Mataki na 1: Loda naka WebM 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 HLS fayiloli
WebM zuwa HLS Tambayoyin da ake yawan yi game da Canzawa
Ta yaya zan sake encode WebM zuwa HLS ba tare da rasa ingancin bidiyo ba?
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Ka saukar da fayil ɗinka WebM kuma mai canzawa zai yi aiki da wani CRF-da aka gina kan sake-sauya-kodi mai nufin fitarwa mai gani-ba-da-hasara HLS (CRF 18 bisa diff, ƙananan kimar = fitaccen fayil / mafi kyawun inganci). An zaɓi codec don ya haɗu da HLS ƙofar — H.264 don MP4 mai girma, H.265 don MKV mai girma, VP9 ga WebM, AV1 ga sabon pipes. WebM an yi shi da nufin ya zama mai ƙunci: VP8 ko VP9 bidiyo (AV1 da aka fi amfani da shi a baya) tare da Vorbis ko Opus sauti, da kuma komai na daban. A HLS stream is a.m3u8 manifest pointing at a staircase of H.264 or HEVC segments at several bitrates, so the player can switch quality mid-playback.
Shin HLS wani mai riƙewa ne ko kuma codec, kuma shin wannan zai canza abin da zan samu?
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@ action
Wanne codec na bidiyo ne fitarwa HLS take amfani dashi?
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Yana dogara ga kwandon HLS. 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. HLS shine Apple's HTTP Live Streaming - ba fayil ba amma playlist tare da fayil na ɓangarorin kafofin watsa labarun.
Shin za'a iya canza waƙoƙina na sauti daga WebM zuwa HLS?
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Yanzu. Idan WebM da HLS 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 HLS 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 WebM zuwa HLS?
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A matsayin diff, na'am — 24fps WebM zai zauna 24fps a cikin HLS; 60fps WebM 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 WebM zuwa HLS?
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Re-mux na codec-daidai (WebM H.264 → HLS 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 HLS 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 HLS codec / kwandon don manufarka. HLS ya dace da bandwidth na mai kallo a cikin lokaci na gaskiya kuma shine kawai format na streaming Safari da iOS goyon baya na asali. HLS ba fayil ne mai saukewa guda ba - don a kiyaye shi ba da sadarwa dole ne a mushe shi zuwa cikin wani kwandon da'ira farko.
Menene lokacin da za'a yi wa canja bidiyo mai awa 1 zuwa WebM zuwa HLS?
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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 WebM → HLS ya ƙare cikin minti 18-40 dangane da daidaita da manufar codec.
Mene ne mafi girman ma'aunin rarraba da ake goyon baya ga WebM zuwa HLS?
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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 WebM and HLS containers support it.
Shin WebM bidiyo na na sirri ne yayin canjawa zuwa HLS?
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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.
Ba a cikin mataki guda ba - amfani da /video-trim/ ko /video-cutter/ don a kwance farko, sa'an nan kuma a gudanar da WebM → HLS canji. Kashe-kashe da canja shi ne mafi sauri fiye da sake-saukar da duk WebM kawai don a rufe bidiyo da ba'a amfani da shi ba.
Me ya sa fayil HLS ya yi duhu idan aka kwatanta da wurin asali WebM?
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Kafin kowace lokaci, wani tsari ne na bitrate-too-low. Sake-saukar da lissafi daga WebM mai tsananin bitrate zuwa HLS na CRF na diff yana da matukar tashe a kan hotunan da suke da yawa na motsi. Ka saukar da CRF zuwa 16-18, ko ka sanya wani bitrate na manufa mai bayyananne wanda ya dace da ma'anar WebM, kuma HLS zai sake samun haskensa. WebM yana wasa a cikin kowane mai bincike na yau da kullum ba tare da wata ƙara ba, ba tare da wata kudin lasisi ba, kuma ba tare da wata bayyanar patent ba, wanda ke sa shi ya zama diff ga bidiyo mai shigar da yanar gizo.
HLS (HTTP Live Streaming) ƙa'idar yawo ce ta Apple don sadar da abun ciki na sauti da bidiyo akan intanet. Yana ba da yawo mai daidaitawa don ingantaccen aikin sake kunnawa.
