よくある動画アプリのあれを実装したい。

Instagram, Vine, SlideStory のような動画アプリで動画を保存する仕込みが気になったので実装しました。

Transcript

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14. "7$BQUVSF"VEJP%BUB0VUQVU AVCaptureVideoDataOutputSampleBufferDelegate AVCaptureAudioDataOutputSampleBufferDelegate "7$BQUVSF7JEFP%BUB0VUQVU
15. #pragma mark - AVCaptureVideoDataOutputSampleBufferDelegate, AVCaptureAudioDataOutputSampleBufferDelegate ! - (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection { ! if (!CMSampleBufferDataIsReady(sampleBuffer)) { NSLog(@"sampleBuffer data is not ready"); } ! CMTime currentTime = CMSampleBufferGetPresentationTimeStamp(sampleBuffer); ! if (self.touching) { ! // Video if ([captureOutput isKindOfClass:[AVCaptureVideoDataOutput class]]) { [self addSamplebuffer:sampleBuffer withWriterInput:(AVAssetWriterInput *)self.assetWriterInputVideo]; } // Audio else if ([captureOutput isKindOfClass:[AVCaptureAudioDataOutput class]]) { [self addSamplebuffer:sampleBuffer withWriterInput:(AVAssetWriterInput *)self.assetWriterInputAudio]; } ! } ! self.recordStartTime = currentTime; } AVCaptureVideoDataOutputSampleBufferDelegate AVCaptureAudioDataOutputSampleBufferDelegate
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    8SJUJOH // AVAssetWriter self.assetWriter = [AVAssetWriter assetWriterWithURL:self.outputURL fileType:AVFileTypeQuickTimeMovie error:&error]; ! ! // movie NSDictionary *videoSetting = self.videoSettings; self.assetWriterInputVideo = [AVAssetWriterInput assetWriterInputWithMediaType:AVMediaTypeVideo outputSettings:videoSetting]; [self.assetWriterInputVideo setExpectsMediaDataInRealTime:YES]; ! ! // audio NSDictionary *audioSetting = self.audioSettings; self.assetWriterInputAudio = [AVAssetWriterInput assetWriterInputWithMediaType:AVMediaTypeAudio outputSettings:audioSetting]; [self.assetWriterInputAudio setExpectsMediaDataInRealTime:YES]; ! ! [self.assetWriter addInput:self.assetWriterInputVideo]; [self.assetWriter addInput:self.assetWriterInputAudio]; ! // queue self.movieWritingQueue = dispatch_queue_create("Movie Writing Queue", DISPATCH_QUEUE_SERIAL); ! // Record [self.assetWriter startWriting]; [self.assetWriter startSessionAtSourceTime:self.recordStartTime]; 
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    8SJUJOH // AVAssetWriter self.assetWriter = [AVAssetWriter assetWriterWithURL:self.outputURL fileType:AVFileTypeQuickTimeMovie error:&error]; ! ! // movie NSDictionary *videoSetting = self.videoSettings; self.assetWriterInputVideo = [AVAssetWriterInput assetWriterInputWithMediaType:AVMediaTypeVideo outputSettings:videoSetting]; [self.assetWriterInputVideo setExpectsMediaDataInRealTime:YES]; ! ! // audio NSDictionary *audioSetting = self.audioSettings; self.assetWriterInputAudio = [AVAssetWriterInput assetWriterInputWithMediaType:AVMediaTypeAudio outputSettings:audioSetting]; [self.assetWriterInputAudio setExpectsMediaDataInRealTime:YES]; ! ! [self.assetWriter addInput:self.assetWriterInputVideo]; [self.assetWriter addInput:self.assetWriterInputAudio]; ! // queue self.movieWritingQueue = dispatch_queue_create("Movie Writing Queue", DISPATCH_QUEUE_SERIAL); ! // Record [self.assetWriter startWriting]; [self.assetWriter startSessionAtSourceTime:self.recordStartTime]; 
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    8SJUJOH // AVAssetWriter self.assetWriter = [AVAssetWriter assetWriterWithURL:self.outputURL fileType:AVFileTypeQuickTimeMovie error:&error]; ! ! // movie NSDictionary *videoSetting = self.videoSettings; self.assetWriterInputVideo = [AVAssetWriterInput assetWriterInputWithMediaType:AVMediaTypeVideo outputSettings:videoSetting]; [self.assetWriterInputVideo setExpectsMediaDataInRealTime:YES]; ! ! // audio NSDictionary *audioSetting = self.audioSettings; self.assetWriterInputAudio = [AVAssetWriterInput assetWriterInputWithMediaType:AVMediaTypeAudio outputSettings:audioSetting]; [self.assetWriterInputAudio setExpectsMediaDataInRealTime:YES]; ! ! [self.assetWriter addInput:self.assetWriterInputVideo]; [self.assetWriter addInput:self.assetWriterInputAudio]; ! // queue self.movieWritingQueue = dispatch_queue_create("Movie Writing Queue", DISPATCH_QUEUE_SERIAL); ! // Record [self.assetWriter startWriting]; [self.assetWriter startSessionAtSourceTime:self.recordStartTime]; 
