How to play a local video with Swift?

I have a short mp4 video file that I've added to my current Xcode6 Beta project.

I want to play the video in my app.

After hours searching, I can't find anything remotely helpful. Is there a way to accomplish this with Swift or do you have to use Objective-C? Can I get pointed in the right direction? I can't be the only one wondering this.

Sure you can use Swift!

1. Adding the video file

Add the video (lets call it video.m4v) to your Xcode project

2. Checking your video is into the Bundle

Open the Project Navigator cmd + 1

Then select your project root > your Target > Build Phases > Copy Bundle Resources.

Your video MUST be here. If it's not, then you should add it using the plus button

3. Code

Open your View Controller and write this code.

import UIKit
import AVKit
import AVFoundation

class ViewController: UIViewController {

    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        playVideo()
    }

    private func playVideo() {
        guard let path = Bundle.main.path(forResource: "video", ofType:"m4v") else {
            debugPrint("video.m4v not found")
            return
        }
        let player = AVPlayer(url: URL(fileURLWithPath: path))
        let playerController = AVPlayerViewController()
        playerController.player = player
        present(playerController, animated: true) {
            player.play()
        }
    }
}

another Swift 3 Example. The provided solution did not work for me.

private func playVideo(from file:String) {
    let file = file.components(separatedBy: ".")

    guard let path = Bundle.main.path(forResource: file[0], ofType:file[1]) else {
        debugPrint( "\(file.joined(separator: ".")) not found")
        return
    }
    let player = AVPlayer(url: URL(fileURLWithPath: path))

    let playerLayer = AVPlayerLayer(player: player)
    playerLayer.frame = self.view.bounds
    self.view.layer.addSublayer(playerLayer)
    player.play()
}

useage:

playVideo(from: "video.extension")

Note: Check Copy Bundle Resources under Build Phases to ensure that the video is available to the Project.

U can setup AVPlayer in another way, that open for u full customization of your video Player screen

Swift 2.3

1. Create UIView subclass for playing video (basically u can use any UIView object and only needed is AVPlayerLayer. I setup in this way because it much clearer for me)

   import AVFoundation
   import UIKit
   
   class PlayerView: UIView {
   
   override class func layerClass() -> AnyClass {
       return AVPlayerLayer.self
   }
   
   var player:AVPlayer? {
       set {
           if let layer = layer as? AVPlayerLayer {
               layer.player = player
           }
       }
       get {
           if let layer = layer as? AVPlayerLayer {
               return layer.player
           } else {
               return nil
           }
       }
   }
   }
   

2. Setup your player

   import AVFoundation
   import Foundation
   
   protocol VideoPlayerDelegate {
       func downloadedProgress(progress:Double)
       func readyToPlay()
       func didUpdateProgress(progress:Double)
       func didFinishPlayItem()
       func didFailPlayToEnd()
   }
   
   let videoContext:UnsafeMutablePointer<Void> = nil
   
   class VideoPlayer : NSObject {
   
       private var assetPlayer:AVPlayer?
       private var playerItem:AVPlayerItem?
       private var urlAsset:AVURLAsset?
       private var videoOutput:AVPlayerItemVideoOutput?
   
       private var assetDuration:Double = 0
       private var playerView:PlayerView?
   
       private var autoRepeatPlay:Bool = true
       private var autoPlay:Bool = true
   
       var delegate:VideoPlayerDelegate?
   
       var playerRate:Float = 1 {
           didSet {
               if let player = assetPlayer {
                   player.rate = playerRate > 0 ? playerRate : 0.0
               }
           }
       }
   
       var volume:Float = 1.0 {
           didSet {
               if let player = assetPlayer {
                   player.volume = volume > 0 ? volume : 0.0
               }
           }
       }
   
       // MARK: - Init
   
       convenience init(urlAsset:NSURL, view:PlayerView, startAutoPlay:Bool = true, repeatAfterEnd:Bool = true) {
           self.init()
   
           playerView = view
           autoPlay = startAutoPlay
           autoRepeatPlay = repeatAfterEnd
   
           if let playView = playerView, let playerLayer = playView.layer as? AVPlayerLayer {
               playerLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
           }
           initialSetupWithURL(urlAsset)
           prepareToPlay()
       }
   
       override init() {
           super.init()
       }
   
       // MARK: - Public
   
       func isPlaying() -> Bool {
           if let player = assetPlayer {
               return player.rate > 0
           } else {
               return false
           }
       }
   
       func seekToPosition(seconds:Float64) {
           if let player = assetPlayer {
               pause()
               if let timeScale = player.currentItem?.asset.duration.timescale {
                   player.seekToTime(CMTimeMakeWithSeconds(seconds, timeScale), completionHandler: { (complete) in
                       self.play()
                   })
               }
           }
       }
   
       func pause() {
           if let player = assetPlayer {
               player.pause()
           }
       }
   
       func play() {
           if let player = assetPlayer {
               if (player.currentItem?.status == .ReadyToPlay) {
                   player.play()
                   player.rate = playerRate
               }
           }
       }
   
       func cleanUp() {
           if let item = playerItem {
               item.removeObserver(self, forKeyPath: "status")
               item.removeObserver(self, forKeyPath: "loadedTimeRanges")
           }
           NSNotificationCenter.defaultCenter().removeObserver(self)
           assetPlayer = nil
           playerItem = nil
           urlAsset = nil
       }
   
       // MARK: - Private
   
       private func prepareToPlay() {
           let keys = ["tracks"]
           if let asset = urlAsset {
               asset.loadValuesAsynchronouslyForKeys(keys, completionHandler: {
                   dispatch_async(dispatch_get_main_queue(), {
                       self.startLoading()
                   })
               })
           }
       }
   
       private func startLoading(){
           var error:NSError?
           guard let asset = urlAsset else {return}
           let status:AVKeyValueStatus = asset.statusOfValueForKey("tracks", error: &error)
   
           if status == AVKeyValueStatus.Loaded {
               assetDuration = CMTimeGetSeconds(asset.duration)
   
               let videoOutputOptions = [kCVPixelBufferPixelFormatTypeKey as String : Int(kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange)]
               videoOutput = AVPlayerItemVideoOutput(pixelBufferAttributes: videoOutputOptions)
               playerItem = AVPlayerItem(asset: asset)
   
               if let item = playerItem {
                   item.addObserver(self, forKeyPath: "status", options: .Initial, context: videoContext)
                   item.addObserver(self, forKeyPath: "loadedTimeRanges", options: [.New, .Old], context: videoContext)
   
                   NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(playerItemDidReachEnd), name: AVPlayerItemDidPlayToEndTimeNotification, object: nil)
                   NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(didFailedToPlayToEnd), name: AVPlayerItemFailedToPlayToEndTimeNotification, object: nil)
   
                   if let output = videoOutput {
                       item.addOutput(output)
   
                       item.audioTimePitchAlgorithm = AVAudioTimePitchAlgorithmVarispeed
                       assetPlayer = AVPlayer(playerItem: item)
   
                       if let player = assetPlayer {
                           player.rate = playerRate
                       }
   
                       addPeriodicalObserver()
                       if let playView = playerView, let layer = playView.layer as? AVPlayerLayer {
                           layer.player = assetPlayer
                           print("player created")
                       }
                   }
               }
           }        
       }
   
       private func addPeriodicalObserver() {
           let timeInterval = CMTimeMake(1, 1)
   
           if let player = assetPlayer {
               player.addPeriodicTimeObserverForInterval(timeInterval, queue: dispatch_get_main_queue(), usingBlock: { (time) in
                   self.playerDidChangeTime(time)
               })
           }
       }
   
       private func playerDidChangeTime(time:CMTime) {
           if let player = assetPlayer {
               let timeNow = CMTimeGetSeconds(player.currentTime())
               let progress = timeNow / assetDuration
   
               delegate?.didUpdateProgress(progress)
           }
       }
   
       @objc private func playerItemDidReachEnd() {
           delegate?.didFinishPlayItem()
   
           if let player = assetPlayer {
               player.seekToTime(kCMTimeZero)
               if autoRepeatPlay == true {
                   play()
               }
           }
       }
   
       @objc private func didFailedToPlayToEnd() {
           delegate?.didFailPlayToEnd()
       }
   
       private func playerDidChangeStatus(status:AVPlayerStatus) {
           if status == .Failed {
               print("Failed to load video")
           } else if status == .ReadyToPlay, let player = assetPlayer {
               volume = player.volume
               delegate?.readyToPlay()
   
               if autoPlay == true && player.rate == 0.0 {
                   play()
               }
           }
       }
   
       private func moviewPlayerLoadedTimeRangeDidUpdated(ranges:Array<NSValue>) {
           var maximum:NSTimeInterval = 0
           for value in ranges {
               let range:CMTimeRange = value.CMTimeRangeValue
               let currentLoadedTimeRange = CMTimeGetSeconds(range.start) + CMTimeGetSeconds(range.duration)
               if currentLoadedTimeRange > maximum {
                   maximum = currentLoadedTimeRange
               }
           }
           let progress:Double = assetDuration == 0 ? 0.0 : Double(maximum) / assetDuration
   
           delegate?.downloadedProgress(progress)
       }
   
       deinit {
           cleanUp()
       }
   
       private func initialSetupWithURL(url:NSURL) {
           let options = [AVURLAssetPreferPreciseDurationAndTimingKey : true]
           urlAsset = AVURLAsset(URL: url, options: options)
       }
   
       // MARK: - Observations
   
       override func observeValueForKeyPath(keyPath: String?, ofObject object: AnyObject?, change: [String : AnyObject]?, context: UnsafeMutablePointer<Void>) {
           if context == videoContext {
               if let key = keyPath {
                   if key == "status", let player = assetPlayer {
                       playerDidChangeStatus(player.status)
                   } else if key == "loadedTimeRanges", let item = playerItem {
                       moviewPlayerLoadedTimeRangeDidUpdated(item.loadedTimeRanges)
                   }
               }
           }
       }
   
   }
   

3. Usage:

assume u have view

@IBOutlet private weak var playerView: PlayerView!
private var videoPlayer:VideoPlayer?

and in viewDidLoad()

    private func preparePlayer() {
        if let filePath = NSBundle.mainBundle().pathForResource("intro", ofType: "m4v") {
            let fileURL = NSURL(fileURLWithPath: filePath)
            videoPlayer = VideoPlayer(urlAsset: fileURL, view: playerView)
            if let player = videoPlayer {
                player.playerRate = 0.67
            }
        }
    }

Objective-C

PlayerView.h

    #import <AVFoundation/AVFoundation.h>
    #import <UIKit/UIKit.h>

    /*!
     @class PlayerView
     @discussion Represent View for playinv video. Layer - PlayerLayer
     @availability iOS 7 and Up
     */
    @interface PlayerView : UIView

    /*!
     @var player
     @discussion Player object
     */
    @property (strong, nonatomic) AVPlayer *player;

    @end

PlayerView.m

    #import "PlayerView.h"

    @implementation PlayerView

    #pragma mark - LifeCycle

    + (Class)layerClass
    {
        return [AVPlayerLayer class];
    }

    #pragma mark - Setter/Getter

    - (AVPlayer*)player
    {
        return [(AVPlayerLayer *)[self layer] player];
    }

    - (void)setPlayer:(AVPlayer *)player
    {
        [(AVPlayerLayer *)[self layer] setPlayer:player];
    }

    @end

VideoPlayer.h

    #import <AVFoundation/AVFoundation.h>
    #import <UIKit/UIKit.h>
    #import "PlayerView.h"

    /*!
     @protocol VideoPlayerDelegate
     @discussion Events from VideoPlayer
     */
    @protocol VideoPlayerDelegate <NSObject>

    @optional

    /*!
     @brief Called whenever time when progress of played item changed
     @param progress
     Playing progress
     */
    - (void)progressDidUpdate:(CGFloat)progress;

    /*!
     @brief Called whenever downloaded item progress changed
     @param progress
     Playing progress
     */
    - (void)downloadingProgress:(CGFloat)progress;

    /*!
     @brief Called when playing time changed
     @param time
     Playing progress
     */
    - (void)progressTimeChanged:(CMTime)time;

    /*!
     @brief Called when player finish play item
    */
    - (void)playerDidPlayItem;

    /*!
     @brief Called when player ready to play item
     */
    - (void)isReadyToPlay;

    @end

    /*!
     @class VideoPlayer
     @discussion Video Player
     @code
         self.videoPlayer = [[VideoPlayer alloc] initVideoPlayerWithURL:someURL playerView:self.playerView];
         [self.videoPlayer prepareToPlay];
         self.videoPlayer.delegate = self; //optional

         //after when required play item
         [self.videoPlayer play];
     @endcode
     */
    @interface VideoPlayer : NSObject

    /*!
     @var delegate
     @abstract Delegate for VideoPlayer
     @discussion Set object to this property for getting response and notifications from this class
     */
    @property (weak, nonatomic) id <VideoPlayerDelegate> delegate;

    /*!
     @var volume
     @discussion volume of played asset
     */
    @property (assign, nonatomic) CGFloat volume;

    /*!
     @var autoRepeat
     @discussion indicate whenever player should repeat content on finish playing
     */
    @property (assign, nonatomic) BOOL autoRepeat;

    /*!
     @brief Create player with asset URL
     @param urlAsset
     Source URL
     @result
     instance of VideoPlayer
     */
    - (instancetype)initVideoPlayerWithURL:(NSURL *)urlAsset;

    /*!
     @brief Create player with asset URL and configure selected view for showing result
     @param urlAsset
     Source URL
     @param view
     View on wchich result will be showed
     @result
     instance of VideoPlayer
     */
    - (instancetype)initVideoPlayerWithURL:(NSURL *)urlAsset playerView:(PlayerView *)view;

    /*!
     @brief Call this method after creating player to prepare player to play
    */
    - (void)prepareToPlay;

    /*!
     @brief Play item
     */
    - (void)play;
    /*!
     @brief Pause item
     */
    - (void)pause;
    /*!
     @brief Stop item
     */
    - (void)stop;

    /*!
     @brief Seek required position in item and pla if rquired
     @param progressValue
     % of position to seek
     @param isPlaying
     YES if player should start to play item implicity
     */
    - (void)seekPositionAtProgress:(CGFloat)progressValue withPlayingStatus:(BOOL)isPlaying;

    /*!
     @brief Player state
     @result
     YES - if playing, NO if not playing
     */
    - (BOOL)isPlaying;

    /*!
     @brief Indicate whenever player can provide CVPixelBufferRef frame from item
     @result
     YES / NO
     */
    - (BOOL)canProvideFrame;

    /*!
     @brief CVPixelBufferRef frame from item
     @result
     CVPixelBufferRef frame
     */
    - (CVPixelBufferRef)getCurrentFramePicture;

    @end

VideoPlayer.m

    #import "VideoPlayer.h"

    typedef NS_ENUM(NSUInteger, InternalStatus) {
        InternalStatusPreparation,
        InternalStatusReadyToPlay,
    };

    static const NSString *ItemStatusContext;

    @interface VideoPlayer()

    @property (strong, nonatomic) AVPlayer *assetPlayer;
    @property (strong, nonatomic) AVPlayerItem *playerItem;
    @property (strong, nonatomic) AVURLAsset *urlAsset;
    @property (strong, atomic) AVPlayerItemVideoOutput *videoOutput;

    @property (assign, nonatomic) CGFloat assetDuration;
    @property (strong, nonatomic) PlayerView *playerView;

    @property (assign, nonatomic) InternalStatus status;

    @end

    @implementation VideoPlayer

    #pragma mark - LifeCycle

    - (instancetype)initVideoPlayerWithURL:(NSURL *)urlAsset
    {
        if (self = [super init]) {
            [self initialSetupWithURL:urlAsset];
        }
        return self;
    }

    - (instancetype)initVideoPlayerWithURL:(NSURL *)urlAsset playerView:(PlayerView *)view
    {
        if (self = [super init]) {
            ((AVPlayerLayer *)view.layer).videoGravity = AVLayerVideoGravityResizeAspectFill;
            [self initialSetupWithURL:urlAsset playerView:view];
        }
        return self;
    }

    #pragma mark - Public

    - (void)play
    {
        if ((self.assetPlayer.currentItem) && (self.assetPlayer.currentItem.status == AVPlayerItemStatusReadyToPlay)) {
            [self.assetPlayer play];
        }
    }

    - (void)pause
    {
        [self.assetPlayer pause];
    }

    - (void)seekPositionAtProgress:(CGFloat)progressValue withPlayingStatus:(BOOL)isPlaying
    {
        [self.assetPlayer pause];
        int32_t timeScale = self.assetPlayer.currentItem.asset.duration.timescale;

        __weak typeof(self) weakSelf = self;
        [self.assetPlayer seekToTime:CMTimeMakeWithSeconds(progressValue, timeScale) completionHandler:^(BOOL finished) {
            DLog(@"SEEK To time %f - success", progressValue);
            if (isPlaying && finished) {
                [weakSelf.assetPlayer play];
            }
        }];
    }

    - (void)setPlayerVolume:(CGFloat)volume
    {
        self.assetPlayer.volume = volume > .0 ? MAX(volume, 0.7) : 0.0f;
        [self.assetPlayer play];
    }

    - (void)setPlayerRate:(CGFloat)rate
    {
        self.assetPlayer.rate = rate > .0 ? rate : 0.0f;
    }

    - (void)stop
    {
        [self.assetPlayer seekToTime:kCMTimeZero];
        self.assetPlayer.rate =.0f;
    }

    - (BOOL)isPlaying
    {
        return self.assetPlayer.rate > 0 ? YES : NO;
    }

    #pragma mark - Private

    - (void)initialSetupWithURL:(NSURL *)url
    {
        self.status = InternalStatusPreparation;
        [self setupPlayerWithURL:url];
    }

    - (void)initialSetupWithURL:(NSURL *)url playerView:(PlayerView *)view
    {
        [self setupPlayerWithURL:url];
        self.playerView = view;
    }

    - (void)setupPlayerWithURL:(NSURL *)url
    {
        NSDictionary *assetOptions = @{ AVURLAssetPreferPreciseDurationAndTimingKey : @YES };
        self.urlAsset = [AVURLAsset URLAssetWithURL:url options:assetOptions];
    }

    - (void)prepareToPlay
    {
        NSArray *keys = @[@"tracks"];
        __weak VideoPlayer *weakSelf = self;
        [weakSelf.urlAsset loadValuesAsynchronouslyForKeys:keys completionHandler:^{
            dispatch_async(dispatch_get_main_queue(), ^{
                [weakSelf startLoading];
            });
        }];
    }

    - (void)startLoading
    {
        NSError *error;
        AVKeyValueStatus status = [self.urlAsset statusOfValueForKey:@"tracks" error:&error];
        if (status == AVKeyValueStatusLoaded) {
            self.assetDuration = CMTimeGetSeconds(self.urlAsset.duration);
            NSDictionary* videoOutputOptions = @{ (id)kCVPixelBufferPixelFormatTypeKey : @(kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange)};
            self.videoOutput = [[AVPlayerItemVideoOutput alloc] initWithPixelBufferAttributes:videoOutputOptions];
            self.playerItem = [AVPlayerItem playerItemWithAsset: self.urlAsset];

            [self.playerItem addObserver:self
                              forKeyPath:@"status"
                                 options:NSKeyValueObservingOptionInitial
                                 context:&ItemStatusContext];
            [self.playerItem addObserver:self
                              forKeyPath:@"loadedTimeRanges"
                                 options:NSKeyValueObservingOptionNew|NSKeyValueObservingOptionOld
                                 context:&ItemStatusContext];
            [[NSNotificationCenter defaultCenter] addObserver:self
                                                     selector:@selector(playerItemDidReachEnd:)
                                                         name:AVPlayerItemDidPlayToEndTimeNotification
                                                       object:self.playerItem];
            [[NSNotificationCenter defaultCenter] addObserver:self
                                                     selector:@selector(didFailedToPlayToEnd)
                                                         name:AVPlayerItemFailedToPlayToEndTimeNotification
                                                       object:nil];

            [self.playerItem addOutput:self.videoOutput];
            self.assetPlayer = [AVPlayer playerWithPlayerItem:self.playerItem];
            [self addPeriodicalObserver];
            [((AVPlayerLayer *)self.playerView.layer) setPlayer:self.assetPlayer];
            DLog(@"Player created");
        } else {
            DLog(@"The asset's tracks were not loaded:\n%@", error.localizedDescription);
        }
    }

    #pragma mark - Observation

    - (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
    {
        BOOL isOldKey = [change[NSKeyValueChangeNewKey] isEqual:change[NSKeyValueChangeOldKey]];

        if (!isOldKey) {
            if (context == &ItemStatusContext) {
                if ([keyPath isEqualToString:@"status"] && !self.status) {
                    if (self.assetPlayer.status == AVPlayerItemStatusReadyToPlay) {
                        self.status = InternalStatusReadyToPlay;
                    }
                    [self moviePlayerDidChangeStatus:self.assetPlayer.status];
                } else if ([keyPath isEqualToString:@"loadedTimeRanges"]) {
                    [self moviewPlayerLoadedTimeRangeDidUpdated:self.playerItem.loadedTimeRanges];
                }
            }
        }
    }

    - (void)moviePlayerDidChangeStatus:(AVPlayerStatus)status
    {
        if (status == AVPlayerStatusFailed) {
            DLog(@"Failed to load video");
        } else if (status == AVPlayerItemStatusReadyToPlay) {
            DLog(@"Player ready to play");
            self.volume = self.assetPlayer.volume;

            if (self.delegate && [self.delegate respondsToSelector:@selector(isReadyToPlay)]) {
                [self.delegate isReadyToPlay];
            }
        }
    }

