In my app I have Timeline like facebook and want to implement autoplay the way facebook does. I am able to play a video whenever user stops scrolling on Video post inside UITableViewCell but it takes 5-10 seconds to play a video thats the problem.
I need expert guide how to pre - buffer videos from urls at-least 5 sec to give a user better experience or what is other way to play videos from URL instantly on 3g network. A user might have 100 videos post.
I can't find out which class buffers the videos AVURLAsset , AVPlayerItem or AVPlayer while playing .
I am loading AVURLAsset loadValuesAsynchronouslyForKeys and creating AVPlayerItems then Saving to NSDictionary for URL Key. Below is my code. For security reasons URL gets expired after 15 minutes.
-(void)setContentURL:(NSURL *)contentURL
{
if (contentURL)
{
[self.moviePlayer replaceCurrentItemWithPlayerItem:nil];
[_activityIndicator startAnimating];
__block AVPlayerItem *playerItem=[_appDelegate.dictAVPlayerItems objectForKey:[contentURL.absoluteString stringByAppendingString:self.postIdOrBlogId]];
if (!playerItem)
{
AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:contentURL options:nil];
NSArray *keys = [NSArray arrayWithObject:@"playable"];
[asset loadValuesAsynchronouslyForKeys:keys completionHandler:^()
{
NSLog(@"keys %@", keys);
[self checkAssestStatus:asset];
if (asset==nil)return ;
playerItem = [AVPlayerItem playerItemWithAsset:asset];
[_appDelegate.dictAVPlayerItems setObject:playerItem forKey:[contentURL.absoluteString stringByAppendingString:self.postIdOrBlogId]];
dispatch_async(dispatch_get_main_queue(),
^{
[self addPlayerItem:playerItem isNewAsset:NO];
});
}];
_contentURL = contentURL;
}
else
[self addPlayerItem:playerItem isNewAsset:YES];
}
}
-(void)checkAssestStatus:(AVURLAsset*)asset
{
NSError *error = nil;
AVKeyValueStatus tracksStatus = [asset statusOfValueForKey:@"playable" error:&error];
NSLog(@" AVURLAsset error = %@",error);
if(!asset.isPlayable)
{
NSLog(@"assest is not playable");
[self.activityIndicator stopAnimating];
return;
}
switch (tracksStatus) {
case AVKeyValueStatusLoaded:
{
NSLog(@"loaded");
}
break;
case AVKeyValueStatusFailed:
{
if (error && (error.code == AVErrorUnknown
|| error.code == AVErrorFailedToLoadMediaData))
{
[_appDelegate.dictAVPlayerItems removeObjectForKey:[asset.URL.absoluteString stringByAppendingString:self.postIdOrBlogId]];
NSLog(@"url Expired");
asset=nil;
[CommonTimelineAPI requestFreshURLFor:asset.URL.absoluteString withCompletionBlock:^(NSString *freshURL, NSError *error) {
if(freshURL)
{
NSURL* url=[NSURL URLWithString:freshURL];
if (url)
{
self.contentURL=url;
}
}
}];
}
}
break;
case AVKeyValueStatusCancelled:
{
NSLog(@"cancelled");
}
break;
case AVKeyValueStatusUnknown:
{
NSLog(@"unkonwn");
}
break;
case AVKeyValueStatusLoading:
{
NSLog(@"Loading");
}break;
}
}