问题
I have already asked this doubt in my co workers profile, but no solution yet get. Please help me to solve this problem. i am struck more than 4 hours.
So far i did:
I use to choose the video from gallery and display that in screen using mpmovieplayercontroller. Here i am choosing 2 video one by one. If i select first video and to display and when i move to load second video my first video screen is in black. But i need to display the video image in that player. How to do that.please help me out
My code:
import UIKit
import AVFoundation
import MobileCoreServices
import AssetsLibrary
import MediaPlayer
import CoreMedia
class ViewController: UIViewController,UIGestureRecognizerDelegate {
var Asset1: AVAsset?
var Asset2: AVAsset?
var Asset3: AVAsset?
var audioAsset: AVAsset?
var loadingAssetOne = false
// swt duplicate image for thumbnail image for audio
@IBOutlet weak var musicImg: UIImageView!
var videoPlayer = MPMoviePlayerController()
var mediaUI = UIImagePickerController()
var videoURL = NSURL()
override func viewDidLoad() {
super.viewDidLoad()
musicImg.hidden = true
let gestureRecognizer: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "handleTapGesture")
gestureRecognizer.delegate = self;
videoPlayer.view.addGestureRecognizer(gestureRecognizer)
}
func handleTap(gestureRecognizer: UIGestureRecognizer) {
//location = gestureRecognizer .locationInView(videoPlayer.view)
print("tapped")
}
//#pragma mark - gesture delegate
// this allows you to dispatch touches
func gestureRecognizer(gestureRecognizer: UIGestureRecognizer, shouldReceiveTouch touch: UITouch) -> Bool {
return true
}
func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer,
shouldRecognizeSimultaneouslyWithGestureRecognizer otherGestureRecognizer: UIGestureRecognizer) -> Bool {
return true
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func startMediaBrowserFromViewController(viewController: UIViewController!, usingDelegate delegate : protocol<UINavigationControllerDelegate, UIImagePickerControllerDelegate>!) -> Bool {
if UIImagePickerController.isSourceTypeAvailable(.SavedPhotosAlbum) == false {
return false
}
let mediaUI = UIImagePickerController()
mediaUI.sourceType = .SavedPhotosAlbum
mediaUI.mediaTypes = [kUTTypeMovie as String]
mediaUI.allowsEditing = true
mediaUI.delegate = delegate
presentViewController(mediaUI, animated: true, completion: nil)
return true
}
// after merge all video and audio. the final video will be saved in gallery and also will display like preview
func exportDidFinish(session: AVAssetExportSession) {
if session.status == AVAssetExportSessionStatus.Completed {
let outputURL = session.outputURL
let library = ALAssetsLibrary()
if library.videoAtPathIsCompatibleWithSavedPhotosAlbum(outputURL) {
library.writeVideoAtPathToSavedPhotosAlbum(outputURL,
completionBlock: { (assetURL:NSURL!, error:NSError!) -> Void in
if error != nil {
print("some files went wrong")
} else {
// get the output url to display the final video in screen
self.videoURL = outputURL!
self.mediaUI.dismissViewControllerAnimated(true, completion: nil)
self.videoPlayer = MPMoviePlayerController()
self.videoPlayer.contentURL = self.videoURL
self.videoPlayer.controlStyle = .Embedded
self.videoPlayer.scalingMode = .AspectFill
self.videoPlayer.shouldAutoplay = true
self.videoPlayer.backgroundView.backgroundColor = UIColor.clearColor()
self.videoPlayer.fullscreen = true
self.videoPlayer.view.frame = CGRectMake(38, 442, 220, 106)
self.view.addSubview(self.videoPlayer.view)
self.videoPlayer.play()
self.videoPlayer.prepareToPlay()
}
})
}
}
Asset1 = nil
Asset2 = nil
Asset3 = nil
audioAsset = nil
}
// click first video
@IBAction func FirstVideo(sender: AnyObject) {
loadingAssetOne = true
startMediaBrowserFromViewController(self, usingDelegate: self)
}
// clcik second video
@IBAction func SecondVideo(sender: AnyObject) {
loadingAssetOne = false
startMediaBrowserFromViewController(self, usingDelegate: self)
}
// click audio
@IBAction func Audio(sender: AnyObject) {
let mediaPickerController = MPMediaPickerController(mediaTypes: .Any)
mediaPickerController.delegate = self
mediaPickerController.prompt = "Select Audio"
presentViewController(mediaPickerController, animated: true, completion: nil)
}
@IBAction func playPreview(sender: AnyObject) {
startMediaBrowserFromViewController(self, usingDelegate: self)
}
// orientation for the video
func orientationFromTransform(transform: CGAffineTransform) -> (orientation: UIImageOrientation, isPortrait: Bool) {
var assetOrientation = UIImageOrientation.Up
var isPortrait = false
if transform.a == 0 && transform.b == 1.0 && transform.c == -1.0 && transform.d == 0 {
assetOrientation = .Right
isPortrait = true
} else if transform.a == 0 && transform.b == -1.0 && transform.c == 1.0 && transform.d == 0 {
assetOrientation = .Left
isPortrait = true
} else if transform.a == 1.0 && transform.b == 0 && transform.c == 0 && transform.d == 1.0 {
assetOrientation = .Up
} else if transform.a == -1.0 && transform.b == 0 && transform.c == 0 && transform.d == -1.0 {
assetOrientation = .Down
}
return (assetOrientation, isPortrait)
}
func videoCompositionInstructionForTrack(track: AVCompositionTrack, asset: AVAsset) -> AVMutableVideoCompositionLayerInstruction {
let instruction = AVMutableVideoCompositionLayerInstruction(assetTrack: track)
let assetTrack = asset.tracksWithMediaType(AVMediaTypeVideo)[0]
let transform = assetTrack.preferredTransform
let assetInfo = orientationFromTransform(transform)
var scaleToFitRatio = UIScreen.mainScreen().bounds.width / assetTrack.naturalSize.width
if assetInfo.isPortrait {
scaleToFitRatio = UIScreen.mainScreen().bounds.width / assetTrack.naturalSize.height
let scaleFactor = CGAffineTransformMakeScale(scaleToFitRatio, scaleToFitRatio)
instruction.setTransform(CGAffineTransformConcat(assetTrack.preferredTransform, scaleFactor),
atTime: kCMTimeZero)
} else {
let scaleFactor = CGAffineTransformMakeScale(scaleToFitRatio, scaleToFitRatio)
var concat = CGAffineTransformConcat(CGAffineTransformConcat(assetTrack.preferredTransform, scaleFactor), CGAffineTransformMakeTranslation(0, UIScreen.mainScreen().bounds.width / 2))
if assetInfo.orientation == .Down {
let fixUpsideDown = CGAffineTransformMakeRotation(CGFloat(M_PI))
let windowBounds = UIScreen.mainScreen().bounds
