Question

当我尝试在预滚动后立即播放时，AVPlayer跳过我正在播放的视频的前0.5秒时遇到问题。

首先，我创建了播放器：

self.videoPlayer = [[AVPlayer alloc] init];

然后，我将播放器项目添加到播放器并添加观察者以检查项目是否准备就绪：

[self.videoPlayer addObserver:self forKeyPath:@"currentItem" options:0 context:kBLCurrentPlayerItemStatusContext];
[self.videoPlayer replaceCurrentItemWithPlayerItem:self.currentVideoPlayerItem];

观察播放器项目时，我会检查播放器是否准备好播放。如果还没准备好玩，我会添加一个观察者来确保它已经准备好了：

-(void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context{
...
} else if (context == kBLCurrentPlayerItemStatusContext) {
       [self.videoPlayer removeObserver:self forKeyPath:@"currentItem" context:&kBLCurrentPlayerItemStatusContext];
       if ([self.videoPlayer status]==AVPlayerStatusReadyToPlay) {
             [self prerollVideoPlayer];
       } else {
             [self.videoPlayer addObserver:self forKeyPath:@"status" options:0 context:&kBLVideoPlayerStatusContext];
       }
}
...

当观察到玩家状态为准备好播放时，我会预先播放该播放器：

-(void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context{
...
  if (context == kBLVideoPlayerStatusContext) {
      if ([self.videoPlayer status] == AVPlayerStatusReadyToPlay) {
            [self.videoPlayer removeObserver:self forKeyPath:@"status" context:&kBLVideoPlayerStatusContext];
            [self prerollVideoPlayer];
      }
}
...

在前贴片完成后，我会播放播放器：

-(void)prerollVideoPlayer{
    [self.videoPlayer prerollAtRate:1.0 completionHandler:^(BOOL finished){
        if (finished) {
                [self.videoPlayer play];
        }
    }];
}

当玩家以这种方式玩游戏时，它会跳过视频的前0.5秒。如果我没有让玩家在完成预滚动时立即进行游戏，我稍后会调用播放方法它会正常播放。我已经检查过以确保所有观察者都被正确观察，并且它们按照我上面提到的顺序发生。我需要添加另一个观察者或我应该检查的通知以避免这种跳过行为吗？

AVPlayer跳过视频的开头

0 个答案: