iOS avplayer not playing remote video - ios

Question

I want to play a remote .mp4 video in AvPlayer. Here is my code
NSString *encodedString = [urlString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSURL *videoUrl = [[NSURL alloc]initWithString:encodedString];
self.asset = [AVAsset assetWithURL:videoUrl];
self.player = [AVPlayer playerWithURL:videoUrl];
self.player.actionAtItemEnd = AVPlayerActionAtItemEndNone;
self.playerLayer = [AVPlayerLayer playerLayerWithPlayer:self.player];
self.playerLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
[self.player addObserver:self forKeyPath:#"status" options:0 context:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(playerItemDidReachEnd:)
name:AVPlayerItemDidPlayToEndTimeNotification
object:[self.player currentItem]];
self.playerLayer.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);
[self.myPlayerView.layer addSublayer:self.playerLayer];
self.videoPlaybackPosition = 0;
[self.player play];
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
if (object == self.player && [keyPath isEqualToString:#"status"]) {
if (self.player.status == AVPlayerStatusFailed) {
NSLog(#"AVPlayer Failed --> %ld",(long)self.player.currentItem.status);
} else if (self.player.status == AVPlayerStatusReadyToPlay) {
NSLog(#"AVPlayerStatusReadyToPlay");
[self.player play];
} else if (self.player.status == AVPlayerItemStatusUnknown) {
NSLog(#"AVPlayer Unknown");
}
}
}
AVPlayerStatusReadyToPlay is taking some time to buffering the video and it only working for one time.
But the same code I use to record a video and play it from temp file. In that case it works fine. After uploading the video to server, when I try to play it from server, the video plays for just 1-2 seconds. After that the video got stuck, and nothing happens. I can't understand where is my problem.
Can any one please help me?