let yFix = assetTrack.naturalSize.height + windowBounds.height
let centerFix = CGAffineTransformMakeTranslation(assetTrack.naturalSize.width, yFix)
concat = CGAffineTransformConcat(CGAffineTransformConcat(fixUpsideDown, centerFix), scaleFactor)
}
instruction.setTransform(concat, atTime: kCMTimeZero)
}
return instruction
}
// merge all file
@IBAction func MergeAll(sender: AnyObject) {
if let firstAsset = Asset1, secondAsset = Asset2 {
let mixComposition = AVMutableComposition()
//load first video
let firstTrack = mixComposition.addMutableTrackWithMediaType(AVMediaTypeVideo,
preferredTrackID: Int32(kCMPersistentTrackID_Invalid))
do {
try firstTrack.insertTimeRange(CMTimeRangeMake(kCMTimeZero, firstAsset.duration),
ofTrack: firstAsset.tracksWithMediaType(AVMediaTypeVideo)[0] ,
atTime: kCMTimeZero)
} catch _ {
}
// load second video
let secondTrack = mixComposition.addMutableTrackWithMediaType(AVMediaTypeVideo,
preferredTrackID: Int32(kCMPersistentTrackID_Invalid))
do {
try secondTrack.insertTimeRange(CMTimeRangeMake(kCMTimeZero, secondAsset.duration),
ofTrack: secondAsset.tracksWithMediaType(AVMediaTypeVideo)[0] ,
atTime: firstAsset.duration)
} catch _ {
}
let mainInstruction = AVMutableVideoCompositionInstruction()
mainInstruction.timeRange = CMTimeRangeMake(kCMTimeZero, CMTimeAdd(firstAsset.duration, secondAsset.duration))
let firstInstruction = videoCompositionInstructionForTrack(firstTrack, asset: firstAsset)
firstInstruction.setOpacity(0.0, atTime: firstAsset.duration)
let secondInstruction = videoCompositionInstructionForTrack(secondTrack, asset: secondAsset)
mainInstruction.layerInstructions = [firstInstruction, secondInstruction]
let mainComposition = AVMutableVideoComposition()
mainComposition.instructions = [mainInstruction]
mainComposition.frameDuration = CMTimeMake(1, 30)
mainComposition.renderSize = CGSize(width: UIScreen.mainScreen().bounds.width, height: UIScreen.mainScreen().bounds.height)
//load audio
if let loadedAudioAsset = audioAsset {
let audioTrack = mixComposition.addMutableTrackWithMediaType(AVMediaTypeAudio, preferredTrackID: 0)
do {
try audioTrack.insertTimeRange(CMTimeRangeMake(kCMTimeZero, CMTimeAdd(firstAsset.duration, secondAsset.duration)),
ofTrack: loadedAudioAsset.tracksWithMediaType(AVMediaTypeAudio)[0] ,
atTime: kCMTimeZero)
} catch _ {
}
}
// save the final video to gallery
let documentDirectory = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0]
let dateFormatter = NSDateFormatter()
dateFormatter.dateStyle = .LongStyle
dateFormatter.timeStyle = .ShortStyle
let date = dateFormatter.stringFromDate(NSDate())
// let savePath = documentDirectory.URLByAppendingPathComponent("mergeVideo-\(date).mov")
let savePath = (documentDirectory as NSString).stringByAppendingPathComponent("final-\(date).mov")
let url = NSURL(fileURLWithPath: savePath)
let exporter = AVAssetExportSession(asset: mixComposition, presetName: AVAssetExportPresetHighestQuality)
exporter!.outputURL = url
exporter!.outputFileType = AVFileTypeQuickTimeMovie
exporter!.shouldOptimizeForNetworkUse = true
exporter!.videoComposition = mainComposition
exporter!.exportAsynchronouslyWithCompletionHandler() {
dispatch_async(dispatch_get_main_queue(), { () -> Void in
self.exportDidFinish(exporter!)