    - (void)moviewPlayerLoadedTimeRangeDidUpdated:(NSArray *)ranges
    {
        NSTimeInterval maximum = 0;

        for (NSValue *value in ranges) {
            CMTimeRange range;
            [value getValue:&range];
            NSTimeInterval currenLoadedRangeTime = CMTimeGetSeconds(range.start) + CMTimeGetSeconds(range.duration);
            if (currenLoadedRangeTime > maximum) {
                maximum = currenLoadedRangeTime;
            }
        }
        CGFloat progress = (self.assetDuration == 0) ? 0 : maximum / self.assetDuration;
        if (self.delegate && [self.delegate respondsToSelector:@selector(downloadingProgress:)]) {
            [self.delegate downloadingProgress:progress];
        }
    }

    - (void)playerItemDidReachEnd:(NSNotification *)notification
    {
        if (self.delegate && [self.delegate respondsToSelector:@selector(playerDidPlayItem)]){
            [self.delegate playerDidPlayItem];
        }
        [self.assetPlayer seekToTime:kCMTimeZero];
        if (self.autoRepeat) {
            [self.assetPlayer play];
        }
    }

    - (void)didFailedToPlayToEnd
    {
        DLog(@"Failed play video to the end");
    }

    - (void)addPeriodicalObserver
    {
        CMTime interval = CMTimeMake(1, 1);
        __weak typeof(self) weakSelf = self;
        [self.assetPlayer addPeriodicTimeObserverForInterval:interval queue:dispatch_get_main_queue() usingBlock:^(CMTime time) {
            [weakSelf playerTimeDidChange:time];
        }];
    }

    - (void)playerTimeDidChange:(CMTime)time
    {
        double timeNow = CMTimeGetSeconds(self.assetPlayer.currentTime);
        if (self.delegate && [self.delegate respondsToSelector:@selector(progressDidUpdate:)]) {
            [self.delegate progressDidUpdate:(CGFloat) (timeNow / self.assetDuration)];
        }
    }

    #pragma mark - Notification

    - (void)setupAppNotification
    {
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didEnterBackground) name:UIApplicationDidEnterBackgroundNotification object:nil];
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(willEnterForeground) name:UIApplicationWillEnterForegroundNotification object:nil];
    }

    - (void)didEnterBackground
    {
        [self.assetPlayer pause];
    }

    - (void)willEnterForeground
    {
        [self.assetPlayer pause];
    }

    #pragma mark - GetImagesFromVideoPlayer

    - (BOOL)canProvideFrame
    {
        return self.assetPlayer.status == AVPlayerItemStatusReadyToPlay;
    }

    - (CVPixelBufferRef)getCurrentFramePicture
    {
        CMTime currentTime = [self.videoOutput itemTimeForHostTime:CACurrentMediaTime()];
        if (self.delegate && [self.delegate respondsToSelector:@selector(progressTimeChanged:)]) {
            [self.delegate progressTimeChanged:currentTime];
        }
        if (![self.videoOutput hasNewPixelBufferForItemTime:currentTime]) {
            return 0;
        }
        CVPixelBufferRef buffer = [self.videoOutput copyPixelBufferForItemTime:currentTime itemTimeForDisplay:NULL];

        return buffer;
    }

    #pragma mark - CleanUp

    - (void)removeObserversFromPlayer
    {
        @try {
            [self.playerItem removeObserver:self forKeyPath:@"status"];
            [self.playerItem removeObserver:self forKeyPath:@"loadedTimeRanges"];
            [[NSNotificationCenter defaultCenter] removeObserver:self];
            [[NSNotificationCenter defaultCenter] removeObserver:self.assetPlayer];        
        }
        @catch (NSException *ex) {
            DLog(@"Cant remove observer in Player - %@", ex.description);
        }
    }

    - (void)cleanUp
    {
        [self removeObserversFromPlayer];

        self.assetPlayer.rate = 0;
        self.assetPlayer = nil;
        self.playerItem = nil;
        self.urlAsset = nil;
    }

    - (void)dealloc
    {
        [self cleanUp];    
    }

    @end

Off cause resource (video file) should have target membership setted to your project

Additional - link to perfect Apple Developer guide

Swift 3

if let filePath = Bundle.main.path(forResource: "small", ofType: ".mp4") {
    let filePathURL = NSURL.fileURL(withPath: filePath)

    let player = AVPlayer(url: filePathURL)
    let playerController = AVPlayerViewController()
    playerController.player = player
    self.present(playerController, animated: true) {
        player.play()
    }
}

