我现在正在创建一个通过Multipeer连接流式传输视频的应用。它最终还需要记录所述视频流，但这是另一天的另一个问题。
这是我目前的主要课程
self.b_set.last().name
在此功能内
import UIKit
import AVFoundation
import Foundation
import MultipeerConnectivity
class FilmingVC: UIViewController, MCSessionDelegate, MCBrowserViewControllerDelegate, AVCaptureVideoDataOutputSampleBufferDelegate{
//Video
let captureSession = AVCaptureSession()
var previewLayer : AVCaptureVideoPreviewLayer?
var captureDevice : AVCaptureDevice?
var videoDeviceOutput: AVCaptureVideoDataOutput!
var sessionQueue: dispatch_queue_t!
//Multipeer
var peerID: MCPeerID!
var session: MCSession!
var browser: MCBrowserViewController!
var assistant: MCAdvertiserAssistant!
override func viewDidLoad() {
super.viewDidLoad()
//Video
// Do any additional setup after loading the view, typically from a nib.
captureSession.sessionPreset = AVCaptureSessionPresetHigh
let devices = AVCaptureDevice.devices()
// Loop through all the capture devices on this phone
for device in devices {
// Make sure this particular device supports video
if (device.hasMediaType(AVMediaTypeVideo)) {
// Finally check the position and confirm we've got the back camera
if(device.position == AVCaptureDevicePosition.Back) {
captureDevice = device as? AVCaptureDevice
if captureDevice != nil {
print("Capture device found")
beginSession()
}
}
}
}
//Multipeer
self.peerID = MCPeerID(displayName: UIDevice.currentDevice().name)
print( UIDevice.currentDevice().name )
//self.session = MCSession(peer: peerID, securityIdentity: nil, encryptionPreference: .Required)
self.session = MCSession(peer: self.peerID)
self.session.delegate = self
// create the browser viewcontroller with a unique service name
self.browser = MCBrowserViewController(serviceType: "LCOC-Chat", session: self.session)
self.browser.delegate = self
// tell the assistant to start advertising our fabulous chat
self.assistant = MCAdvertiserAssistant(serviceType:"LCOC-Chat", discoveryInfo:nil, session:self.session)
self.assistant.start()
}
/***** Video *****/
func focusTo(value : Float) {
if let device = captureDevice {
do {
try device.lockForConfiguration()
device.setFocusModeLockedWithLensPosition(value, completionHandler: { (time) -> Void in
})
device.unlockForConfiguration()
} catch {
//error message
print("Can't change focus of capture device")
}
}
}
func configureDevice() {
if let device = captureDevice {
do {
try device.lockForConfiguration()
device.focusMode = .Locked
device.unlockForConfiguration()
} catch {
//error message etc.
print("Capture device not configurable")
}
}
}
func beginSession() {
configureDevice()
do {
//try captureSession.addInput(input: captureDevice)
try captureSession.addInput(AVCaptureDeviceInput(device: captureDevice))
updateDeviceSettings(0.0, isoValue: 0.0)
} catch {
//error message etc.
print("Capture device not initialisable")
}
previewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
self.view.layer.addSublayer(previewLayer!)
previewLayer?.frame = self.view.layer.frame
self.view.layer.insertSublayer(previewLayer!, atIndex: 0)
captureSession.startRunning()
}
func updateDeviceSettings(focusValue : Float, isoValue : Float) {
if let device = captureDevice {
do {
try device.lockForConfiguration()
device.setFocusModeLockedWithLensPosition(focusValue, completionHandler: { (time) -> Void in
//
})
// Adjust the iso to clamp between minIso and maxIso based on the active format
let minISO = device.activeFormat.minISO
let maxISO = device.activeFormat.maxISO
let clampedISO = isoValue * (maxISO - minISO) + minISO
device.setExposureModeCustomWithDuration(AVCaptureExposureDurationCurrent, ISO: clampedISO, completionHandler: { (time) -> Void in
//
})
device.unlockForConfiguration()
} catch {
//error message etc.
print("Can't update device settings")
}
}
}
func addVideoOutput() {
videoDeviceOutput = AVCaptureVideoDataOutput()
videoDeviceOutput.alwaysDiscardsLateVideoFrames = true
self.sessionQueue = dispatch_queue_create("Camera Session", DISPATCH_QUEUE_SERIAL)
videoDeviceOutput.setSampleBufferDelegate(self, queue: sessionQueue)
if captureSession.canAddOutput(videoDeviceOutput) {
captureSession.addOutput(videoDeviceOutput)
}
}
/***** Multipeer *****/
@IBAction func sendVideo(sender: UIButton) {
// Bundle up the text in the message field, and send it off to all
// connected peers
addVideoOutput();
if self.session.connectedPeers.count > 0 {
do {
let videoStream: NSOutputStream = try self.session.startStreamWithName("video", toPeer: self.session.connectedPeers[0])
} catch let error as NSError {
let ac = UIAlertController(title: "Send error", message: error.localizedDescription, preferredStyle: .Alert)
ac.addAction(UIAlertAction(title: "OK", style: .Default, handler: nil))
presentViewController(ac, animated: true, completion: nil)
}
}
}
@IBAction func showBrowser(sender: UIButton) {
// Show the browser view controller
self.presentViewController(self.browser, animated: true, completion: nil)
}
func updateChat(text : String, fromPeer peerID: MCPeerID) {
}
func browserViewControllerDidFinish(browserViewController: MCBrowserViewController) {
dismissViewControllerAnimated(true, completion: nil)
}
func browserViewControllerWasCancelled(browserViewController: MCBrowserViewController) {
dismissViewControllerAnimated(true, completion: nil)
}
func browserViewController(browserViewController: MCBrowserViewController, shouldPresentNearbyPeer peerID: MCPeerID, withDiscoveryInfo info: [String : String]?) -> Bool {
return true
}
/****** Session *****/
func session(session: MCSession, didReceiveData data: NSData, fromPeer peerID: MCPeerID) {
// Called when a peer sends an NSData to us
// This needs to run on the main queue
dispatch_async(dispatch_get_main_queue()) {
print("Incoming data:::")
}
print("111111111")
}
func session(session: MCSession, peer peerID: MCPeerID, didChangeState state: MCSessionState) {
switch state {
case MCSessionState.Connected:
print("Connected: \(peerID.displayName)")
case MCSessionState.Connecting:
print("Connecting: \(peerID.displayName)")
case MCSessionState.NotConnected:
print("Not Connected: \(peerID.displayName)")
}
print("22222222")
}
func session(session: MCSession, didStartReceivingResourceWithName resourceName: String, fromPeer peerID: MCPeerID, withProgress progress: NSProgress) {
print("33333333")
}
func session(session: MCSession, didFinishReceivingResourceWithName resourceName: String, fromPeer peerID: MCPeerID, atURL localURL: NSURL, withError error: NSError?) {
print("4444444")
}
func session(session: MCSession, didReceiveStream stream: NSInputStream, withName streamName: String, fromPeer peerID: MCPeerID) {
print("555555555")
}
我想知道通过NSOutputStream流式传输视频有什么好方法，或者甚至是正确的调用函数。我愚蠢地脱离了我的元素，可以真正使用一些帮助。谢谢！