确定MPMoviez控制器比特率

Question

有没有办法确定MPMovieController正在播放的流的比特率？ 我在iOS上的objective-c编程

Answer 1

您可以从事件中获取指示的比特率，即根据m3u8的流的比特率。为了计算实际比特率，我将event.numberOfBytesTransferred / event.durationWatched除以并乘以8。

NSArray *events = self.player.accessLog.events;
    MPMovieAccessLogEvent *event = (MPMovieAccessLogEvent *)[events lastObject];
double calculatedBitRate = 8 * event.numberOfBytesTransferred / event.durationWatched;
    value = [nf stringFromNumber:[NSNumber numberWithDouble:calculatedBitRate]];
    self.calculatedBitRateLabel.text = [NSString stringWithFormat:@"My calculated bit rate = %@", value];

Answer 2

找到它，“accessLog”为您提供定期统计数据，其中包括观察到的比特率：

MPMovieAccessLogEvent *evt=nil;
MPMovieAccessLog *accessL=[moviePlayer accessLog];
NSArray *events = accessL.events;
for (int i=0; i<[events count]; i++) {
    evt=[events objectAtIndex:i];
}
return evt.observedBitrate