如何将视频从 iOS 设备发送到服务器？

我必须将视频从 iPhone 实时发送到服务器。我创建捕获会话并使用 AVCaptureMovieFileOutput。

NSError *error = nil;

captureSession = [[AVCaptureSession alloc] init];
// find, attach devices
AVCaptureDevice *muxedDevice = [AVCaptureDevice defaultDeviceWithMediaType: AVMediaTypeMuxed];
if (muxedDevice) {
    NSLog (@"got muxedDevice");
    AVCaptureDeviceInput *muxedInput = [AVCaptureDeviceInput deviceInputWithDevice:muxedDevice
                                                                             error:&error];
    if (muxedInput) {
        [captureSession addInput:muxedInput];
    }
} else {
    AVCaptureDevice *videoDevice = [AVCaptureDevice defaultDeviceWithMediaType: AVMediaTypeVideo];
    if (videoDevice) {
        NSLog (@"got videoDevice");
        AVCaptureDeviceInput *videoInput = [AVCaptureDeviceInput deviceInputWithDevice:videoDevice
                                                                                 error:&error];
        if (videoInput) {
            [captureSession addInput: videoInput];
        }
    }
    AVCaptureDevice *audioDevice = [AVCaptureDevice defaultDeviceWithMediaType: AVMediaTypeAudio];
    if (audioDevice) {
        NSLog (@"got audioDevice");
        AVCaptureDeviceInput *audioInput = [AVCaptureDeviceInput deviceInputWithDevice:audioDevice
                                                                                 error:&error];
        if (audioInput) {
            [captureSession addInput: audioInput];
        }
    }
}

// create a preview layer from the session and add it to UI
AVCaptureVideoPreviewLayer *previewLayer = [AVCaptureVideoPreviewLayer layerWithSession:captureSession];
previewLayer.frame = view.layer.bounds;
previewLayer.videoGravity = AVLayerVideoGravityResizeAspect;
previewLayer.orientation = AVCaptureVideoOrientationPortrait;
[view.layer addSublayer:previewLayer];

// create capture file output

captureMovieOutput = [[AVCaptureMovieFileOutput alloc] init];
if (! captureMovieURL) {
    captureMoviePath = [[self getMoviePathWithName:MOVIE_FILE_NAME] retain];
    captureMovieURL = [[NSURL alloc] initFileURLWithPath:captureMoviePath];
}
NSLog (@"recording to %@", captureMovieURL);
[captureSession addOutput:captureMovieOutput];

使用ffmpeg对元数据进行编码，可能比AVAssetExportSession更好。但是ffmpeg编码比AVAssetExportSession困难得多；