AV Foundation

心霊動画アプリ「もう一度ご覧いただこう」を作成してみて

Conference With Developers 2014

Transcript

1. "7'PVOEBUJPO
   ৺ྶಈըΞϓϦʮ΋͏Ұ౓͝ཡ͍ͨͩ͜͏ʯΛ࡞੒ͯ͠Έͯ
   !OBLBKJKBQBO
   

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2. ࠓ೔࿩͢͜ͱ
   w ࣗݾ঺հ
   w ΞϓϦ঺հ
   w "7'PVOEBUJPOΛ࢖࣮ͬͨ૷͋Ε͜Ε
   w ॴײ
   

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3. ࣗݾ঺հ
   !OBLBKJKBQBO
   QBQFSCPZDP
   

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4. !JTPEJOF
   

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5. !JTPEJOF
   ςϨϏͰ΍ΔΑ͏ͳ৺ྶ൪૊
   Έ͍ͨͳಈը࡞Γ͍ͨΜ΍ʙ
   

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6. ͸͍
   

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8. IUUQPXLSJOGPNPWJF
   ΋͏Ұ౓͝ཡ͍ͨͩ͜͏
   ৺ྶಈըΞϓϦ
   

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9. ओͳػೳ
   w ಈը࿥ը
   w ಈըʹ৺ྶΛೖΕΔ
   w ಈըʹςϩοϓͱϫΠϓ
   w ಈըͷγνϡΤʔγϣϯʹ߹ΘͤͯφϨʔγϣϯ
   ΛೖΕΔ
   w ιʔγϟϧڞ༗
   

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10. w .FEJB1MBZFS'SBNFXPSL
    w 6*,JU
    ্Ґ૚ͷϑϨʔϜϫʔΫ
    

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11. "7'PVOEBUJPO
    

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12. ௐࠪ
    

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13. ௐࠪ
    
    
    w "7'PVOEBUJPO1SPHSBNNJOH(VJEF
    w .PWJOHUP"7,JUBOE"7'PVOEBUJPOr
    w $PSF*NBHF&GGFDUTBOE5FDIOJRVFTr
    w "EWBODFE&EJUJOHXJUI"7'PVOEBUJPOr
    

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14. ߏ੒
    

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15. εϩʔϞʔγϣϯಈը
    TFD TFD TFD
    φϨʔγϣϯԻ੠
    ϫΠϓ
    ը૾߹੒
    ಈը݁߹ ಈը݁߹
    

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16. ࣮૷
    

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17. ಈը݁߹
    

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18. // Assetੜ੒
    AVURLAsset *videoAsset = [[AVURLAsset alloc] initWithURL:movieURL options:nil];
    !
    // CompositionTrackੜ੒
    AVMutableCompositionTrack* compositionVideoTrack;
    compositionVideoTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo
    preferredTrackID:kCMPersistentTrackID_Invalid];
    !
    // Ξηοτ͔ΒτϥοΫΛऔಘ
    AVAssetTrack *videoTrack = [[videoAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
    !
    // ઃఆ
    [compositionVideoTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, videoAsset.duration)
    ofTrack:videoTrack
    atTime:self.currentTimeDuration
    error:nil];
    [compositionVideoTrack setPreferredTransform:[[[videoAsset tracksWithMediaType:AVMediaTypeVideo]
    objectAtIndex:0] preferredTransform]];
    AVMutableCompositionTrack *compositionAudioTrack = [mixComposition
    addMutableTrackWithMediaType:AVMediaTypeAudio
    preferredTrackID:kCMPersistentTrackID_Invalid];
    // Assetੜ੒
    [compositionAudioTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, videoAsset.duration)
    ofTrack:[[videoAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0]
    atTime:self.currentTimeDuration error:nil];
    self.currentTimeDuration = [mixComposition duration];
    !
    // Layer Instructionͷ௥Ճ
    AVMutableVideoCompositionLayerInstruction *layerInstruction;
    layerInstruction = [AVMutableVideoCompositionLayerInstruction
    videoCompositionLayerInstructionWithAssetTrack:compositionVideoTrack];
    !
    [self.layerInstructions addObject:layerInstruction];
    ϝσΟΞ৘ใΛอ࣋͠ɺͦͷ৘ใΛऔಘͰ͖Δ
    

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19. // Assetੜ੒
    AVURLAsset *videoAsset = [[AVURLAsset alloc] initWithURL:movieURL options:nil];
    !
    // CompositionTrackੜ੒
    AVMutableCompositionTrack* compositionVideoTrack;
    compositionVideoTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo
    preferredTrackID:kCMPersistentTrackID_Invalid];
    !
    // Ξηοτ͔ΒτϥοΫΛऔಘ
    AVAssetTrack *videoTrack = [[videoAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
    !
    // ઃఆ
    [compositionVideoTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, videoAsset.duration)
    ofTrack:videoTrack
    atTime:self.currentTimeDuration
    error:nil];
    [compositionVideoTrack setPreferredTransform:[[[videoAsset tracksWithMediaType:AVMediaTypeVideo]
    objectAtIndex:0] preferredTransform]];
    AVMutableCompositionTrack *compositionAudioTrack = [mixComposition
    addMutableTrackWithMediaType:AVMediaTypeAudio
    preferredTrackID:kCMPersistentTrackID_Invalid];
    // Assetੜ੒
    [compositionAudioTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, videoAsset.duration)
    ofTrack:[[videoAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0]
    atTime:self.currentTimeDuration error:nil];
    self.currentTimeDuration = [mixComposition duration];
    !
    // Layer Instructionͷ௥Ճ
    AVMutableVideoCompositionLayerInstruction *layerInstruction;
    layerInstruction = [AVMutableVideoCompositionLayerInstruction
    videoCompositionLayerInstructionWithAssetTrack:compositionVideoTrack];
    !
    [self.layerInstructions addObject:layerInstruction];
    ө૾ΛऔΓग़͢
    Ի੠ΛऔΓग़͢
    

