7x lokacin asali a kan GPU pipeline ɗinmu, don haka 1-hour 3GP → MP4 ya ƙare cikin minti 18-40 dangane da daidaita da manufar codec.
Mene ne mafi girman ma'aunin rarraba da ake goyon baya ga 3GP zuwa MP4?
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Zuwa 8K (7680×4320) akan Premium plans. Free conversions are capped at 4K (3840×2160) by the per-file size limit. HDR metadata (HDR10, HDR10+, Dolby Vision when present) is carried through where both 3GP and MP4 containers support it.
Shin 3GP bidiyo na na sirri ne yayin canjawa zuwa MP4?
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Yanzu. An yi amfani da fayilolin bidiyo da aka canza zuwa cikin aiki na musamman, ba a gani ba ta mutum, ba a sanya su cikin indiya ba, kuma an share su cikin mintina na kammalawa. An yi takardar tagar tsarewa a /privacy/ kuma ba mu wallafa wata ƙungiya ta koyarwar daga canzawa daga mai amfani 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.