})
}
}
}
}
extension ViewController: UIImagePickerControllerDelegate {
// display the first & second video after it picked from gallery
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
let mediaType = info[UIImagePickerControllerMediaType] as! NSString
dismissViewControllerAnimated(true, completion: nil)
if mediaType == kUTTypeMovie {
let avAsset = AVAsset(URL: info[UIImagePickerControllerMediaURL] as! NSURL)
if loadingAssetOne {
if let vURL = info[UIImagePickerControllerMediaURL] as? NSURL {
self.videoURL = vURL
} else {
print("oops, no url")
}
mediaUI.dismissViewControllerAnimated(true, completion: nil)
self.videoPlayer = MPMoviePlayerController()
self.videoPlayer.contentURL = videoURL
self.videoPlayer.view.frame = CGRectMake(38, 57, 220, 106)
self.view.addSubview(self.videoPlayer.view)
self.videoPlayer.controlStyle = .Embedded
self.videoPlayer.scalingMode = .AspectFill
self.videoPlayer.shouldAutoplay = true
self.videoPlayer.prepareToPlay()
self.videoPlayer.play()
Asset1 = avAsset
} else {
if let vURL = info[UIImagePickerControllerMediaURL] as? NSURL {
self.videoURL = vURL
} else {
print("oops, no url")
}
mediaUI.dismissViewControllerAnimated(true, completion: nil)
self.videoPlayer = MPMoviePlayerController()
self.videoPlayer.contentURL = videoURL
self.videoPlayer.view.frame = CGRectMake(38, 206, 220, 106)
self.view.addSubview(self.videoPlayer.view)
self.videoPlayer.play()
self.videoPlayer.controlStyle = .Embedded
self.videoPlayer.scalingMode = .AspectFill
self.videoPlayer.shouldAutoplay = true
self.videoPlayer.prepareToPlay()
Asset2 = avAsset
}
}
}
}
extension ViewController: UINavigationControllerDelegate {
}
extension ViewController: MPMediaPickerControllerDelegate {
func mediaPicker(mediaPicker: MPMediaPickerController, didPickMediaItems mediaItemCollection: MPMediaItemCollection) {
let selectedSongs = mediaItemCollection.items
if selectedSongs.count > 0 {
let song = selectedSongs[0]
if let vURL = song.valueForProperty(MPMediaItemPropertyAssetURL) as? NSURL {
audioAsset = AVAsset(URL: vURL)
dismissViewControllerAnimated(true, completion: nil)
mediaUI.dismissViewControllerAnimated(true, completion: nil)
musicImg.hidden = false
let alert = UIAlertController(title: "yes", message: "Audio Loaded", preferredStyle: .Alert)
alert.addAction(UIAlertAction(title: "OK", style: .Cancel, handler:nil))
presentViewController(alert, animated: true, completion: nil)
} else {
dismissViewControllerAnimated(true, completion: nil)
let alert = UIAlertController(title: "No audio", message: "Audio Not Loaded", preferredStyle: .Alert)
alert.addAction(UIAlertAction(title: "OK", style: .Cancel, handler:nil))
presentViewController(alert, animated: true, completion: nil)
}
} else {
dismissViewControllerAnimated(true, completion: nil)
}
}
func mediaPickerDidCancel(mediaPicker: MPMediaPickerController) {
dismissViewControllerAnimated(true, completion: nil)
}
}
I need to show the image of selected video in screen.Please help me to resolve,Thanks
I follow this link tutorial here
回答1:
If want to play more than one video in same view, you can use AVPlayer of AVFoundation.I have read more about this in StackOverflow and AppleDoucument and Other forums.All they say is not possible using MPMoviePlayerViewController.But it is possible using AVPlayer.
import UIKit
import AVFoundation
import MobileCoreServices
import AssetsLibrary
import MediaPlayer
import CoreMedia
class ViewController: UIViewController,UIGestureRecognizerDelegate {
var optionalInteger: Int?
var Asset1: AVAsset?
var Asset2: AVAsset?
var Asset3: AVAsset?
var audioAsset: AVAsset?
var loadingAssetOne = false
@IBOutlet weak var musicImg: UIImageView!
@IBOutlet var videoView: UIView!
@IBOutlet var videoViewTwo: UIView!