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20. // Assetੜ੒
    AVURLAsset *videoAsset = [[AVURLAsset alloc] initWithURL:movieURL options:nil];
    !
    // CompositionTrackੜ੒
    AVMutableCompositionTrack* compositionVideoTrack;
    compositionVideoTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo
    preferredTrackID:kCMPersistentTrackID_Invalid];
    !
    // Ξηοτ͔ΒτϥοΫΛऔಘ
    AVAssetTrack *videoTrack = [[videoAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
    !
    // ઃఆ
    [compositionVideoTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, videoAsset.duration)
    ofTrack:videoTrack
    atTime:self.currentTimeDuration
    error:nil];
    [compositionVideoTrack setPreferredTransform:[[[videoAsset tracksWithMediaType:AVMediaTypeVideo]
    objectAtIndex:0] preferredTransform]];
    AVMutableCompositionTrack *compositionAudioTrack = [mixComposition
    addMutableTrackWithMediaType:AVMediaTypeAudio
    preferredTrackID:kCMPersistentTrackID_Invalid];
    // Assetੜ੒
    [compositionAudioTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, videoAsset.duration)
    ofTrack:[[videoAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0]
    atTime:self.currentTimeDuration error:nil];
    self.currentTimeDuration = [mixComposition duration];
    !
    // Layer Instructionͷ௥Ճ
    AVMutableVideoCompositionLayerInstruction *layerInstruction;
    layerInstruction = [AVMutableVideoCompositionLayerInstruction
    videoCompositionLayerInstructionWithAssetTrack:compositionVideoTrack];
    !
    [self.layerInstructions addObject:layerInstruction];
    ίϯϙδγϣϯΛ૊ΈཱͯΔ
    

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21. ը૾ͷ߹੒ͱ
    Ξχϝʔγϣϯ
    

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23. // generate parent layer
    CALayer* layerRoot = [CALayer layer];
    CALayer* layerVideo = [CALayer layer];
    .
    .
    .
    .
    videoComp = [AVMutableVideoComposition videoComposition];
    videoComp.animationTool = [AVVideoCompositionCoreAnimationTool
    videoCompositionCoreAnimationToolWithPostProcessingAsVideoLayer:layerVideo
    inLayer:layerRoot];
    $"-BZFSʹ$"#BTJD"OJNBUJPOͰ
    ઃఆͨ͠ΞχϝʔγϣϯΛ௥Ճ͢Δ
    

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24. ϫΠϓಈը
    

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26. // Assetੜ੒
    AVURLAsset *videoAsset = [[AVURLAsset alloc] initWithURL:movieURL options:nil];
    // CompositionTrackੜ੒
    AVMutableCompositionTrack* compositionVideoTrack = [mixComposition
    addMutableTrackWithMediaType:AVMediaTypeVideo
    preferredTrackID:kCMPersistentTrackID_Invalid];
    // Trackऔಘ
    AVAssetTrack* videoTrack = [[videoAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
    !
    // ઃఆ
    CMTime timeDuration;
    timeDuration = videoAsset.duration;
    !
    [compositionVideoTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, timeDuration)
    ofTrack:videoTrack
    atTime:kCMTimeZero
    error:nil];
    [compositionVideoTrack setPreferredTransform:[videoTrack preferredTransform]];
    AVMutableVideoCompositionLayerInstruction* layerInstruction;
    layerInstruction = [AVMutableVideoCompositionLayerInstruction
    videoCompositionLayerInstructionWithAssetTrack:compositionVideoTrack];
    [layerInstruction setTransform:CGAffineTransformConcat(scale, trnsration) atTime:kCMTimeZero];
    !
    [self.layerInstructions addObject:layerInstruction];
    ΞϑΟϯม׵
    

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27. εϩʔϞʔγϣϯ
    

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28. // શମʹରͯ͠εϩʔϞʔγϣϯॲཧΛ͔͚Δ
    CMTime durationSlow = CMTimeSubtract(videoAsset.duration, CMTimeMake(9, 1));
    [mixComposition scaleTimeRange:CMTimeRangeMake(CMTimeMake(19, 1), durationSlow)
    toDuration:CMTimeMake(durationSlow.value * 2.0, durationSlow.timescale)];
    ࣮ࡍͷө૾Λ̎ഒͷ࣌ؒͰग़ྗͤ͞Δ
    

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29. εϩʔϞʔγϣϯ
    ϫΠϓಈը
    ը૾ͷ߹੒ͱΞχϝʔγϣϯ
    ಈը݁߹
    ࣮૷
    

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30. "7'PVOEBUJPO
    

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31. ॴײ
    w Ϋϥε໊௕͔ͬͨΓ࣮૷ྔ͕ଟͯ͘େมʂ
    w ͱ͸͍͑ઃܭ͸͢͹Β͍͠
    w ৘ใ͕গͳ͍
    w ϋϚΔͱ਺೔໎૸ঢ়ଶ
    w ࢓ࣄͰશ͘׆͔ͤͳ͍ʂʂʂ
    

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32. 4BNQMF.PWJF
    IUUQTXXXZPVUVCFDPNXBUDI WLKPXF43%*
    %FNP.PWJF
    IUUQTXXXZPVUVCFDPNXBUDI WSKUNK:6
    

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33. 5IBOLT
    

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