Androidで動画編集アプリの技術選択

potatetips #43で発表させていただいた資料です。

Transcript

1. "OESPJEͰಈըฤूΞϓϦͷٕज़બ୒
   QPUBUPUJQT
   
2. ࣗݾ঺հ $
   $IBOOFMגࣜձࣾ
   "OESPJE
   &OHJOFFS
   ݉
   1.
   ਢాɹխ೭ .BTBZVLJ4VEB EBBTVV ʮ4PEBʯಈըฤूΞϓϦ
3. ຊ೔ͷྲྀΕ ᶃΞϓϦͷओཁػೳ
   ᶄͦΕͧΕͷػೳͷٕज़બ୒
   ᶅ࡞੒ͨ͠ϥΠϒϥϦ
4. J Τϯίʔυ ಈըฤूɾ࡞੒
   JJ ಈըࡱӨ
   ɹ
   *JJ ಈըϓϨϏϡʔ ಈը࠶ੜ ᶃΞϓϦͷओཁػೳ
5. ᶄͦΕͧΕͷػೳͷٕज़બ୒
    J Τϯίʔυ ಈըฤूɾ࡞੒  ˙''NQFH
   ɾͰ͖Δ͜ͱ͕๛෋ʢϑΟϧλʔɺಈը݁߹ɺը૾੾Γग़͠ɺ8.ɾɾɾʣ
   ɾυΩϡϝϯτɺ(PPHMFઌੜ৘ใ͕๛෋
   ɾϥΠηϯε͕ωοΫ
   ɾϋʔυ΢ΣΞσίʔμʔ͕ΦϯʹͳΒͳ͍ɻ
   ˙.FEJB$PEFD
   ˍ
   0QFO(-&4Ͱࣗ࡞
   ɾֶशίετɺ࣮૷ίετ͕ߴ͍
   ɾΧελϚΠζੑ͕ߴ͍ ϑΟϧλʔɺจࣈೖΕɺഒ଎ɾɾ
   ɾ''NQFHΑΓ΋֓Ͷ͘Β͍ૣ͘Ͱ͖Δ
   ɾ"1*Ҏ্͔Β4VSGBDFΛ௚઀౉ͤΔͷͰ࢖͍΍͍͢
   ˠ.FEJB$PEFD
   ˍ
   0QFO(-&4Ͱࣗ࡞͠·ͨ͠ɻ
6. ᶄͦΕͧΕͷػೳͷٕज़બ୒
    JJ ಈըࡱӨ ˙''NQFH
   ɾి஑ফඅ͕ܹ͍͠
   ɾϥΠηϯε͕ωοΫ
   ˙0QFO$7
   ɾإೝূͱ͔͍ͨ͠ͱ͖͸͍͍͔΋ EMJCͷ͕͍͍͔΋
   ɾͰ͖Δࣄ๛෋ʢϑΟϧλʔɺ෺ମೝࣝɺإೝࣝʣ
   ɾύϑΥʔϚϯε͕ɾɾɾ
   ˙.FEJB3FDPSEFS
   ɾ"OESPJE͕σϑΥϧτͰఏڙ͍ͯ͠Δˍ࣮૷Χϯλϯ
   ɾͰ͖Δࣄ͕ݶΒΕΔ
   ˙.FEJB$PEFD
   ˍ
   0QFO(-&4Ͱࣗ࡞
   ɾֶशίετɺ࣮૷ίετ͕ߴ͍
   ɾΧελϚΠζੑ͕ߴ͍ʢϓϨϏϡʔͱ࿥ը͍ͯ͠ΔಈըΛ෼͚ΕΔʣ
   ˠ.FEJB$PEFD
   ˍ
   0QFO(-&4Ͱࣗ࡞͠·ͨ͠ɻ
7. ᶄͦΕͧΕͷػೳͷٕज़બ୒
    JJJ ಈըϓϨϏϡʔ
    ˙.FEJB1MBZFS
   ɾ"OESPJE͕σϑΥϧτͰఏڙ͍ͯ͠Δˍ࣮૷Χϯλϯ
   ɾ୺຤΍όʔδϣϯݻ༗ͷόά͕ଟ͍
   ɾγʔΫ͕Αͣ͘ΕΔ
   ˙.FEJB$PEFD
   ˍ
   0QFO(-&4Ͱࣗ࡞
   ɾ࣮૷ίετ͕ߴ͍
   ɾΧελϚΠζੑ͕ߴ͍
   ˙&YP1MBZFS
   ɾ.FEJB&YUSBDUPS
   ˍ
   .FEJB$PEFDͰ࣮૷͞ΕͯΔ
   ɾഒ଎࠶ੜ͕"OESPJEҎ߱Ͱ࢖͑Δ
   ɾόά͕΄΅ແ͍ɻ͋ͬͯ΋मਖ਼͞Ε͍ͯ͘ɻ
   ˠ&YP1MBZFSΛબ୒͠·ͨ͠ɻ
8. ᶄͦΕͧΕͷػೳͷٕज़બ୒ɹ
   ࠔͬͨ఺ Τϯίʔυ͕஗͍
   ɹJ04ʹൺ΂ͯഒ͸͔͔ͬͯ͠·͏ɻ
   
   
   
   J1IPOFT
   WT
   (BMBYZ4
   FEHF
   ˠಈըϓϨϏϡʔதʹϑΟϧλʔ౳Λ ͔͚ɺฤू݁ՌΛ൓өͤ͞Δඞཁ͋Γ
9. ᶅ࡞੒ͨ͠ϥΠϒϥϦ &YP1MBZFS'JMUFS IUUQTHJUIVCDPN.BTBZVLJ4VEB&YP1MBZFS'JMUFS ˞ϓϧϦΫΤετେ׻ܴʂ0QFO(-4-΍4IBEFSಘҙͳํʂ
10. ᶅ࡞੒ͨ͠ϥΠϒϥϦ
    &YP1MBZFSʹϑΟϧλʔΛ͔͚Δ &YP1MBZFS
    (M4VSGBDF7JFX
    3FOEFSFS
    4VGBDF5FYUVSFΛ౉͢ ಈըΛσίʔυͯ͠
    4VSGBDF5FYUVSFʹ൓ө σίʔυͯ͘͠Εͨ
    4VSGBDF5FYUVSFʹ
    0QFO(-4-
    
    4IBEFSͰ
    ϑΟϧλʔΛ͔͚Δ
11. ᶅ࡞੒ͨ͠ϥΠϒϥϦ
    &YP1MBZFS'JMUFSͷ࢖͍ํᶃ
    4JNQMF&YP1MBZFSΛ࡞Δ BandwidthMeter bandwidthMeter = new DefaultBandwidthMeter(); TrackSelection.Factory videoTrackSelectionFactory = new AdaptiveTrackSelection.Factory(bandwidthMeter); TrackSelector trackSelector = new DefaultTrackSelector(videoTrackSelectionFactory); // Measures bandwidth during playback. Can be null if not required. DefaultBandwidthMeter defaultBandwidthMeter = new DefaultBandwidthMeter(); // Produces DataSource instances through which media data is loaded. DataSource.Factory dataSourceFactory = new DefaultDataSourceFactory(context, Util.getUserAgent(context, "yourApplicationName"), defaultBandwidthMeter); // Produces Extractor instances for parsing the media data. ExtractorsFactory extractorsFactory = new DefaultExtractorsFactory(); // This is the MediaSource representing the media to be played. MediaSource videoSource = new ExtractorMediaSource(Uri.parse(MP4_URL), dataSourceFactory, extractorsFactory, null, null); // SimpleExoPlayer player = ExoPlayerFactory.newSimpleInstance(context, trackSelector); // Prepare the player with the source. player.prepare(videoSource); player.setPlayWhenReady(true);
12. ePlayerView = new EPlayerView(context); // set SimpleExoPlayer ePlayerView.setSimpleExoPlayer(player); ePlayerView.setLayoutParams(new RelativeLayout.LayoutParams( ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)); // add ePlayerView to WrapperView ((MovieWrapperView) findViewById(R.id.layout_movie_wrapper)).addView(ePlayerView); ePlayerView.onResume(); ᶅ࡞੒ͨ͠ϥΠϒϥϦ
    &YP1MBZFS'JMUFSͷ࢖͍ํᶄ
    &1MBZFS7JFXΛ࡞੒͠ɺ4JNQMF&YP1MBZFSΛηοτ
13. ePlayerView.setGlFilter(new GlSepiaFilter()); ᶅ࡞੒ͨ͠ϥΠϒϥϦ
    &YP1MBZFS'JMUFSͷ࢖͍ํᶃ
    &1MBZFS7JFXʹ'JMUFSΛηοτ
14. ·ͱΊ ɾ.FEJB$PEFD
    ˍ
    0QFO(-&4͸ֶशίετɺ࣮૷ίετ͕
    ɹߴ͍͕ɺಈըฤूʹؔ͢Δػೳ͸Ұ௨Γ཈͑ΒΕΔɻ
    ɾ࣮૷ͷࢀߟʹͳΔϥΠϒϥϦʔ͸͋Δ͕ɺόά͕ଟ͔ͬͨΓ
    ɹػೳ͕খ͔ͬͨ͞Γ͢ΔͷͰࣗ࡞͢Δͷ͕ݱঢ়ͷղܾࡦɻ
15. .FEJB$PEFDͰࢀߟʹͳΔϦϯΫ "OESPJE
    .FEJB$PEFD
    TUV⒎
    IUUQCJHqBLFDPNNFEJBDPEFD
    ंྠͷ࠶ൃݟΈ͍ͨͳʁ
    IUUQTFSFOFHJBOUDPNCMPH DBU
    "OESPJEͰ.FEJB$PEFDΛ࢖͍''NQFHͳ͠ͰಈըΛ
    ѹॖ͢Δํ๏ʢϥΠϒϥϦ͋Γʣ
    IUUQRJJUBDPNZVZB@QSFTUPJUFNTEFDCE
    "OESPJEͷ.FEJB$PEFDͱ.FEJB&YUSBDUPS͋ͨΓͰಈըͷ
    ϑϨʔϜεΩοϓͳͲΛͯ͠ΈΔ
    IUUQRJJUBDPNNFDIBNPHFSBJUFNTEGF
16. ͝੩ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ ˞$
    $IBOOFMͰ͸
    J04ɺαʔόʔαΠυ 1ZUIPO ΤϯδχΞΛಛʹืूதͰ͢ʂ
    ੈքͰ௨༻͢ΔαʔϏεΛҰॹʹ૑Γ·͠ΐ͏ʂ