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    8SJUJOH // AVAssetWriter self.assetWriter = [AVAssetWriter assetWriterWithURL:self.outputURL fileType:AVFileTypeQuickTimeMovie error:&error]; ! ! // movie NSDictionary *videoSetting = self.videoSettings; self.assetWriterInputVideo = [AVAssetWriterInput assetWriterInputWithMediaType:AVMediaTypeVideo outputSettings:videoSetting]; [self.assetWriterInputVideo setExpectsMediaDataInRealTime:YES]; ! ! // audio NSDictionary *audioSetting = self.audioSettings; self.assetWriterInputAudio = [AVAssetWriterInput assetWriterInputWithMediaType:AVMediaTypeAudio outputSettings:audioSetting]; [self.assetWriterInputAudio setExpectsMediaDataInRealTime:YES]; ! ! [self.assetWriter addInput:self.assetWriterInputVideo]; [self.assetWriter addInput:self.assetWriterInputAudio]; ! // queue self.movieWritingQueue = dispatch_queue_create("Movie Writing Queue", DISPATCH_QUEUE_SERIAL); ! // Record [self.assetWriter startWriting]; [self.assetWriter startSessionAtSourceTime:self.recordStartTime]; 
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    8SJUJOH // AVAssetWriter self.assetWriter = [AVAssetWriter assetWriterWithURL:self.outputURL fileType:AVFileTypeQuickTimeMovie error:&error]; ! ! // movie NSDictionary *videoSetting = self.videoSettings; self.assetWriterInputVideo = [AVAssetWriterInput assetWriterInputWithMediaType:AVMediaTypeVideo outputSettings:videoSetting]; [self.assetWriterInputVideo setExpectsMediaDataInRealTime:YES]; ! ! // audio NSDictionary *audioSetting = self.audioSettings; self.assetWriterInputAudio = [AVAssetWriterInput assetWriterInputWithMediaType:AVMediaTypeAudio outputSettings:audioSetting]; [self.assetWriterInputAudio setExpectsMediaDataInRealTime:YES]; ! ! [self.assetWriter addInput:self.assetWriterInputVideo]; [self.assetWriter addInput:self.assetWriterInputAudio]; ! // queue self.movieWritingQueue = dispatch_queue_create("Movie Writing Queue", DISPATCH_QUEUE_SERIAL); ! // Record [self.assetWriter startWriting]; [self.assetWriter startSessionAtSourceTime:self.recordStartTime]; 
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    8SJUJOH - (void)addSamplebuffer:(CMSampleBufferRef)sampleBuffer withWriterInput:(AVAssetWriterInput *)assetWriterInput { CMFormatDescriptionRef formatDescription = CMSampleBufferGetFormatDescription(sampleBuffer); ! CFRetain(sampleBuffer); CFRetain(formatDescription); dispatch_async(self.movieWritingQueue, ^{ ! if (_assetWriter.status == AVAssetWriterStatusWriting) { ! if (assetWriterInput.readyForMoreMediaData) { ! [assetWriterInput appendSampleBuffer:sampleBuffer]; ! } } ! CFRelease(sampleBuffer); CFRelease(formatDescription); }); }
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    8SJUJOH [self.assetWriterInputVideo markAsFinished]; [self.assetWriterInputAudio markAsFinished]; [self.assetWriter endSessionAtSourceTime:self.recordStartTime]; [self.assetWriter finishWritingWithCompletionHandler:^{ NSLog(@"self.assetWriter finishWritingWithCompletionHandler"); [self.movieURLs addObject:self.outputURL]; NSLog(@"%@", self.movieURLs); }];
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    8SJUJOH [self.assetWriterInputVideo markAsFinished]; [self.assetWriterInputAudio markAsFinished]; [self.assetWriter endSessionAtSourceTime:self.recordStartTime]; [self.assetWriter finishWritingWithCompletionHandler:^{ NSLog(@"self.assetWriter finishWritingWithCompletionHandler"); [self.movieURLs addObject:self.outputURL]; NSLog(@"%@", self.movieURLs); }];
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