Here a solution for Swift 5.2

PlayerView.swift:

import AVFoundation
import UIKit

class PlayerView: UIView {

    var player: AVPlayer? {
        get {
            return playerLayer.player
        }
        set {
            playerLayer.player = newValue
        }
    }

    var playerLayer: AVPlayerLayer {
        return layer as! AVPlayerLayer
    }

    // Override UIView property
    override static var layerClass: AnyClass {
        return AVPlayerLayer.self
    }
}

VideoPlayer.swift

import AVFoundation
import Foundation

protocol VideoPlayerDelegate {
    func downloadedProgress(progress:Double)
    func readyToPlay()
    func didUpdateProgress(progress:Double)
    func didFinishPlayItem()
    func didFailPlayToEnd()
}

let videoContext: UnsafeMutableRawPointer? = nil

class VideoPlayer : NSObject {

    private var assetPlayer:AVPlayer?
    private var playerItem:AVPlayerItem?
    private var urlAsset:AVURLAsset?
    private var videoOutput:AVPlayerItemVideoOutput?

    private var assetDuration:Double = 0
    private var playerView:PlayerView?

    private var autoRepeatPlay:Bool = true
    private var autoPlay:Bool = true

    var delegate:VideoPlayerDelegate?

    var playerRate:Float = 1 {
        didSet {
            if let player = assetPlayer {
                player.rate = playerRate > 0 ? playerRate : 0.0
            }
        }
    }

    var volume:Float = 1.0 {
        didSet {
            if let player = assetPlayer {
                player.volume = volume > 0 ? volume : 0.0
            }
        }
    }

    // MARK: - Init

    convenience init(urlAsset:NSURL, view:PlayerView, startAutoPlay:Bool = true, repeatAfterEnd:Bool = true) {
        self.init()

        playerView = view
        autoPlay = startAutoPlay
        autoRepeatPlay = repeatAfterEnd

        if let playView = playerView, let playerLayer = playView.layer as? AVPlayerLayer {
            playerLayer.videoGravity = AVLayerVideoGravity.resizeAspectFill
        }
        initialSetupWithURL(url: urlAsset)
        prepareToPlay()
    }

    override init() {
        super.init()
    }

    // MARK: - Public

    func isPlaying() -> Bool {
        if let player = assetPlayer {
            return player.rate > 0
        } else {
            return false
        }
    }

    func seekToPosition(seconds:Float64) {
        if let player = assetPlayer {
            pause()
            if let timeScale = player.currentItem?.asset.duration.timescale {
                player.seek(to: CMTimeMakeWithSeconds(seconds, preferredTimescale: timeScale), completionHandler: { (complete) in
                    self.play()
                })
            }
        }
    }

    func pause() {
        if let player = assetPlayer {
            player.pause()
        }
    }

    func play() {
        if let player = assetPlayer {
            if (player.currentItem?.status == .readyToPlay) {
                player.play()
                player.rate = playerRate
            }
        }
    }

    func cleanUp() {
        if let item = playerItem {
            item.removeObserver(self, forKeyPath: "status")
            item.removeObserver(self, forKeyPath: "loadedTimeRanges")
        }
        NotificationCenter.default.removeObserver(self)
        assetPlayer = nil
        playerItem = nil
        urlAsset = nil
    }

    // MARK: - Private

    private func prepareToPlay() {
        let keys = ["tracks"]
        if let asset = urlAsset {
            asset.loadValuesAsynchronously(forKeys: keys, completionHandler: {
                DispatchQueue.main.async {
                    self.startLoading()
                }
            })
        }
    }

    private func startLoading(){
        var error:NSError?
        guard let asset = urlAsset else {return}
        let status:AVKeyValueStatus = asset.statusOfValue(forKey: "tracks", error: &error)

        if status == AVKeyValueStatus.loaded {
            assetDuration = CMTimeGetSeconds(asset.duration)

            let videoOutputOptions = [kCVPixelBufferPixelFormatTypeKey as String : Int(kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange)]
            videoOutput = AVPlayerItemVideoOutput(pixelBufferAttributes: videoOutputOptions)
            playerItem = AVPlayerItem(asset: asset)

            if let item = playerItem {
                item.addObserver(self, forKeyPath: "status", options: .initial, context: videoContext)
                item.addObserver(self, forKeyPath: "loadedTimeRanges", options: [.new, .old], context: videoContext)

