MPMoviePlayerController有一个名为playableDuration的属性.
playableDuration The amount of currently playable content (read-only).
@property (nonatomic,readonly) NSTimeInterval playableDuration
For progressively downloaded network content,this property reflects
the amount of content that can be played now.
AVPlayer有类似的东西吗？
我在Apple Docs或Google中找不到任何内容(在Stackoverflow.com上也没有找到)
提前致谢.
解决方法
playableDuration可以通过以下过程粗略地实现：
- (NSTimeInterval) playableDuration
{
// use loadedTimeRanges to compute playableDuration.
AVPlayerItem * item = _moviePlayer.currentItem;
if (item.status == AVPlayerItemStatusReadyToPlay) {
NSArray * timeRangeArray = item.loadedTimeRanges;
CMTimeRange aTimeRange = [[timeRangeArray objectAtIndex:0] CMTimeRangeValue];
double startTime = CMTimeGetSeconds(aTimeRange.start);
double loadedDuration = CMTimeGetSeconds(aTimeRange.duration);
// FIXME: shoule we sum up all sections to have a total playable duration,// or we just use first section as whole?
NSLog(@"get time range,its start is %f seconds,its duration is %f seconds.",startTime,loadedDuration);
return (NSTimeInterval)(startTime + loadedDuration);
}
else
{
return(CMTimeGetSeconds(kCMTimeInvalid));
}
}
_moviePlayer是您的AVPlayer实例,通过检查AVPlayerItem的loadedTimeRanges,您可以计算估计的playableDuration.
对于只有1秒的视频,您可以使用此程序;但对于多节视频,您可能需要检查loadedTimeRagnes数组中的所有时间范围以获得正确答案.