var player : AVPlayer? = nil
var playerLayer : AVPlayerLayer? = nil
var asset : AVAsset? = nil
var playerItem: AVPlayerItem? = nil
override func viewDidLoad()
{
super.viewDidLoad()
musicImg.hidden = true
let gestureRecognizer: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "handleTapGesture")
gestureRecognizer.delegate = self;
videoPlayer.view.addGestureRecognizer(gestureRecognizer)
imageViewVideoOne.hidden = true
imageViewVideoTwo.hidden = true
}
func startMediaBrowserFromViewController(viewController: UIViewController!, usingDelegate delegate : protocol<UINavigationControllerDelegate, UIImagePickerControllerDelegate>!) -> Bool
{
if UIImagePickerController.isSourceTypeAvailable(.SavedPhotosAlbum) == false {
return false
}
let mediaUI = UIImagePickerController()
mediaUI.sourceType = .SavedPhotosAlbum
mediaUI.mediaTypes = [kUTTypeMovie as String]
mediaUI.allowsEditing = true
mediaUI.delegate = delegate
presentViewController(mediaUI, animated: true, completion: nil)
return true
}
// click first video
@IBAction func FirstVideo(sender: AnyObject) {
loadingAssetOne = true
optionalInteger = 0
startMediaBrowserFromViewController(self, usingDelegate: self)
}
// clcik second video
@IBAction func SecondVideo(sender: AnyObject) {
loadingAssetOne = false
optionalInteger = 1
startMediaBrowserFromViewController(self, usingDelegate: self)
}
// click audio
@IBAction func Audio(sender: AnyObject) {
let mediaPickerController = MPMediaPickerController(mediaTypes: .Any)
mediaPickerController.delegate = self
mediaPickerController.prompt = "Select Audio"
presentViewController(mediaPickerController, animated: true, completion: nil)
}
@IBAction func playPreview(sender: AnyObject)
{
startMediaBrowserFromViewController(self, usingDelegate: self)
}
extension ViewController: UIImagePickerControllerDelegate
{
// display the first & second video after it picked from gallery
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject])
{
let mediaType = info[UIImagePickerControllerMediaType] as! NSString
dismissViewControllerAnimated(true, completion: nil)
if mediaType == kUTTypeMovie
{
if loadingAssetOne
{
let avAsset = AVAsset(URL: info[UIImagePickerControllerMediaURL] as! NSURL)
print(avAsset)
if let vURL = info[UIImagePickerControllerMediaURL] as? NSURL {
self.videoURL = vURL
} else {
print("oops, no url")
}
mediaUI.dismissViewControllerAnimated(true, completion: nil)
let videoURLWithPath = info[UIImagePickerControllerMediaURL] as? NSURL
self.videoURL = videoURLWithPath!
asset = AVAsset(URL: videoURL) as AVAsset
playerItem = AVPlayerItem(asset: asset!)
player = AVPlayer (playerItem: self.playerItem!)
playerLayer = AVPlayerLayer(player: self.player)
videoView.frame = CGRectMake(38, 57, 220, 106)
playerLayer?.frame = videoView.frame
videoView.layer.addSublayer(self.playerLayer!)
player!.play()
}
else
{
let avAssetTwo = AVAsset(URL: info[UIImagePickerControllerMediaURL] as! NSURL)
print(avAssetTwo)
if let vURL = info[UIImagePickerControllerMediaURL] as? NSURL {
self.videoURL = vURL
} else {
print("oops, no url")
}
mediaUI.dismissViewControllerAnimated(true, completion: nil)
let videoURLWithPath = info[UIImagePickerControllerMediaURL] as? NSURL
self.videoURL = videoURLWithPath!
asset = AVAsset(URL: videoURL) as AVAsset
playerItem = AVPlayerItem(asset: asset!)
player = AVPlayer (playerItem: self.playerItem!)
playerLayer = AVPlayerLayer(player: self.player)
videoView.frame = CGRectMake(38, 206, 220, 106)
playerLayer?.frame = videoView.frame
videoView.layer.addSublayer(self.playerLayer!)
player!.play()
}
}
}
}
Sources for your question
Multiple Video same screen
Multiple Video Playback on iOS
Apple MPMoviePlayerViewController Document
Playing Multiple Video Simultaneously
Apple AVPlayer Document
Playing Multiple Videos
Playback
Playing Video in iOS
来源：https://stackoverflow.com/questions/33831496/need-to-show-the-image-of-video-in-mpmovieplayercontroller-swift