DMM.com LLC supports Japanese Streaming Community

by Futa Ogawa

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DMM.com LLC supports Japanese Streaming Community Futa Ogawa, DMM.com

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•1995೥ੜ·Εͷ23ࡀ •޷͖ͳςΫϊϩδʔ •JavaScript (Virtual DOM) •Firebase •CDN •HLS •Streaming ConferenceͷӡӦ DMM.comάϧʔϓ ձ௕ࣨʗ NEWPEACE Inc. ڞಉ૑ۀऀɾςΫχΧϧσΟϨΫλʔ খ઒෨ଠ

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Streaming Conference Overview • From February 2018 • Slack members: 95+ • Total event participants: 360+ • Total hashtag Tweets: 460+

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!ϥΠϒετϦʔϛϯάͷ஌ݟ ฉ͖͍͚ͨͲɺͳ͔ͳ͔ͳ͍ͳ͊

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ͱ͍͏ྲྀΕͰ࢝·Γ·ͨ͠

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DMMͷਓͰ͕͢ ͓࢓ࣄͰ͸ಈը΍ͬͯ·ͤΜ झຯͰ͢

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࠷ۙͷ͓࢓ࣄɿ Ϧαʔνϟʔ ͱ৽نࣄۀͷ४උ

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Apple WWDC 2018 ߦ͖ͬͯ·ͨ͠ʂ

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Labs @ Apple WWDC 2018

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WWDCͷ஌ݟΛڞ༗ͭͭ͠ ܰ͘એ఻͍ͤͯͩ͘͞͞

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⚠ Safariݶఆͷ৔߹͕͋Γ·͢

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Q1: Appleܥ΁ͷରԠ͸fMP4ૂ͓͚ͬͯ͹ྑ͞ ͦ͏ʁ

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A1: fMP4ʹରԠ͢Ε͹OK! MPEG-2 TSΛαϙʔτ͠ͳ͘ͳΔ͜ͱ͸ͳ͍͕ɺ৽ػೳʢྫɿ4Kʣ͸fMP4ʹ͔͠ରԠ͠ͳ͍৔߹΋͋Δ

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Q2: fMP4ରԠͯ͠ͳ͍iOS9Λ੾Γ͍ͨͷͰ͕͢ɺ iOS9͕͍ͭࢮʹ·͔͢ʁ

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A2: iOS 9͸طʹαϙʔτऴ͍ྃͯ͠Δɻ

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Q3: ηάϝϯτϑΝΠϧͷಈըϑϨʔϜͷઌ಄͕IϑϨʔϜͰ͸ແ͍৔ ߹ɺHLSͷΞμϓςΟϒετϦʔϜͷը࣭มߋΛߦ͏͜ͱ͸Apple ੡඼Ͱ͸Մೳʁ

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LT 4ͷ @saturday06 ͞Μ͔Βͷ࣭໰Ͱ͢

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Ή͔͍ͣ͠

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ී௨ͷηάϝϯτ 01.ts 02.ts 03.ts 04.ts Segment ɾɾɾ

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ී௨ͷηάϝϯτ 01.ts 02.ts 03.ts 04.ts I Frame Segment ɾɾɾ

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ηάϝϯτͷத৺ʹI Frame 01.ts 02.ts 03.ts 04.ts I Frame Segment ɾɾɾ

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ηάϝϯτͷத৺ʹI Frame 01.ts 02.ts 03.ts 04.ts I Frame Segment ͜ͷλΠϛϯάͰ੾Γସ͑Ͱ͖Δʁ ɾɾɾ

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A3: ࢓༷ͱͯ͠͸ՄೳɻγʔΫʢϥϯμϜΞΫηεʣ ͨ͠৔߹͸ɺ௚લͷηάϝϯτ͕ඞཁʹͳΔɻ ηάϝϯτͷத৺ΛIϑϨʔϜʹ͢Δ͜ͱͰ10%΄ͲηάϝϯτϑΝΠϧ༰ྔΛ࡟ݮՄೳͳͷͰํ๏࿦ͱͯ͋͠Γ More: https://developer.apple.com/library/archive/documentation/General/Reference/HLSAuthoringSpec/Requirements.html

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ී௨ͷηάϝϯτ 01.ts 02.ts 03.ts 04.ts I Frame Segment ɾɾɾ 01.tsͷ I Frameͷ Өڹൣғ

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ηάϝϯτͷத৺ʹI Frame 01.ts 02.ts 03.ts 04.ts I Frame Segment ɾɾɾ 01.tsͷ I Frameͷ Өڹൣғ

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ηάϝϯτͷத৺ʹI Frame 01.ts 02.ts 03.ts 04.ts I Frame Segment ͜ͷλΠϛϯάͰ੾Γସ͑Ͱ͖Δ͕ɺ01.tsͱ02.ts͕ඞཁʹͳΔ ɾɾɾ 01.tsͷ I Frameͷ Өڹൣғ

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Q4: Redundant Stream͸ηάϝϯτಉظͯ͠ ͳͯ͘΋Α͍ʁ

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Redundant Streamͱ͸

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#EXTM3U #EXT-X-STREAM-INF:PROGRAM-ID=1, BANDWIDTH=200000, RESOLUTION=720x480 http://ALPHA.mycompany.com/lo/prog_index.m3u8 #EXT-X-STREAM-INF:PROGRAM-ID=1, BANDWIDTH=200000, RESOLUTION=720x480 http://BETA.mycompany.com/lo/prog_index.m3u8 #EXT-X-STREAM-INF:PROGRAM-ID=1, BANDWIDTH=500000, RESOLUTION=1920x1080 http://ALPHA.mycompany.com/md/prog_index.m3u8 #EXT-X-STREAM-INF:PROGRAM-ID=1, BANDWIDTH=500000, RESOLUTION=1920x1080 http://BETA.mycompany.com/md/prog_index.m3u8

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A4: ಉظͯ͠ͳͯ͘OKɻී௨ͷϚϧνϏοτ Ϩʔτͱಉ͡ɻ Timestamp͚ͩΛج४ͱͯ͠ಡΈࠐΉͷͰɺ2ͭͷετϦʔϜͰϥά͕͋ͬͨ৔߹͸ר͖໭ΓͳͲ͕ى͜ΔՄೳੑ͕͋Δ

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Q5: CMAF͔൱͔͸ͱ΋͔͘ɺ௿஗ԆHLS͸Ͳ ͏͢Δ༧ఆʁ

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A5: ͍·৭ʑͳ΍ΓํΛߟ͍͑ͯΔ͚ΕͲɺ ·ͩݴ͑ͳ͍ɻ

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Q6: VP9Λ͍ͭαϙʔτ͢Δ͔ɺ·ͨAV1΁Ͳ ͷ͘Β͍ੵۃతʹؔΘ͍ͬͯ͘ͷ͔ʁ

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A6: VP9͸αϙʔτ͠ͳ͍ͩΖ͏ɻ AV1ʹ͍ͭͯ͸ൿີ

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Summary

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Summary: DMM͸͍͍ͧ

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Summary: DMM͸͍͍ͧ Apple͸HLSʹ΋ܧଓతʹ౤ࢿͯͦ͠͏

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Japanese Streaming Community͔Β࣭໰͕ ͋Ε͹౴͑ΔΑʂ by Apple AV Engineer ࿈བྷઌΛ஌Γ͍ͨํ͸࠙਌ձͰ͓੠͕͚͍ͩ͘͞

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DMMͰ͸ಈըܥΤϯδχΞͷ ࠾༻΋ੵۃతʹߦͳ͓ͬͯΓ·͢ʂ ͝ڵຯͷ͋Δํ͸࠙਌ձͰ͓੠͕͚͍ͩ͘͞