Fragmented MP4のおはなし

Streaming Conference #2で発表したスライドです。
https://streaming-lab.connpass.com/event/79586/

Transcript

1. 'SBHNFOUFE.1ͷ͓͸ͳ͠
   4USFBNJOH$POGFSFODF
   1SFTFOUFECZ!NFUFPS@TBBO
   

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2. ࣗݾ঺հ
   w ϝςΦ !NFUFPS@TBBO
   
   w ෱ԬʹॅΜͰ͍Δେֶ೥ੜ
   w ઐ໳͸ࣗવݴޠॲཧ
   w ࠷ۙͷझຯ͸6%1ͷύέοτଛࣦ࣌ͷϦΧόʔʹؔ͢Δݚڀ
   w ๭ࣾͰϥΠϒ഑৴ج൫ͷߏஙʹؔΘ͍ͬͯͨ
   

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3. -JWF4USFBNJOH'PSNBU
   

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4. -JWF4USFBNJOH'PSNBU
   w 35.1
   w 435
   w )551-JWF4USFBNJOH
   w .1&(%"4)
   w 8FC35$
   

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5. -JWF4USFBNJOH'PSNBU
   w 35.1
   w 435
   w )551-JWF4USFBNJOH
   w .1&(%"4)
   w 8FC35$
   

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6. )551-JWF4USFBNJOH
   w "QQMF͕։ൃɻ
   w 3'$ͱͯ͠ඪ४Խɻ
   w NVϓϨΠϦετΛ࢖ͬͯ഑৴ɻ
   w .1&(54'SBHNFOUFE.1
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7. w .1&(-"͕։ൃɻ
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   w 'SBHNFOUFE.1 .1&(54
   
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8. IMTKT͕ͻͨ͢Βॏ͍໰୊
   

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9. IMTKT
   w )-4͸جຊతʹ4BGBSJͳͲɺݶΒΕͨϒϥ΢βͰ͔͠࠶ੜग़དྷͳ͍ɻ
   w ͦͷͨΊɺඇରԠϒϥ΢βΛαϙʔτ͢ΔͨΊʹ͸IMTKTͱݺ͹ΕΔ
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   w ΄͔ʹ΋WJEFPKTDPOUSJCIMTͳͲ΋͋Δ͕ɺݱࡏओྲྀͳͷ͸IMTKTɻ
   

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10. UTEFNVYFSKT
    w NVΛऔಘ
    w 54ϑΝΠϧΛऔಘ
    w 54ϑΝΠϧ͔Βө૾ͱԻ੠ΛऔΓग़͢
    w औΓग़ͨ͠σʔλΛ*40#.''ʹม׵͢Δ
    w .FEJB4PVSDF&YUFOTJPOΛ࢖ͬͯ࠶ੜ͢Δ
    

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11. UTEFNVYFSKT
    w NVΛऔಘ
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    w औΓग़ͨ͠σʔλΛ*40#.''ʹม׵͢Δ
    w .FEJB4PVSDF&YUFOTJPOΛ࢖ͬͯ࠶ੜ͢Δ
    

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12. UTEFNVYFSKT
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13. UTEFNVYFSKT
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14. UTEFNVYFSKT
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15. UTEFNVYFSKT
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16. UTEFNVYFSKT
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17. UTEFNVYFSKT
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18. UTEFNVYFSKT
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19. UTEFNVYFSKT
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20. UTEFNVYFSKT
    
    

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21. 'SBHNFOUFE.1
    

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22. 'SBHNFOUFE.1
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23. 'SBHNFOUFE.1
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24. 'SBHNFOUFE.1
    w GUZQGJMFUZQF
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25. 'SBHNFOUFE.1
    w )-4ͷ৔߹ɺ&9597&34*0/͔
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    #EXT-X-MEDIA-SEQUENCE:0
    #EXT-X-MAP:URI=“init.mp4"
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    segment1.mp4
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    segment2.mp4
    

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26. 'SBHNFOUFE.1
    w .1&(%"4)ͷ৔߹͸ݩʑαϙʔτ
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    minBufferTime="PT1.500S" type="static"
    mediaPresentationDuration="PT0H9M56.466S"
    maxSegmentDuration="PT0H0M4.000S"
    profiles="urn:mpeg:dash:profile:full:2011">
    
    ./output.mpd
    
    
    maxHeight="180" maxFrameRate="30" par="16:9" lang="und">
    
    
    codecs="avc3.640014,mp4a.40.2" width="320" height="180"
    frameRate="30" sar="1:1" audioSamplingRate="48000"
    startWithSAP="1" bandwidth="631708">
    
    
    
    
    
    
    
    
    
    
    

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27. 'SBHNFOUFE.1
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    IUUQTCMPHTBLBNBJDPNKQDNBGDNBGMPXMBMBUFODZMJWFIUNMΑΓ
    

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28. .FEJB4PVSDF&YUFOTJPOT
    w )551μ΢ϯϩʔυΛར༻ͯ͠ετϦʔϛϯά࠶ੜΛߦ͏ͨΊʹ8$ʹΑͬ
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    w ॳظԽʹඞཁͳϔομ৘ใؚ͕·Ε͍ͯΔॳظԽηάϝϯτͱ୹͍࣌ؒͰ
    ۠੾ΒΕͨϝσΟΞσʔλຊମؚ͕·ΕΔϝσΟΞηάϝϯτ͕ඞཁ
    w ͭ·Γɺ'SBHNFOUFE.1͸શͯຬ͍ͨͯ͠ΔͨΊɺͦͷ··࠶ੜ͢Δ
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29. .FEJB4PVSDF&YUFOTJPOT
    w +BWB4DSJQUͷϥΠϒϥϦEBTIKT΍IMTKTΛ࢖͏͜ͱʹΑΓɺࣗલͰ࣮૷ͤ
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30. $."'
    

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31. $PNNPO.FEJB"QQMJDBUJPO'PSNBU
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32. $PNNPO.FEJB"QQMJDBUJPO'PSNBU
    w $."'Ͱ͸)551ͷ$IVOLFE5SBOTGFS&ODPEJOHΛ࢖͏
    w ηάϝϯτϑΝΠϧ͕Τϯίʔμ͔Βશͯૹ৴͞ΕΔલʹɺνϟϯΫΛΫ
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33. $PNNPO.FEJB"QQMJDBUJPO'PSNBU
    w $."'Ͱ͸)551ͷ$IVOLFE5SBOTGFS
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    w ηάϝϯτϑΝΠϧΛߋʹ෼ׂͨ͠΋ͷΛνϟ
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34. $PNNPO.FEJB"QQMJDBUJPO'PSNBU
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35. ͓·͚
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36. ͓͠·͍
    

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