iOS保存录制视频并上传服务器

一、获取视频输入设备

1 2 3 4 5 6 7 8 9 10 11

//视频输入设备 -(AVCaptureDeviceInput *)getVideoInput { NSError *error = nil; AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithDeviceType:AVCaptureDeviceTypeBuiltInWideAngleCamera mediaType:AVMediaTypeVideo position:AVCaptureDevicePositionFront]; AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:device error:&error]; return input; }

二、配置输出

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27

//视频输出 -(AVCaptureVideoDataOutput *)getVideoOutputWithQueue:(dispatch_queue_t)queue { if(_videoOutput != nil){ return _videoOutput; } _videoOutput = [[AVCaptureVideoDataOutput alloc] init]; _videoOutput.alwaysDiscardsLateVideoFrames = YES; NSDictionary *settings = [[NSDictionary alloc] initWithObjectsAndKeys: [NSNumber numberWithInt:240], (id)kCVPixelBufferWidthKey, [NSNumber numberWithInt:320], (id)kCVPixelBufferHeightKey, [NSNumber numberWithInt:kCVPixelFormatType_32BGRA],(id)kCVPixelBufferPixelFormatTypeKey, nil]; _videoOutput.videoSettings = settings; [_videoOutput setSampleBufferDelegate:self queue:queue]; return _videoOutput; }

三、初始化AVCaptureSession

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

-(void)setupSession{ //初始化session _captureSession = [[AVCaptureSession alloc]init]; //设置输入输出格式(也会影响预览效果) [_captureSession setSessionPreset:AVCaptureSessionPresetMedium]; AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithDeviceType:AVCaptureDeviceTypeBuiltInWideAngleCamera mediaType:AVMediaTypeVideo position:AVCaptureDevicePositionFront]; AVCaptureDeviceInput *deviceInput = [AVCaptureDeviceInput deviceInputWithDevice:device error:nil]; [_captureSession addInput:deviceInput]; //传入一个线程 dispatch_queue_t videoQueue = dispatch_queue_create("theQueue", NULL); [_captureSession addOutput:[self getVideoOutputWithQueue:videoQueue]]; [_captureSession startRunning]; }

四、设置预览层

1 2 3 4 5 6 7 8 9 10 11 12

-(void)setupPreviewLayer{ _previewLayer = [[AVCaptureVideoPreviewLayer alloc]initWithSession:_captureSession]; _previewLayer.frame = CGRectMake(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT); _previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill; [self.view.layer addSublayer:_previewLayer]; self.view.layer.masksToBounds = YES; }

五、设置AVAssetWriter

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45

-(AVAssetWriter *)setMediaWriter { NSString *videoString = [NSString stringWithFormat:@"xxx.mov"]; NSLog(@"%@",videoString); NSString *path = [NSTemporaryDirectory() stringByAppendingString:videoString]; NSURL *url = [NSURL fileURLWithPath:[NSTemporaryDirectory() stringByAppendingPathComponent:videoString]]; //首先判断当前文件的路径是否存在，如果存在则删除文件 if ([[NSFileManager defaultManager] fileExistsAtPath:path]) { NSLog(@"already exists"); NSError *error; if ([[NSFileManager defaultManager] removeItemAtPath:path error:&error] == NO) { NSLog(@"removeitematpath %@ error :%@", path, error); } } NSError *error = nil; //文件保存到沙盒 _assetWriter = [[AVAssetWriter alloc] initWithURL:url fileType:AVFileTypeQuickTimeMovie error:&error]; 大专栏   iOS保存录制视频并上传服务器 //AVVideoAverageBitRateKey，每秒钟多少bits，仅用于H264 int bitRate = 256 * 1024; NSDictionary *codecSettings = [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithInt:bitRate], AVVideoAverageBitRateKey, nil]; NSDictionary *videoSettings = [NSDictionary dictionaryWithObjectsAndKeys: AVVideoCodecH264, AVVideoCodecKey, [NSNumber numberWithInt:480], AVVideoWidthKey, [NSNumber numberWithInt:320], AVVideoHeightKey, codecSettings, AVVideoCompressionPropertiesKey, nil]; _videoWriterInput = [AVAssetWriterInput assetWriterInputWithMediaType:AVMediaTypeVideo outputSettings:videoSettings]; _videoWriterInput.expectsMediaDataInRealTime = YES; [_assetWriter addInput:_videoWriterInput]; return _assetWriter; }

六、代理中写入文件

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

-(void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection { if(!CMSampleBufferDataIsReady(sampleBuffer)){ NSLog( @"sample buffer is not ready. Skipping sample" ); return; } //设置写入器的写入时间，开启写入 if (_assetWriter.status == AVAssetWriterStatusUnknown) { CMTime startTime = CMSampleBufferGetPresentationTimeStamp(sampleBuffer); [_assetWriter startWriting]; [_assetWriter startSessionAtSourceTime:startTime]; //此时_assetWriter.status为1 NSLog(@"%ld",(long)_assetWriter.status); } if(_assetWriter.status == AVAssetWriterStatusFailed){ NSLog(@"error - %@",_assetWriter.error); } //判断如果正在读取，则直接写入 if(_assetWriter.status == AVAssetWriterStatusWriting){ //写入视频 if([captureOutput isKindOfClass:[_videoOutput class]]){ [_videoWriterInput appendSampleBuffer:sampleBuffer]; } } }

七、上传服务器

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47

-(void)uploadDataToServer{ //字符串乱序 NSString *fineNameString = [[NSString alloc]init]; for (int i = 0; i < 32; i++) { int number = arc4random() % 36; if (number < 10) { int figure = arc4random() % 10; NSString *tempString = [NSString stringWithFormat:@"%d", figure]; fineNameString = [fineNameString stringByAppendingString:tempString]; }else { int figure = (arc4random() % 26) + 97; char character = figure; NSString *tempString = [NSString stringWithFormat:@"%c", character]; fineNameString = [fineNameString stringByAppendingString:tempString]; } } //通过AFN上传数据到服务器 AFHTTPSessionManager *manager = [AFHTTPSessionManager manager]; manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json", @"text/html", @"image/jpeg", @"image/png", @"application/octet-stream", @"text/json", @"video/mov", nil]; manager.responseSerializer = [AFHTTPResponseSerializer serializer]; manager.requestSerializer = [AFHTTPRequestSerializer serializer]; //服务器地址 NSString *uploadAddress = @"http://188.188.188.188:10898/video"; [manager POST:uploadAddress parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> _Nonnull formData) { NSString *path = [NSHomeDirectory() stringByAppendingPathComponent:@"tmp/xxx.mov"]; NSData *videoData = [NSData dataWithContentsOfFile:path]; NSString *fileName = [NSString stringWithFormat:@"%@.mov",fineNameString]; //formData的其他append方法上传文件失败 [formData appendPartWithFileData:videoData name:@"xxx.mov" fileName:fileName mimeType:@"video/mov"]; } progress:^(NSProgress * _Nonnull uploadProgress) { } success:^(NSURLSessionDataTask * _Nonnull task, id _Nullable responseObject) { NSLog(@"视频上传成功 %@", responseObject); } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) { NSLog(@"视频上传失败 %@", error); }]; }