Sprite Kit 中的视频序列会导致混乱的中断

Question

我想在 Sprite Kit 中创建视频序列并使用以下代码：

@interface VideScreenNode()
@end

@implementation VideScreenNode

- (void)setupVideoSequence
{
    AVPlayerItem * intro  = [AVPlayerItem playerItemWithURL:[self geturlFromFileName:@"Video1" andType:@"mp4"]];
    AVPlayerItem * video1 = [AVPlayerItem playerItemWithURL:[self geturlFromFileName:@"Video2" andType:@"mp4"]];
    AVPlayerItem * video2 = [AVPlayerItem playerItemWithURL:[self geturlFromFileName:@"Video3" andType:@"mp4"]];
    AVPlayerItem * video3 = [AVPlayerItem playerItemWithURL:[self geturlFromFileName:@"Video4" andType:@"mp4"]];
    AVPlayerItem * video4 = [AVPlayerItem playerItemWithURL:[self geturlFromFileName:@"Video5" andType:@"mp4"]];
    AVPlayerItem * outro  = [AVPlayerItem playerItemWithURL:[self geturlFromFileName:@"Video6" andType:@"mp4"]];

    AVQueuePlayer * queuePlayer = [[AVQueuePlayer alloc] initWithItems:@[intro, video1, video2, video3, video4, outro]];
    SKVideoNode * sequenceNode = [[SKVideoNode alloc] initWithAVPlayer: queuePlayer];

    sequenceNode.position = CGPointMake(512, 384);
    [sequenceNode play];
    [self addChild:sequenceNode];
}

#pragma mark - helper

- (NSURL *)geturlFromFileName:(NSString *)name
                      andType:(NSString *)type
{
    return [NSURL fileURLWithPath: [[NSBundle mainBundle] pathForResource: name ofType:type]];
}

视频序列工作得很好，但每个剪辑之间有一个小中断。如何实现无缝过渡？

提前致谢。

Answer 1

您想在您拥有的 AVQueuePlayer 上添加一个呼叫。如：

[queuePlayer prerollAtRate:float completionHandler:^(BOOL finished)completionHandler];

这会将文件加载到内存中并准备播放。这将对性能产生影响，具体取决于剪辑的大小。它应该平滑你的过渡。但是，您需要注意，如果 status 属性不是 AVPlayerStatusReadyToPlay，这将失败。

Sprite Kit 中的视频序列会导致混乱的中断

Video sequence in Sprite Kit leads to messy interruptions

objective-c

video

sprite-kit

sequence

avqueueplayer