MP4 → HLS

Sinthani Yanu MP4 ku HLS mafayilo mosavuta

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Kukweza

Momwe mungasinthire MP4 ku HLS

Gawo 1: Kwezani yanu MP4 mafayilo pogwiritsa ntchito batani lomwe lili pamwambapa kapena pokoka ndi kugwetsa.

Gawo 2: Dinani batani la 'Convert' kuti muyambe kusintha.

Gawo 3: Tsitsani pulogalamu yanu yosinthidwa HLS mafayilo

MP4 ku HLS Mafunso Ofunsidwa Kawirikawiri Okhudza Kusintha kwa Anthu

Kodi ndingasinthire bwanji MP4 kupita ku HLS popanda kuwononga mtundu wa kanema?

Ikani fayilo yanu ya MP4 ndipo wosinthira amayendetsa CRF-based re-encode yoyang'anira kutulutsa kwa HLS (CRF 18 mosalekeza, matanthauzo ochepa = fayilo yayikulu / yapamwamba). Codec imasankhidwa kuti igwirizane ndi HLS kontena - H.264 kwa MP4 yokhala ndi kukula kwakukulu, H.265 kwa MKV yokhala ndi kukula kwakukulu, VP9 kwa WebM, AV1 kwa ma pipelines atsopano. Zikuoneka kuti pafupifupi aliyense MP4 m'munda ndi H.264 kanema ndi AAC audio; chidebenso mwalamulo ali HEVC, AV1 ndi VP9. Mtsinje wa HLS ndi.m3u8 manifest womwe umasonyeza mzere wa H.264 kapena HEVC pa ma bitrates angapo, kuti wosewera akhoza kusintha mtundu pakati pa kusewera.

Kodi HLS angagwiritse ntchito nyimbo zambiri kuposa imodzi?

Ndikoyenera, ndipo ndi chithandizo choyenera pa MP4. HLS imachita chilichonse cha audio monga chida chabwino kwambiri, choncho mgwirizano wachilankhulo chachikhalidwe, dub ndi woyang'anira woyang'anira amatha kukhala m'fayilo imodzi ndi wosewera yemwe amasintha pakati pawo pazosowa. HLS imasintha ku bandwidth ya woyang'anira nthawi yoyenera ndipo ndi yokhayo yokhala ndi mtundu wa Safari ndi iOS yothandizira.

Kodi HLS ndi chonyamula kapena codec, ndipo kodi izi zimasintha zomwe ndimapeza?

Izi amasintha zimene kuyembekezera kuchokera kutuluka wapamwamba. Mmodzi wa mbali ya izi kusintha dzina encoding kuposa wrapper, kotero zimene zimabweranso ndi kuti bitstream m'matumba ameneyo amafuna bwino — nthawi zambiri MP4 kapena MKV. Kuwonjezeka kusonyeza m'matumba; codec ndi zimene inali kuika kukula kwa fayilo ndi kumene izo adzasewera.

Kodi ndi codec iti ya kanema yomwe HLS imagwiritsa ntchito?

Izi zimadalira pa HLS kontena. MP4 defaults kuti H.264 kwa kusewera kwamphamvu kwambiri pafoni, masamba, ndi Smart TVs. MKV defaults kuti H.265 / HEVC kwa pafupifupi theka la kukula kwa fayilo pa quality yofanana. WebM defaults kuti VP9. Zosankha zazikulu zimasonyeza kusankha kodek ngati mukufuna kuchotsa. HLS ndi HTTP Live Streaming ya Apple - si fayilo koma playlist komanso fayilo ya ma segments a media afupi.

Kodi nyimbo yanga ya audio idzapulumuka kusinthidwa kwa MP4 kupita ku HLS?

Ndiko. Ngati MP4 ndi HLS amagwiritsa ntchito codec ya audio (mwachitsanzo, onse amagwiritsa ntchito AAC), audio imasinthidwanso popanda kusinthidwanso - bit-identical. Ngati codecs ndi osiyana, audio imasinthidwanso kukhala AAC / Opus / Vorbis malinga ndi zomwe HLS zimathandizira. Audio yokhala ndi ma track ambiri (mawu ofotokoza, mabungwe osiyanasiyana) imasungidwa.

Kodi ndingapeze bwanji mitengo yazithunzi yoyamba pamene ndisintha MP4 kupita ku HLS?

Mwa default yeah - 24fps MP4 imakhala 24fps mu HLS; 60fps MP4 imakhala 60fps. Ngati mukufuna kusintha kuchuluka (mwachitsanzo, kulumikizana 29.97 → kupitilira 30, kapena 60 → 30 kwa kutsitsa), kusankha kwa framerate kumatha kuwongolera 3: 2 kutsitsa, kuchotsa, ndi kuphatikizira ma frame mu gawo limodzi lokha la encoding.

Kodi kukula kwa fayilo idzasintha bwanji kuchokera ku MP4 kupita ku HLS?

Kodikodi yofananayo imasintha (MP4 H.264 → HLS H.264 yomwe isintha kontena): kukula kwake kuli pafupifupi chimodzimodzi. Kusintha kwa codec kungayambitse kusinthika kwambiri: H.264 → H.265 nthawi zambiri kumadula fayiloyo panthawi yomweyo; VP9 ndi yofanana; AV1 imadula 20-30% koma ndi yocheperako.

Kodi fayilo ya HLS idzasewera pa iPhone, Android, ndi Smart TVs?

MP4 / H.264 imasewera mosalekeza pazogwiritsa ntchito zonse zamakono. MOV / H.264 imasewera pazogwiritsa ntchito za Apple ndi ma TV ambiri koma si nthawi zonse pa Android oyambirira. MKV iyenera VLC pa iOS. WebM ndi msakatuli woyamba. Zosankha zopitilira muyeso zimaphatikizapo "kugwirizana kwa chipangizo" choyamba chomwe chimasankha chotetezeka kwambiri HLS codec / chidebe chazofunikira zanu. HLS si fayilo yotsitsa imodzi - kuti ikhale yosagwirizana, iyenera kusinthidwanso kudzera mu chonyamula choyenera.

Kodi ndi nthawi yayitali bwanji kusinthira kanema wa 1-hour MP4 kuti HLS?

Kusintha kwa codec yomweyo ndi nthawi ya 30 mpaka 60 kwa fayilo ya 1-hour. Kodidi yokhala ndi codec imagwira ntchito panthawi ya 0.3-0.7x yochokera pa GPU yathu, kotero kuti 1-hour MP4 → HLS imatha m'maola 18-40 malinga ndi resolution ndi codec yoyenera.

Kodi ndi chiyani chokwanira chothandizira kwa MP4 mpaka HLS?

Kufika pa 8K (7680 × 4320) pa maphunziro a Premium. Kusintha kwaulere kumatha ku 4K (3840 × 2160) pogwiritsa ntchito kukula kwa fayilo. HDR metadata (HDR10, HDR10 +, Dolby Vision pamene pali) imatha kuchitika pomwe ma containers a MP4 ndi HLS amathandizira.

Kodi MP4 kanema wanga ndi wapadera pamene akusintha kukhala HLS?

Yai. Uploaded video owona ndi kuchitidwa mu ogwira ntchito osiyana, nthawi zonse anaona ndi munthu, nthawi zonse indexed, ndi kuchotsa m'maola angapo ya kumaliza. retention zenera ndi zolemba pa / privacy / ndi ife kufalitsa palibe maphunziro corpus kuchokera kutsitsa wosuta.

Kodi ndingagwiritse ntchito, kuchotsa, kapena kuzungulira nthawi ya MP4 kupita ku HLS?

Sichingakhale panjira yomweyo - kugwiritsa ntchito / video-trim / kapena / video-cutter / kuti muchepetse koyamba, kenako kuyendetsa kusinthidwa kwa MP4 → HLS. Kusinthanitsa ndi kusinthidwa ndi kosavuta kuposa kubwezeretsa komaliza kwa MP4 kuti muchepetse zithunzi zosagwiritsa ntchito.

MP4

Mtundu wa chidebe cha MP4 ukhoza kusunga makanema, mawu, mawu omasulira, ndi zithunzi mu fayilo imodzi yokhala ndi kukanikiza kwabwino kwambiri.

HLS

HLS (HTTP Live Streaming) ndi njira yotsatsira yopangidwa ndi Apple popereka zomvera ndi makanema pa intaneti. Imakhala kukhamukira chosinthika kuti bwino kusewera ntchito.