Guqula MP4 ukuba FLV

Guqula Eyakho MP4 ukuba FLV amaxwebhu ngokulula

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*Iifayile zicinyiwe emva kweeyure ezingama-24

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Iyalayisha

Indlela yokuguqula MP4 ukuba FLV

Inyathelo 1: Layisha eyakho MP4 iifayile usebenzisa iqhosha elingasentla okanye ngokutsala nokuwisa.

Inyathelo lesi-2: Cofa iqhosha elithi 'Guqula' ukuze uqalise ukuguqula.

Inyathelo lesi-3: Khuphela i-converted yakho FLV iifayile

MP4 ukuba FLV Imibuzo Ebuzwa Rhoqo Ngokuguqula

Ndiyiguqula njani i-MP4 ibe yi-FLV ngaphandle kokulahleka komgangatho?

Layisha phezulu ifayili MP4 kwaye umguquli wethu usebenzise i-CRF-esekelwe kwi-encoding ephindayo ebhekisa kwi-visually-lossless FLV i-output (CRF 18 ngokumiselweyo, ngaphantsi = enkulu / ubunjani obuphezulu). I-codec ikhethiwe ukuhambelana ne FLV ibhokisi — H.264 / H.265 / VP9 / AV1 njengoko kufanelekile.

I-codec eyiphi esetyenziswa yi-FLV?

Oku kuxhomekeke kwisiqulathi seefayili. I-MP4 imiselwe ukuba ibe yi-H.264 (uxhaso lokudlala olubanzi kakhulu); i-MKV imiselwe ukuba ibe yi-H.265 yefayili encinci nge-~50% kwinqanaba elinye lomgangatho; i-WebM imiselwe ukuba ibe yi-VP9 okanye i-AV1 (ukusasazwa kwe-web ngaphandle kwe-royalty). Ungacima ukhetho lwe-codec kwizinto ezinokukhethwa ziphambili phambi kokuba i-FLV iqhube ukuguqulwa.

Ingaba umculo wam wesandi uya kuhlala uphila MP4 ukuya ku FLV?

Ewe - isandi siphinda sixutywe xa MP4 ne FLV zibelana nge-codec yesandi, okanye ziphinde zixutywe kwi-AAC / Opus / Vorbis kuxhomekeke ekubeni i FLV iqulethe ntoni. Isandi esininzi (iingxelo, iilwimi ezitshintshiweyo) sigcinwa kwiiqhoboshi ezixhasayo (MKV, WebM, MP4).

Ndingagcina i-framerate emiselweyo isuka kwi-MP4 ukuya kwi-FLV?

Ngokungagqibekanga i-framerate ayitshintshwanga (MP4 24fps ihlala i-24fps kwi FLV). Ukuba ufuna ukuyitshintsha (umzekelo, i-interlaced 29.97 ukuya kwi-progressive 30fps) ukhetho lwe-framerate luphatha 3:2 ukutsala ezantsi nokungaqwalaselwa kwe-interlacing kwindlela efanayo — akukho sibini sokukhupha ikhowudi esifunekayo.

Yintoni ubungakanani befayili obuhlukileyo phakathi kwe MP4 ne FLV?

I-codec efanayo ephinda-i-muxes (H.264 zombini MP4 ne FLV) ivelisa ubungakanani obufanayo. Iinguqu ze-codec zingatshintsha izinto ngokumangalisayo: H.264 -> H.265 ihlala iquka ifayile kwinqanaba elifanayo lomgangatho wokubona; H.264 -> VP9 ilingana ngokufanayo; AV1 ngoku incinci kakhulu ngexabiso lexesha elicocekileyo lokukopela.

Ingaba ifayili FLV iyadlala kwi-iPhone / Android / Smart TV?

MP4 / H.264 idlala naphi na ngokusemthethweni. MOV / H.264 idlala kwizixhobo ze-Apple kunye ne-Smart TVs ezininzi kodwa hayi kwi-Android edala. MKV ifuna i-VLC kwi-iOS. I-WebM idlala kwi-browser kodwa hayi kwi-Smart TV apps ezininzi. I-"isixhobo sokuhambelana" esimiselweyo kwiinketho eziphambili ikhetha i-codec / i-container ekhuselekileyo yenjongo yakho.

Ithatha ixesha elingakanani ukutshintsha ifayili ye-1-iyure MP4 ibe yi FLV?

Ixhomekeke kutshintsho lwe-codec. I-codec efanayo yoku-multiplex: imizuzwana engama-30-60 (akukho kuphinda-kukhowude). Khuphela kwakhona kwi-codec eyahlukileyo: ngokuqhelekileyo 0.3-0.7x ixesha lomthombo kwi-GPU yethu ye-pipeline, ngoko ke i-1-iyure MP4 -> FLV igqiba kwimizuzu engama-18-40; i-AV1 yoku-khowuda kwakhona ihamba 2-3x ngaphantsi.

Yintoni ubukhulu bomfanekiso oxhaswayo kwi MP4 ukuya kwi FLV?

I-HDR metadata (HDR10, Dolby Vision) igcinwa apho zombini MP4 ne FLV iziqulathi zeefayili kunye nee-codecs zixhasa khona; amacebo e-SDR ahlala e-SDR.

Ingaba i-MP4 yevidiyo yam ifihlakeleyo ngexesha lokuguqulwa kwe-FLV?

Ewe - iifayile zevidiyo ezilayishwe phezulu ziqhubekekiswa kubasebenzi ababekwe ngokuzimeleyo kwaye zicinywe kwimizuzu yokuphela. Akukho kuhlaziyo lomuntu, akukho kugcina ngaphezulu kwefestile ebhalwe phantsi. Bona /privacy/.

Ndingatywina okanye ndityhefe ngexesha lenyathelo MP4 ukuya ku-FLV?

Ayikumgangatho ofanayo — sebenzisa /video-trim/ okanye /video-cutter/ ukucima i MP4 kuqala, emva koko ufolo i MP4 -> FLV uguqulelo. Ukusika-ukuguqula-uguqulelo lukhawulezayo kune-ukubuyisela kwikhowudi ifayile yonke ukucima kuphela i-output.

Kutheni le nto ifayili FLV imnyama xa ithelekiswa nomboneleli MP4?

I-bitrate-too-low imiselwe rhoqo. Ukubuyisela i-encoding ye-bitrate ephezulu MP4 kwi-bitrate ephantsi FLV kwi-CRF emiselweyo icinezela imiboniso ene-motion-heavy kakhulu. Thobela i-CRF ezantsi kwi-16-18 (okanye misela i-bitrate ecacileyo ye-ceiling) kwaye uphinde uqhube ukubuyisela umgangatho.

Ingaba i-MP4 ukuya kwi-FLV iguqulela inkxaso yesihloko?

Ewe - iingoma zesihloko esingaphakathi (mov_text kwi-MP4, SRT / ASS kwi-MKV, WebVTT kwi-WebM) zigcinwa xa zombini i MP4 ne FLV iziqulathi zixhasa. Isihloko esitywiniweyo (i-hardsub) sidluliswa ngokuzenzekelayo kuba ziyinxalenye ye-pixel data.