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
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2. ࠓ೔࿩͢͜ͱ w ࣗݾ঺հ
   w ΞϓϦ঺հ
   w "7
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   w ॴײ
3. ࣗݾ঺հ !OBLBKJKBQBO QBQFSCPZ
   
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4. !JTPEJOF
5. !JTPEJOF ςϨϏͰ΍ΔΑ͏ͳ৺ྶ൪૊ Έ͍ͨͳಈը࡞Γ͍ͨΜ΍ʙ
6. ͸͍
8. IUUQPXLSJOGPNPWJF ΋͏Ұ౓͝ཡ͍ͨͩ͜͏ ৺ྶಈըΞϓϦ
9. ओͳػೳ w ಈը࿥ը
   w ಈըʹ৺ྶΛೖΕΔ
   w ಈըʹςϩοϓͱϫΠϓ
   w ಈըͷγνϡΤʔγϣϯʹ߹ΘͤͯφϨʔγϣϯ ΛೖΕΔ
   w ιʔγϟϧڞ༗
10. w .FEJB
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    w 6*,JU ্Ґ૚ͷϑϨʔϜϫʔΫ
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14. ߏ੒
15. εϩʔϞʔγϣϯಈը TFD TFD TFD φϨʔγϣϯԻ੠
    ϫΠϓ
    ը૾߹੒ ಈը݁߹ ಈը݁߹
16. ࣮૷
17. 
    ಈը݁߹
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
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
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
21. 
    ը૾ͷ߹੒ͱ
    Ξχϝʔγϣϯ
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
24. 
    ϫΠϓಈը
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׵
27. εϩʔϞʔγϣϯ
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
29. 
    εϩʔϞʔγϣϯ 
    ϫΠϓಈը 
    ը૾ͷ߹੒ͱΞχϝʔγϣϯ
    
    ಈը݁߹ ࣮૷
30. "7
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31. ॴײ w Ϋϥε໊௕͔ͬͨΓ࣮૷ྔ͕ଟͯ͘େมʂ
    w ͱ͸͍͑ઃܭ͸͢͹Β͍͠
    w ৘ใ͕গͳ͍
    w ϋϚΔͱ਺೔໎૸ঢ়ଶ
    w ࢓ࣄͰશ͘׆͔ͤͳ͍ʂʂʂ
32. 4BNQMF
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33. 5IBOLT