                NotificationCenter.default.addObserver(self, selector: #selector(playerItemDidReachEnd), name: NSNotification.Name.AVPlayerItemDidPlayToEndTime, object: nil)
                NotificationCenter.default.addObserver(self, selector: #selector(didFailedToPlayToEnd), name: NSNotification.Name.AVPlayerItemFailedToPlayToEndTime, object: nil)

                if let output = videoOutput {
                    item.add(output)

                    item.audioTimePitchAlgorithm = AVAudioTimePitchAlgorithm.varispeed
                    assetPlayer = AVPlayer(playerItem: item)

                    if let player = assetPlayer {
                        player.rate = playerRate
                    }

                    addPeriodicalObserver()
                    if let playView = playerView, let layer = playView.layer as? AVPlayerLayer {
                        layer.player = assetPlayer
                        print("player created")
                    }
                }
            }
        }
    }

    private func addPeriodicalObserver() {
        let timeInterval = CMTimeMake(value: 1, timescale: 1)

        if let player = assetPlayer {
            player.addPeriodicTimeObserver(forInterval: timeInterval, queue: DispatchQueue.main, using: { (time) in
                self.playerDidChangeTime(time: time)
            })
        }
    }

    private func playerDidChangeTime(time:CMTime) {
        if let player = assetPlayer {
            let timeNow = CMTimeGetSeconds(player.currentTime())
            let progress = timeNow / assetDuration

            delegate?.didUpdateProgress(progress: progress)
        }
    }

    @objc private func playerItemDidReachEnd() {
        delegate?.didFinishPlayItem()

        if let player = assetPlayer {
            player.seek(to: CMTime.zero)
            if autoRepeatPlay == true {
                play()
            }
        }
    }

    @objc private func didFailedToPlayToEnd() {
        delegate?.didFailPlayToEnd()
    }

    private func playerDidChangeStatus(status:AVPlayer.Status) {
        if status == .failed {
            print("Failed to load video")
        } else if status == .readyToPlay, let player = assetPlayer {
            volume = player.volume
            delegate?.readyToPlay()

            if autoPlay == true && player.rate == 0.0 {
                play()
            }
        }
    }

    private func moviewPlayerLoadedTimeRangeDidUpdated(ranges:Array<NSValue>) {
        var maximum:TimeInterval = 0
        for value in ranges {
            let range:CMTimeRange = value.timeRangeValue
            let currentLoadedTimeRange = CMTimeGetSeconds(range.start) + CMTimeGetSeconds(range.duration)
            if currentLoadedTimeRange > maximum {
                maximum = currentLoadedTimeRange
            }
        }
        let progress:Double = assetDuration == 0 ? 0.0 : Double(maximum) / assetDuration

        delegate?.downloadedProgress(progress: progress)
    }

    deinit {
        cleanUp()
    }

    private func initialSetupWithURL(url:NSURL) {
        let options = [AVURLAssetPreferPreciseDurationAndTimingKey : true]
        urlAsset = AVURLAsset(url: url as URL, options: options)
    }

    // MARK: - Observations
    override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {

        if context == videoContext {
            if let key = keyPath {
                if key == "status", let player = assetPlayer {
                    playerDidChangeStatus(status: player.status)
                } else if key == "loadedTimeRanges", let item = playerItem {
                    moviewPlayerLoadedTimeRangeDidUpdated(ranges: item.loadedTimeRanges)
                }
            }
        }
    }
}

Usage:

private var playerView: PlayerView = PlayerView()
private var videoPlayer:VideoPlayer?

and inside viewDidLoad():

view.addSubview(playerView)
preparePlayer()

// set Constraints (if you do it purely in code)
playerView.translatesAutoresizingMaskIntoConstraints = false
playerView.topAnchor.constraint(equalTo: view.topAnchor, constant: 10.0).isActive = true
playerView.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 10.0).isActive = true
playerView.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -10.0).isActive = true
playerView.bottomAnchor.constraint(equalTo: view.bottomAnchor, constant: 10.0).isActive = true

private func preparePlayer() {
    if let filePath = Bundle.main.path(forResource: "my video", ofType: "mp4") {
        let fileURL = NSURL(fileURLWithPath: filePath)
        videoPlayer = VideoPlayer(urlAsset: fileURL, view: playerView)
        if let player = videoPlayer {
            player.playerRate = 0.67
        }
    }
}