MOV ku AV1 Mafunso Ofunsidwa Kawirikawiri Okhudza Kusintha kwa Anthu
Kodi ndingasinthire bwanji MOV kupita ku AV1 popanda kubwezeretsa kanema wa kanema?
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Ngati ma kontena a MOV ndi AV1 angagwiritse ntchito codec yomweyo (H.264, H.265, VP9, AV1), wosintha amabwerera ku remuxer: ma streams oyamba amakopedwa ndi byte-by-byte ku AV1 kontena ndipo amasintha kokha. Remux ya 1 GB MOV ku AV1 nthawi zambiri imatha m'masekondi a 5-15 ndi kuwonongeka kwabwino. A MOV nthawi zambiri amatenga H.264 kapena HEVC kwa kutumiza, kapena ProRes pamene ndi kusintha mtsogoleri, limodzi ndi AAC kapena uncompressed PCM audio. AV1 ndi codec, si kontena - bitstream nthawi zambiri amayenda m'ma MP4 kapena WebM, kugwirizana ndi Opus kapena AAC audio.
Kodi AV1 idzasewera mu browser pamene MOV siyidzachita?
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Ndikofunika, ndipo nthawi zambiri ndichifukwa cha kusintha. A MOV wophatikizidwa mu tsamba la webusaiti amasonyeza wosewera wowonongeka kapena kutsitsa, chifukwa masamba a browsers samapereka decoder kwa iye. AV1 amasewera m'masamba mwanjira ya HTML5 video element popanda plugin ndi pulogalamu yakunja. AV1 amabweretsa pafupifupi 30% yabwino kusamvana kuposa H.264 pa ubwino wofanana ndi kunyamula palibe ndalama latsopano, chifukwa chake YouTube ndi Netflix kunyamula izo.
Kodi AV1 idzasewera bwino pafoni kapena pa TV?
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Sichingakhale choncho. MOV imasinthidwa ndi silicon yoperekedwa pafoni, ma tablet ndi ma TV, chifukwa chake imasewera popanda kutulutsa batri. AV1 nthawi zambiri imabwerera ku decoding ya mapulogalamu pa hardware yomweyo - kulemera kwa CPU, chipangizo chotentha, ndi ma frame osunthika pa 4K. Kwa chipangizo chofunikira, MOV ndi chotetezeka chokhalamo. Kodi AV1 ndi yochepa, ndipo decoders ya hardware idawonekera pafoni ndi TV kuyambira 2020 mpaka pano - zida zakale zimabwerera ku decoding ya software yokhala ndi mphamvu.
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 ma audio ambiri adzapulumuka kusinthidwa kwa MOV kupita ku AV1?
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Ndikoyenera - zonse zolemba za audio mu MOV (kuwunika kwa woyang'anira, mabungwe osiyanasiyana, mawu ofotokoza) amasungidwa mu AV1 pamene chikwama chofunikira chimathandizira ma audio ambiri. MKV ndi MOV amayendetsa ma audio osatha; MP4 amathandizira ambiri koma ena osewera a hardware amawona kokha track 1; WebM imatha pa Opus / Vorbis track. AV1 ndi royalty-free video codec Alliance for Open Media anatulutsa mu 2018 monga wotsatira wa VP9.
Kodi ma subtitle amasunga zosunga pamene MOV amasinthidwa kuti AV1?
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Ma subtitle olimba (ma tracks osankhika) amapulumuka pamene AV1 angawagwiritse ntchito: MKV amagwiritsa ntchito SRT, ASS, SSA, PGS, VobSub mwachilengedwe; MP4 amagwiritsa ntchito mov_text (format yosasinthasintha). Kusintha MKV ndi subs a ASS ku MP4 kumawawononga kuti akhale mov_text kapena kuwalemba. Hardsubs (olembana mu kanema) amagwiritsa ntchito ngakhale.
Kodi MOV mpaka AV1 amasunga masamba olemba / kuyendera kwa DVD?
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Metadata ya bokosi limasintha pakati pa MOV ndi AV1 pamenepo onse awiri amapereka bokosi la atomu (MKV, MP4, MOV). WebM imasunga bokosi m'ma block ogwirizana ndi Matroska, choncho MKV <-> WebM bokosi limayenda molimba. AVI sichimakhala ndi bokosi la spec, choncho kusintha kwa AVI ku AV1 kumabweretsa fayilo yosasinthika ngati simuwonjezera ma markers m'manja.
Kodi ndi chiyani za MKV zowonjezera (fonti, kusindikiza) pamene mukupita MOV ku AV1?
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MKV ndi yokha mainstream yokhala ndi ma fayilo ophatikizidwa (TTF fonts for ASS subs, JPG cover art, fan-translated PDF inserts). Kuchokera ku MOV kupita ku AV1 kumachotsa ma attachments pamene AV1 si MKV - ma streams elementary amasinthidwa, koma payload ophatikizidwa amakhala m'malo ochokera. Tengani MOV ngati chitetezo ngati mumatengera ma fonts ophatikizidwa.
Kodi codec yomwe AV1 imagwiritsa ntchito ndi yosasinthika?
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Kodiyi ya default imasankhidwa kuti igwirizane ndi AV1 yokhala ndi katundu: MKV imasinthidwa kukhala H.265 (HEVC) kuti ikhale yolimba kwambiri; MP4 imasinthidwa kukhala H.264 kuti ikhale yolimba kwambiri; WebM imasinthidwa kukhala VP9; AVI imagwiritsa ntchito MPEG-4 ASP (DivX / Xvid linage).
Kodi HDR (HDR10, Dolby Vision) imatha bwanji MOV mpaka AV1?
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HDR static metadata (HDR10 mastering display values, max content light level) imatha kupita ku AV1 pamene ma kontena awiri ndi codec osankhidwa amathandizira (HEVC, AV1 mu MKV / MP4). Dolby Vision ndi wolimba kwambiri - DV profile 5 / 7 / 8.1 mu MOV nthawi zambiri amapulumuka okha ku MKV ndi HEVC; kusinthidwa ku AV1 kontena lomwe silitha kunyamula gawo la DV limatha ku HDR10.
Kodi wosinthira MOV mpaka AV1 adzasunga kusinthasintha kwa framerate (VFR)?
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MKV ndi WebM amalemba ma timestamps a real-frame ndi kuwongolera VFR mwanjira yachibadwa, kotero kuti MOV VFR imatha kukhala ndi AV1 ya mafomuwa popanda kubwezeretsa. MP4 imasunga nthawi yowonjezerapo koma ena osewera amaganiza kuti CFR; wosintha amatulutsa "kulepheretsa CFR" kuti abwezeretse VFR MOV ku 24 / 30 / 60 fps AV1 kwa zolinga zosatheka.
Remux ya codec yomweyo imatulutsa kukula kwakukulu (kuphatikiza kwa kontena kumasiyana ndi 0.1-2%). Kusintha kwa codec kungapangitse kukula kwa 50% kapena kuposa: H.264 kupita ku H.265 kumatha kuchepetsa fayilo pazomwe zimawoneka bwino; H.264 kupita ku AV1 kumatha kuchepetsanso panthawi ya slow.Kuchokera ku high-bitrate MOV (Blu-ray rip) kupita ku low-bitrate AV1 (kutsitsa pa intaneti) ndichifukwa chofala kwambiri cha kugwa kwakukulu.
